Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
SECTION 24
FINISHES TO BUILDINGS
General:
-
-
Qatar Construction Specifications (QCS 2014) shall be the basis of the Architectural
Specifications unless otherwise indicated hereunder.
Where its applicable according to building typologies indicated in QCS 2014 Section 07,
comply with the following requirements:
o As available, use regionally manufactured and assembled building elements and
materials.
o Use materials with high recycled content.
o Use low VOC paints, adhesives and sealants.
Comply with applicable requirements of the laws, codes, and regulations of authorities
having jurisdiction.
Edition date of indicated Standards and Codes shall be the latest edition in force at the time
of contract award.
Acoustic requirements shall comply with Project Acoustic Requirements.
Comply with all relevant requirements of Qatar Civil Defence.
The following clauses amend the corresponding referenced clauses in Section 24 of QCS,
or are additional clauses, as indicated hereunder.
PART 1 GENERAL
1.1
INTRODUCTION
Scope
Add the below paragraph
Related Documents to Section 24 are as follows:
1.2
(a)
Finish Manual
(b)
Finish Table and Material Legend and drawings.
(c)
Fire & Life Safety
(d)
Acoustic report
SAMPLE PANELS AND CONTROL SAMPLES
Samples
Replace with the below paragraphs
Samples of all finishing materials are to be provided for selection/approval by the Engineer,
in such quantities or such size as is necessary to show natural variations of colour and
texture. Sample panels, minimum size 1.0 m x 1.0 m, of all insitu finishes are to be provided
for selection or approval by the Engineer.
Once a control sample of any insitu finish has been approved, do not change the
constituents or proportions without approval. Ensure that supplies are obtained from one
source and one Manufacturer to give uniform colour and texture throughout the whole of
the Works.
For each type of plasterboard assembly: lining, partition and ceiling, erect and complete an
area of finished work not less than 10 m2 in an approved location indicated by the Engineer
and obtain approval of appearance before proceeding.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 1 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
Add the below paragraphs
1.3
STORAGE OF MATERIALS
Cement shall be stored in dry conditions in unopened bags to avoid contamination or
deterioration.
All finishing materials that are liable to deteriorate or warp in adverse environmental
conditions are to be stored in suitable conditions, with original wrappings left in place for
as long as possible, except for materials which the manufacturer recommends to be
conditioned.
1.4
PROTECTION OF FLOORS
Protect all completed work and approaches with boards or dust sheets. Remove any
mortar droppings immediately.
Provide for polishing and re-finishing of all interior architectural and decorative marble and
stone prior to installation of FF&E. All materials are to be brought back to their specified
condition. Provide monthly polishing or honing for all high traffic areas as required for a
period of one year after soft opening.
1.5
PERFORMANCE REQUIREMENTS
General Requirements
Contractor shall refer to the acoustic drawings and the acoustic report for performance
requirements.
Contractor shall present sound insulation calculations for approval of the partitions with the
required, Rw ratings
On-site testing to be realized by the contractor and in accordance to the following standards
(a)
BS EN ISO 16283-1:2014 Acoustics - Field measurement of sound insulation in
buildings and of building elements. Part 1: Airborne sound insulation
(b)
BS EN ISO 16283-2:2015 Acoustics - Field measurement of sound insulation in
buildings and of building elements. Part 2: Impact sound insulation
(c)
BS EN ISO 3382-2:2008 Acoustics – Measurement of room acoustic parameters.
Part 2: Reverberation time in ordinary rooms.
Laboratory testing to be submitted by the contractor and in accordance to the following
standards
(a)
BS EN ISO 10140-2:2010 Acoustics - Laboratory measurement of sound insulation
of building elements Part 2: Measurement of airborne sound insulation.
(b)
BS EN ISO 140-18 Acoustics - Measurement of sound insulation in buildings and of
building Laboratory measurement of sound generated by rainfall on building
elements.
Acoustic rating values shall be calculated in accordance with:
(a)
BS EN ISO 717-1:2013 Acoustics – Rating of sound insulation in buildings and of
building elements Part 1: Airborne sound insulation
(b)
BS EN ISO 717-1:2013 Acoustics – Rating of sound insulation in buildings and of
building elements Part 2: Impact sound insulation.
Resilient underlay material for reduction of impact noise shall be installed in a sheet form
to ensure continuous support where required to achieve, Rw, Lnw as indicated in acoustic
report
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 2 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
The Impact Sound Insulation Lnw which is a single-figure value of impact noise reduction
used for rating floor systems obtained in accordance with BS EN ISO 717-1:2013 Acoustics
– Rating of sound insulation in buildings and of building elements Part 2: Impact sound
insulation.
The floor constructions in occupied areas should achieve in excess of Rw 60 and are
acceptable in reducing any airborne noise in all cases, except for potentially plant room or
special areas spaces as shown below:
(a)
An impact sound insulation performance between parking and occupied areas of
Lnw 48 or better is required.
(b)
The floor of the plant rooms (technical rooms), above the occupied areas should be
floating floor, and achieve an Rw 70 and an Lnw 38
(c)
The floor of the Laundry, above the occupied areas should achieve an Rw 65 and
an Lnw 42
(d)
The floor of the Gym above the occupied areas should achieve an Rw 65 and an
Lnw 42
(e)
The Swimming pool above the occupied areas should be floating floor.
Floor systems will be provided with manufacturers test certificates to demonstrate
conformity with the required acoustic specification. Floor systems will be installed in
accordance with the manufacturer’s requirements.
Contractor is required to provide details and characteristics of all carpets and resilient
underlay types including impact noise control performance values.
After completion, the onsite measurements for approving if the sound Insulation
requirements are met should follow the ISO 140-7:1998 Methodology.
Flame spread: flame spread class of wall and ceiling finishes shall comply with The Fire &
Life Safety requirements.
Interior floor finish class shall comply with Fire & Life Safety requirements.
PART 2 LATH AND PLASTER
2.5
METAL LATH
Replace item 3 with the paragraph below
For external rendering use stainless steel expanded metal lath, minimum thickness shall
be as per BS EN 13658-2.
2.7
BEADS AND STOPS
Materials
Replace item 2 with the paragraph below
For external plaster where groove is indicated on elevations in the drawings, use powder
coated galvanized steel Plaster beads and Stops, colour of powder coating to match
elevation colour.
2.11
PORTLAND CEMENT PLASTER
Materials
Replace with the following paragraphs
Plastering mix: Plaster for general use comprising:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 3 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(a)
Ordinary Portland cement to BS EN 197-1, Type I, and Type II where Sulfate
resistance is required
(b)
Sand to BS EN 13139, Table 1 or ASTM C 897
(c)
Cement-sand proportions shall be adjusted to give compressive strength not less
than 10-N/ mm2
(d)
Plasticiser to BS EN 934-3 and to approval, to be used with cement-sand mix in
proportions recommended by manufacturer.
Factory-prepared mix: manufacturer's standard factory-packaged blend of Portland
cement, aggregate, water retaining and other suitable admixtures and workability aids
conforming to BS EN 998-2and as follows:
(a)
Lime content: nil.
(b)
Sand: sand to BS EN 13139, Table 1 or ASTM C 897
(c)
Compressive strength: not less than10- N/ mm2
(d)
Plasticiser: to BS 4887-1-2 and to approval.
(e)
Wet mix life: as recommended by manufacturer
(f)
Initial adhesion at 28 days: > 0.3 N/mm2
(g)
Bending (flexural) strength: not less than 1 N/mm2
Test: BS EN 4551-1-2 ; BS EN 1015-1> 4, 6, 7, 19 ASTM C785. Admixtures: do not use
admixtures other than plasticisers and water-retaining agents without prior approval. Do
not use admixtures of any type with proprietary mixes. Do not use calcium chloride or any
admixtures containing calcium chloride.
Bonding agent: styrene-butadiene co-polymer latex (SBR) for use as a waterproof bonding
agent and admixture. When used as a bonding agent it shall have adequate pot-life for
easy workability. Use strictly as per manufacturer's recommendation.
Water: to be clean, free from silt, organic matter, alkali, salts and other deleterious
impurities. Obtain approval of source of supply. Test to BS EN 1008.
VOC and formaldehyde: None (<10μg/l) when tested according to ISO/FDIS 118902/GCMS.
Thermal conductivity according to EN 1745 or as required by the engineer.
Add the following paragraphs
DECORATIVE PREMIXED RENDERING
Premixed, textured rendering with exposed aggregate finish; consisting of white Portland
cement, sized siliceous sand, selected mineral fillers and admixtures. Colour(s) and
texture(s) to be selected by the Engineer from manufacturer’s standard range.
Workmanship
Generally
(a)
Manufacturers' recommendations are to be strictly followed for all materials and
products.
(b)
Internal Plastering is to be executed in accordance with BS 8481and BS 8000-10,
as applicable.
(c)
External Plastering is to be executed in accordance with BS 8000-10, as applicable.
(i)
Apply and cure plaster to prevent plaster drying out during curing period. Use
procedures required by climatic conditions, including moist curing, providing
coverings, and providing barriers to deflect sunlight and wind.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 4 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(ii)
Apply plaster when ambient temperature is greater than 4.4 deg C.
(iii)
Protect plaster coats from freezing for not less than 48 hours after set of
plaster coat has occurred.
(d)
provide sample panels of the decorative coatings, size not less than 1 m2, and
obtain approval of colour and texture before starting work
(e)
Control sample : for each type of coating work, complete sample areas, being part
of the finished work, in approved locations, size not less than 5 m2 and obtain
approval of appearance before proceeding
(f)
Uniformity of Colour and Texture: once samples of coatings have been approved,
do not change type or proportion of constituent materials. Ensure that supplies of
materials are sufficient to give consistent and uniform colour and texture. Obtain
each material from one source and mix different loads if necessary.
(g)
Store cement, and plaster separately by different types, off the ground, in a dry, well
ventilated areas. Use in order of delivery and within manufacturer's recommended
time limit. Reject any bag which contains caked or partially set material.
(h)
Mixing: measure materials by volume using clean gauge boxes. Proportions of
specified mixes are for damp sand, adjust proportions if dry sand is used.
Thoroughly mix materials dry until uniform in appearance. Add water and mix to a
consistency suitable for the work.
(i)
Scaffolding: use independent scaffolding to avoid put-log holes and other breaks in
coatings.
(j)
Cleanliness: protect existing work and approaches with boards, dust sheets, etc.
Droppings on finished work are to be cleaned off immediately.
(k)
Apply Coatings firmly to achieve good adhesion and in one continuous operation
between angles and joints. Coatings are not to be less than the thicknesses
specified, firmly bonded, of even and consistent appearance, free from rippling,
hollows and ridges.
(l)
Finish Surfaces to a true plane, to correct line and level, with angles and corners to
a right-angle unless otherwise specified, and with walls and reveals plumb and
square.
(m)
Drying Out: prevent rapid or localised drying out.
(n)
Protection: adequately protect newly applied external coatings against sun, rain and
inclement weather for the first 48 hours using polythene sheet, hung clear of the
face, or other approved method.
(o)
Make good defective or damaged coatings before starting decoration. Cut out and
neatly fix any cracks as instructed.
Preparing Backgrounds
(a)
(b)
Acceptance of Backgrounds: before starting preparation and applying coatings
ensure that:
(i)
Backgrounds are secure, adequately true and level to achieve specified
tolerances, free from contamination and loose areas, reasonably dry and in a
suitable condition to receive specified coatings
(ii)
All cutting, chasing, fixing of concealed conduits, service outlets, fixing pads
and the like and making good of the background are completed.
General Preparation: remove efflorescence, laitance, dirt and other loose material
by thoroughly dry brushing. Remove all traces of paint, grease, dirt and other
materials incompatible with coating by high pressure water jet. Repeat application,
if necessary, to obtain adequate suction and mechanical bond of plaster.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 5 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(c)
Smooth or Dense Concrete Surfaces to receive plaster shall be mechanically
hacked or sandblasted to the satisfaction of the Engineer.
(d)
In Situ Concrete Surfaces: scrub with water containing detergent to ensure complete
removal of mould oil, surface retarders and other materials incompatible with
coating. Rinse with clean water and allow to dry unless otherwise specified.
(e)
Keying/Bonding Treatments: methods other than those specified may be submitted
for approval.
(f)
Bonding Agent: follow the recommendations of the manufacturer.
(g)
Hacking for Key/Bond: roughen surfaces thoroughly and evenly by removing entire
surface to a depth of 3 mm by hacking, bush hammering or abrasive blasting. Clean
surfaces by washing and brushing.
(h)
Spatter dash Keying/Bonding Mix: throw onto previously dampened surfaces to a
thickness of 3 - 5 mm and leave rough. Keep damp with fine water spray or by
covering with polythene until set and allow to dry out slowly and harden before
applying undercoat.
(i)
Adjust Suction of porous or very dry masonry back-grounds by wetting immediately
before applying coatings.
Applying Cement-Sand Plastering
(a)
Number of Coats: apply plastering in two coats, excluding keying/Bonding mix coats
and dubbing out coats, finished to a thickness of 15 mm internally and 20 mm
externally unless otherwise specified.
(b)
Accuracy: maximum permissible gap under a 2 m straight edge and any point on
surface is to be 3 mm.
(c)
Dubbing Out:
(d)
(i)
If necessary to correct inaccuracies, dub out in thicknesses of not more than
10 mm in same mix as undercoat; total thickness of dubbing must not exceed
25 mm unless otherwise approved.
(ii)
In areas where thickness of dubbing will exceed 20 mm, first apply a spatter
dash keying mix.
(iii)
Comb surface of each dubbing out coat as specified, allow each coat to dry
before the next is applied.
Undercoat:
(i)
Coat is to be not less than 8 mm thick; on weak backgrounds coat is to be not
less than 10 mm thick.
(ii)
Comb surface as specified.
(iii)
Brush down each undercoat to remove dust and loose particles and wet
thoroughly before application of final coat.
(e)
Plain Finish Final Coat: apply to uniform thickness of 6 - 10 mm and finish with a
trowel or suitably faced float to give a tight, matt smooth surface. Do not apply water
while working up. Do not draw excessive laitance to surface by overworking.
(f)
Plaster Backing to Receive Rigid Tiles bedded in cement and sand is to be applied
in one coat of thickness not less than 15 mm and have combed surface as specified.
(g)
Sprayed Plaster: Apply by spraying machine to uniform thickness of 15 mm internally
and 20 mm externally or as recommended by manufacturer and finish with a trowel
or suitably faced float to give a tight, matt smooth surface. Do not apply water while
working up. Do not draw excessive laitance to surface by overworking.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 6 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(h)
Drying: keep undercoat and final coat damp for first 3 days by covering with
polythene sheet and/or spraying with water. Thereafter prevent from drying out too
rapidly. Work in shade whenever possible. Allow each coat to dry out thoroughly to
ensure that drying shrinkage is substantially complete before applying next coat.
PART 3 DRY LINING (WALLBOARDS)
3.1
GENERAL
Scope
Adjust 1 to be as the following
This part specifies the requirements for the use of dry wall board or plaster boards for walls
and ceilings
References
Amend 1 to be as follows
The following standards are referred to in this part
BS 1230, ASTM C 1396/1396 M or BS EN 520. Gypsum plasterboard
BS 8000 workmen ship in building sites
3.2
DRY LINING
Replace with the following paragraphs
Materials
Wallboards and baseboards to ASTM C 1396/1396 M or BS EN 520. Select type
recommended and suitable for particular use, purpose, exposure and finish; 125mm thick
with tapered edges unless otherwise indicated. Gypsum wallboards shall be as follows:
(a)
Type: Type X or type H2 with water-resistant and mold resistance properties.
(b)
Type: Type X or type F where required for fire-resistance-rated assemblies.
(c)
Type: Regular where indicated .
(d)
Edges: Featured (rounded or beveled) for prefilling.
(e)
Thickness: As indicated. For fire rated boards, select thickness necessary to achieve
specified fire resistance as indicated in drawings
Water-Resistant
Gypsum
ASTM C 1396/C 1396M
(a)
Backing
Board:
ASTM C 630/C 630M
or
Core: As indicated on Drawings.
Fire board: type GM-F acc. to EN 15283-1,Special gypsum board A1 for fire protection,
Studs and Furrings: made from galvanized mild steel sheet to BS EN 10143, designation
Z2 G275 N and passivated. Sheet thickness is not to be less than 0.56 mm for studs up to
3600 mm high, channels and furrings and not less than 0.71 mm for studs up to 4200 mm
high.
Wire Hangers: ASTM A 641/ 641M, Class 1 zinc coating, soft temper, 4.1 mm diameter.
Hanger Rods: mild steel hot-dip galvanized.
Flat Hangers: mild steel hot-dip galvanized paint.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 7 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
Sound Transmission Characteristics: for gypsum board assemblies with STC, or RW
ratings, provide materials and construction identical to those tested in assembly indicated,
according to ASTM E 90 and classified according to ASTM E 413 by a qualified
independent testing agency acceptable to Engineer.
(a)
STC,Rw Rated Assemblies: As indicated in drawings and Acoustic Manual.
Sound Attenuation Blankets: Unfaced, Glass-Fibre Blanket Insulation: ASTM C 665,
Type I (blankets without membrane facing); consisting of fibers; with maximum flamespread and smoke-developed indexes of 25 and 50, respectively; passing ASTM E 136 for
combustion characteristics.
(a)
Density 140-160 kg/m3.
Fire Resistance Ratings: Where assemblies with fire ratings are indicated, provide
materials and installations which are identical to assemblies tested in accordance with
ASTM E119 by testing laboratories acceptable to authorities having jurisdiction
(a)
Construct assemblies identical to those indicated by reference in UL Fire Resistance
Directory, listing or other agencies acceptable to authorities having jurisdiction.
(b)
Smoke Partitions: Construct of materials consistent with the type of construction.
Capable of resisting the passage of smoke. Extend from floor to underside of floor
or roof deck above.
Flame Spread and Smoke Developed Ratings, Insulation: ASTM E136
(a)
(b)
Rock Wool Mineral Fiber, Un faced:
(i)
Flame Spread: Not to exceed 15.
(ii)
Smoke Developed: 0
Glass Fiber, Foil/Scrim/Kraft Faced:
(i)
Flame Spread: Not to exceed 25.
(ii)
Smoke Developed: Not to exceed 25
Add the following paragraph
Guarantee
Provide complete system warranty in which Manufacturer Installer and Contractor are
jointly and severally responsible and agree to repair or replace, without limitations, all or
any part of the plasterboard linings, partitions and ceilings which fails or becomes defective
in materials or workmanship within specified guarantee period. Defects and failures include
but are not limited to:
(a)
Structural failures including, but not limited to, excessive deflection.
(b)
Failure in fixings.
(c)
Failure of system to meet performance requirements
(d)
Warranty Period: 10 years from date of Substantial Completion.
Add the following paragraphs tell end of this part
3.4
WORKMANSHIP
Generally
Standards: work in this section shall be carried out in accordance with the following
standards and codes of practice:
(a)
BS 8000- 8: code of practice for plasterboard partitions and dry linings.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 8 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(b)
BS 8212-1: code of practice for dry lining and partitioning using gypsum
plasterboard.
Quality of work:
(a)
handle, store, fix and install materials and products in accordance with
manufacturer's recommendations and instructions, ensuring compliance with design
and performance requirements
(b)
set out accurately, true to line, level and plumb
(c)
fix boards only in areas which have been made weathertight
(d)
cut boards neatly and accurately without damage to core or tearing of paper facing;
keep cut edges to a minimum and position at internal angles wherever possible;
mask with bound edges of adjacent boards at external corners
(e)
fix boards securely and firmly; finish neatly to give flush, smooth, flat surfaces, free
from bowing and abrupt changes of level; do not use damaged boards
(f)
Operatives are to be properly trained in partitioning and lining work.
Additional noggings: ensure that noggings, bearers etc. required to support fixtures, fittings
and services are accurately positioned and securely fixed within partitioning and lining.
After fixing boards, mark positions of noggings, bearers etc. for following trades.
Erecting And Finishing
Generally: unless otherwise specified, install steel framing in accordance with ASTM C 754
and requirements of ASTM C 840 applicable to framing installations. Install and finish
gypsum plasterboard panels in accordance with ASTM C 840.
Unless otherwise specified, fix, join and finish boards using methods and materials as
recommended by the board manufacturer and as follows:
(a)
Where not shown otherwise, provide movement joints as appropriate for the area of
ceiling and/or to coincide with movement joints in surrounding structure
(b)
Cut boards neatly and accurately without damaging surfaces and cores. Do not use
damaged boards
(c)
Screw boards securely and firmly to grid members to give a flat surface free from
bowing and lipping. Set heads of screws below surface of boards and fill flush with
surface
(d)
Stagger joints of boards applied in two or more layers. Ensure that edges and ends
of each board are fully supported and screwed to grid members.
Partitioning
Studs at wall junctions and floor/soffit channels are to be fixed securely at 600 mm centres
position studs at equal centres, maintaining sequence across openings; provide additional
studs as necessary to ensure support to all vertical edges of boards
vertical joints between boards on opposite sides of partitions are to be staggered
fix boards to each stud and along all edges with drywall screws at not more than 300 mm
centres and not less than 10 mm from edge of board; set screw heads in a depression; do
not break paper or gypsum core
Multilayer Application:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 9 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(a)
On partitions/walls, apply gypsum board indicated for base layers and face layers
vertically (parallel to framing) with joints of base layers located over stud or furring
member and face-layer joints offset at least one stud or furring member with baselayer joints, unless otherwise indicated or required by fire-resistance-rated
assembly. Stagger joints on opposite sides of partitions
(b)
On Z-furring members, apply base layer vertically (parallel to framing) and face layer
either vertically (parallel to framing) or horizontally (perpendicular to framing) with
vertical joints offset at least one furring member. Locate edge joints of base layer
over furring members.
(c)
Fastening Methods: Fasten base layers with screws; fasten face layers with
adhesive and supplementary fasteners.
Suspended And Furred Ceilings:
Unless otherwise specified suspend ceiling hangers and support framing from building
structure and as follows:
(a)
Install hangers plumb and free from contact with insulation or other objects within
ceiling plenum that are not part of supporting structural or ceiling suspension system
(b)
Where width of ducts and other construction within ceiling plenum produces hanger
spacings that interfere with the location of hangers required to support standard
suspension system members, install supplemental suspension members and
hangers in form of trapezes or equivalent devices; size supplemental suspension
members and hangers to support ceiling loads within performance limits established
by referenced standards
(c)
Secure wire hangers by looping and wire-tying, either directly to structures or to
inserts, eyescrews, or other devices and fasteners that are secure and appropriate
for substrate, and in a manner that will not cause them to deteriorate or otherwise
fail
(d)
Secure flat, angle, and rod hangers to structure, including intermediate framing
members, by attaching to inserts, eyescrews, or other devices and fasteners that
are secure and appropriate for structure as well as for type of hanger involved, and
in a manner that will not cause them to deteriorate or otherwise fail
(e)
Do not support ceilings directly from permanent metal forms; furnish cast-in-place
hanger inserts that extend through forms
(f)
Do not attach hangers to steel deck tabs
(g)
Do not attach hangers to steel roof deck; attach hangers to structural members
(h)
Do not connect or suspend steel framing from ducts, pipes, or conduit
(i)
Install suspended steel framing components in sizes and at spacings indicated, but
not less than that required by the referenced steel framing installation standard:
wire hangers:
1200 mm centers
carrying channels (main runners):
1200 mm centers
furring channels (furring members):
400 mm centers
(j)
Installation Tolerances: install steel framing components for suspended ceilings so
that cross-furring or grid suspension members are level to within 3 mm in 3.6 m as
measured both lengthwise on each member and transversely between parallel
members
(k)
Wire-tie or clip furring members to main runners and to other structural supports as
indicated.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 10 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
(l)
Access panel: Provide ceiling flush access panels with frame, concealed hinges,
closing locks and all accessories, size as indicated in drawings ,if not indicated, as
selected by the Engineer from full range of manufacturer sizes, types, and materials,
to receive paint to match ceiling color unless otherwise indicated
Fire Board Enclosures
Where indicated, provide fire proof enclosures assembly
indicated in drawings
to achieve the fire rating
Fireboards are special A1 gypsum boards for fire protection, type GM-F acc. to EN 152831.
(a)
Physical properties :
Board type
Reaction to fire EN 13501-1
Water vapour diffusion resistance μ:
Dry
Wet
Thermal conductivity λ:
Shrinkage and expansion
Per 1% change of relative air humidity
Per 1 kelvin change of temperature
Density
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
GM-F
A1
EN 15283-1
EN ISO 10456
10
4
W/(m·K) 0.23
EN ISO 10456
mm/m
mm/m
kg/m³
0.005 - 0.008
0.013 - 0.02
≥ 780
S24
Page 11 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
Board weight
Board thickness 12.5 mm:
Board thickness 15 mm:
Board thickness 20 mm:
Board thickness 25 mm:
Board thickness 30 mm:
Flexural breaking load (EN 15283-1)
Board thickness 12.5 mm:
Longitudinal direction:
Transverse direction:
Board thickness 15 mm:
Longitudinal direction:
Transverse direction:
Board thickness 20 mm:
Longitudinal direction:
Transverse direction:
Board thickness 25 mm:
Longitudinal direction:
Transverse direction:
Board thickness 30 mm:
Longitudinal direction:
Transverse direction:
Max. Limit for long-term temperature
exposure:
Arc behaviour number: DIN VDE 0303-5
Minimum bending radii (dry bending)
kg/m²
kg/m²
kg/m²
kg/m²
kg/m²
approx. 10.5
approx. 12.0
approx. 15.8
approx. 20.0
approx. 24.0
N
N
≥ 538
≥ 210
N
N
≥ 645
≥ 252
N
N
≥ 860
≥ 336
N
N
≥ 1.075
≥ 420
N
N
≥ 1.290
≥ 504
°C
LV
≤ 50 (short-term ≤ 60)
1.1.1.2
Board thickness in
Min. bending radius r in
mm
mm
12.5
4
15
7
20
10
25
25
30
50
Construction:
(a)
Provide 2 layers fire board for the encasement of Steel structural elements where
indicated, complete with fixing system, substructure, fastening, screws, tapes and
as per manufacture instructions to achieve the fire rating required and as indicted
drawings.
Dimensions as indicated in drawings
Fire rating: 120m minimum unless otherwise indicated.
Provide fire rated steel access panel, dimensions as indicated in drawings and as specified
in section 17 of this specifications
Treat joints between the fire board and slab as fire rated joint system and as specified in
section 30 of this specifications
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 12 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
Provide 6 mm chequered galvanized plate where indicated in drawings and as specified in
section 17 of this specifications
PART 4
SPECIAL WALL SURFACES
Replace with the following paragraphs
4.1
NATURAL STONE CLADDING
GENERAL
For Material types, Thicknesses, Finish and Pattern, refer to Drawings, Finish Manuals and
Legends.
Stone dry lay should be a signed off by the consultant before installation.
Handle tiles and slabs to prevent damage and marking.
Store Slabs on edge on timber battens. Keep dry and protect from inclement weather.
Quality of Stone: to be first quality, each type obtained from one strata, from one quarry
and delivered in one shipment. Slabs are to be hard and free from cracks, fissure, and
other defects to surfaces and edges which may impair structural integrity, function or
appearance and are to be cut square and true with clean edges and uniform in shape and
thickness. Tiles and slabs are to be to the shapes, dimensions and thicknesses shown on
the Drawings. Length and width dimensions of individual tiles and slabs are to be within +/1 mm and thickness with 3 mm from those specified or shown on the Drawings. Submit
samples for approval of quality, colour and texture. Submit supplier's test results for each
type of stone for the following tests:
(a)
(b)
(c)
(d)
(e)
Weight per unit of volume
Absorption coefficient
Compression breaking load
Compression breaking load after freezing
Ultimate tensile strength.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 13 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
MATERIALS
Local Stone: As indicated on drawings. Colour and finish to match adjacent building
finishes.
Limestone Slabs, base and Fittings: Approved natural limestone cut slabs to ASTM C568
with finish indicated on the Drawings, obtained from one strata of one quarry, free from
faults and to the shaped, sizes, and patterns shown on the Drawings.
(a)
Limestone slabs to have the following minimum properties:
(i)
(ii)
(iii)
(iv)
(v)
(b)
Density: 2560 kg/m3.
Compression strength: 55 MPa.
Water absorption: 3 %.
Modulous of rupture: 6.9 MPa.
Abrasion resistance C241, Ha: 10.
Submit samples for approval of quality, texture, colour and dressing.
MISCELLANEOUS STONE CLADDING
Stone base with the following properties where indicated in drawings:
(a)
Description: vertical and horizontal stone application.
(b)
Stone types unless otherwise indicated:
(i)
Limestone where indicated:
(ii)
(iii)
Size and thickness: as indicated in drawings.
Color and finish: As per drawings and to match adjacent building finish, unless
otherwise indicated.
(c)
Fixation: support for angled wall as required for safe secure installation.
(d)
Provide mechanical fastening as required.
(e)
Stone joints: flush butt.
SILICONE-BASED WATER REPELLENT
Solvent based clear impregnating liquid to BS 6477 based on silane / siloxane polymers.
The coating shall be suitable for internal / external applications. It shall be appropriate for
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 14 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
substrate and shall change neither the appearance and texture nor the vapour permeability
of the underlying surface.
FIXINGS AND ACCESSORIES
General: Fixings and Accessories where needed, for anchored Stone Veneer.
Fixings: stainless steel, appropriate types and sizes as recommended and certified for
particular purpose, function, location and background by the manufacturer, and to
approval. Fixings shall be
sufficiently adjustable to meet specified requirements for accuracy and, wherever
practicable, fixed to backing wall by expanding bolts and sockets to avoid problems of
misplaced pockets or channels.
Metal Ties: provide corrugated metal ties of metal indicated, not less than 0.75 mm thick
by 22 mm wide by 178 mm long:
Stainless-Steel Sheet to ASTM A 666, type 316.
BEDDING AND JOINTING MATERIALS
Mortar and Grout are to conform to the requirements of Section 13 of the Specification.
Mortar for Adhering Stone: is to conform to the requirements of Section 13 of the
Specification, and unless otherwise specified, is to comprise:
(a)
Ordinary Portland cement to BS EN 197-1, except for stone types that may stain as
a consequence of use, substitute white Portland cement to BS EN 197-1.
(b)
Sand to BS 1199- 1 / BS EN 13139.
(c)
Submit mix for approval to give a 28 day compressive strength of not less than 5
MPa. Minimum cement sand ratio should be not less than 1:3-4 by volume.
(d)
Use SBR bonding agent as recommended by manufacturer.
Adhesive Bedding: adhesive bedding for stone where indicated on drawings, is to be
proprietary two-component, high-strength, thixotropic, epoxy-based adhesive specially
produced for fixing heavy tiles on damp or wet concrete surfaces, and of non-sag
consistency suitable for both vertical and overhead application s, non-staining to tiles
surfaces, provides fast permanent bond, and certified by manufacturer as suitable for
exterior applications and chemically stable that will not be affected by acid rain. epoxybased adhesive shall comply with the following:
Property
Test Method
Result
Compressive Strength
ANSI A118.3-1992
After 24 hours
Tensile Strength
ASTM D638
Thermal Shock
ANSI A 118.3-1992
Modulus of Elasicity
ASTM D695
Shear Bond Strength (tile to concrete) ANSI A118.3-1992
Water absorption
5.00 MPa, min
25.30 MPa, min
11.00 MPa
1.15 x 10³ Mpa
7.8 MPa, min
0.1 %, max
Multi-Part Non-sag Polyurethane Sealant: chemically curing, elastomeric sealant of base
polymer indicated which complies with ASTM C 920 requirements, including those
referenced for Use T, Type M, Grade NS, Class 25.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 15 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
4.3.6
Workmanship
1
Generally
(a)
(b)
Manufacturer's Recommendations and instructions are to be strictly followed for use
of all products and materials.
Integrity:
Stone Veneer is to resist all dead and live loads and other design forces
indicated for this project.
Accommodate without damage all drying shrinkage, creep, deflections and
thermal movements.
(c)
(d)
(e)
2
Stone Work is not to be commenced prior to 28 days after removal of shuttering
from concrete walls and member.
Stone Work is not to be commenced prior to 28 days after removal of shuttering
from concrete walls and members.
Acceptance of Base: before commencing stone veneer, ensure base is adequately
true and plumb to achieve specified tolerances.
Preparation of Natural Stone Slabs
(f)
Cutting of Stone:
Stones are to be cut so that the bedding is appropriate to its position in the
building.
Finished dimensions of stone units including minimum thickness are to be such
that the cladding, when erected, complies with the requirements for accuracy of
erection
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 16 of 64
Construction of GEWAN District Cooling Plant (DCP)
At the Pearl Qatar
and order to accommodate permissible deviations within the building structure,
selected stone units must be left oversize for cutting to precise dimensions taken
on site; units are to be selected and clearly identified as such on the shop
drawings.
Use a suitable bench saw for cutting on site.
(g)
(h)
(i)
(j)
3
Inspection of Stone Units: completed units must be carefully inspected and
checked for match with approved samples and compliance with the Specification
before dispatch to site. Inform the Engineer at appropriate stages in production
of units so that he may inspect them before delivery to site.
Natural Bed: Mark the natural bed clearly on each stone before it leaves the
quarry.
Location: Mark each stone clearly to indicate its position in the finished work.
Natural Stone: Stone blocks are to be sawn square and true with no irregularities
except at the back.
Fixing of Natural Stone
(a)
Before Commencing Erection, survey the building structure, including any
fixing inserts, and report to the Engineer immediately any inaccuracy
preventing proper positioning of units.
(b)
Accuracy Of Erection:
Variation from Plumb:
For vertical lines and surfaces, do not exceed 6 mm in 3 m,
10 mm in 6 m, or 12 mm in 12 m or more. For external
corners, expansion joints, control joints and other
conspicuous lines, do not exceed 6 mm in 6 m or 12 mm in
12 m or more.
Variation from Level:
For bed joints and lines of exposed lintels, sills, parapets,
horizontal grooves, and other conspicuous lines, do not
exceed 6 mm in 6 m or 12 mm in 12 m or more.
Variation
of
Building Line:
(c)
Linear
For position shown in plan and related portion of walls, and
partitions, do not exceed 12 mm in 6 m or 19 mm in 12 m or
more.
Measure variation from plumb, level, and position shown in plan as the variation
of the average plane of the face of each stone from a plumb, level, or
dimensioned plane.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 17 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Variation in mortar-joint
thickness:
Variation in plane between
adjacent stones:
Variation in plane on face of
individual stone:
(d)
Do not vary from joint size range indicated.
Do not exceed one-half of tolerance
Specified for thickness of stone.
Do not exceed one-half of tolerance
Specified for thickness of stone.
Installing Anchored Stone : anchor masonry veneer to concrete and/or
concrete blockwork with metal anchors to comply with the following:
Install lath over joints at junction of dissimilar background materials, to
Comply with ASTM C 1063.
Install 15 mm thick scratch coat over lath, to comply with ASTM C 926.
Embed anchors in mortar joints to within 25 mm of face.
Space anchors as indicated, but not more than 400 mm centres vertically
and 600 mm centres horizontally, unless otherwise indicated on approved
submittals.
Set stone in full bed of mortar with full head joints, unless otherwise
indicated. Build anchors and ties into mortar joints as stone is set.
Install continuous wire reinforcement in horizontal joints indicated and
attached to seismic veneer anchors, as stone is set.
Fill collar joint solid as stone is set.
Rake out joints for pointing with mortar to depths of not less than 13 mm.
Rake joints to uniform depths with square bottoms and clean sides.
7
Jointing
(a)
(b)
(c)
(d)
(e)
(f)
Bedding and Jointing: stones are to be thoroughly wetted to reduce suction,
a full bed of mortar placed in horizontal joints, vertical joints buttered with
mortar and stones tapped into position with wooden mallet. Strike off joints
flush as work proceeds.
Spacers: use temporary wood or plastic spacers to maintain joint width
Spacers: remove spacers when bedding has set. Make good any voids left
by spacers with same mortar mix.
Structural Movement Joints: provide movement joint in stone veneer where
such joint occurs in structural backing as shown on the Drawings.
Seal movement joints with sealant in accordance with manufacturer's
instructions. Color to be as approved by the Engineer.
Application of sealants:
Backing strip, bond breaker and primer are to be types recommended
by sealant manufacturer
Preparation of joint, depth of sealant and application are to be strictly as
sealant manufacturer's recommendations
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 18 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Joint must be thoroughly clean, dry and free from oil; finely abrade and/or
prime as appropriate; mask edges of joint with tape before priming and
remove immediately after sealing
Insert backing strip and apply sealant ensuring maximum adhesion to
sides of joint and a neat, smooth and clean finish.
8
Protection and Cleaning
(a)
(b)
(c)
(d)
(e)
4.3
Protect newly erected stonework against inclement weather.
Protect decorative or polished surfaces during construction by temporary
cover.
Protect arrisses, mouldings, carvings and other finished work with suitable
and adequate protection firmly fixed.
Slurry: after approval of finished work, coat exposed faces of stonework with
thin protective slurry of lime putty and stone dust. Maintain slurry until final
clean off.
Finally Clean Off and rub down all surfaces and leave stonework perfect and
to approval immediately prior to substantial completion.
GLASS REINFORCED CONCRETE CLADDING AND FEATURES (GRC)
4.3.1
SCOPE
1
Scope: this Section is for the specification of Decorative glass reinforced concrete
(GRC) profiled sheet and panel wall cladding and related accessories. These
panels are for decorative purpose only and are of no structural value.
2
Integrity of cladding: Requirement: Determine sizes and thickness of cladding
panels, sizes, number and spacing of fixings, configuration and location of
secondary support systems and incorporation of accessories to ensure the
cladding system will resist factored dead, imposed and design live loads, and
accommodate deflections and thermal movements without damage. Submit
calculation sheets for Engineers approval.
3
Panel accuracy Finished dimensions of completed panels: Within the permissible
deviations given in BS 8297, table 11.
4
Accuracy of moulds: Check overall dimensions, straightness, squareness, twist
and flatness of moulds immediately before each reuse, and of each unit as soon
as possible after demoulding. Make adjustments to moulds as necessary.
4.3.3
SUBMITTALS
1
Drawings: provide co-ordination, fabrication and installation drawings and other
information showing such details of the work as the Engineer may reasonably
require.
2
including but not necessarily limited to:
3
(a)
layouts of sheets and panels
(b)
details of sheet and panel profiles, corner and edge conditions, joints, supports,
anchorages, and fasteners, underlays, trim, flashings, gutters, closures,
guards, and any special details
Distinguish between factory and field-assembled work.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 19 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
4
Samples: at an agreed stage in the detailed design work, make a sample of the
proposed construction, size 500 x 1000 mm, showing the proposed colour, texture
and incorporating a completed section of a joint and each type of fixing. Obtain
approval of appearance before proceeding.
4.4.3
Quality assurance submittals: submit the following:
1
Test Reports: certified test reports showing compliance with specified performance
characteristics and physical properties. Submit test reports for: Specify flame
spread, tensile strength, light transmission, etc.
2
Certificates: product certificates signed by manufacturer certifying materials
comply with specified performance characteristics and criteria and physical
requirements.
3
Manufacturer's Instructions: manufacturer's installation instructions.
4
Manufacturer's Field Reports: manufacturer's field reports specified herein.
5
Warrantee: provide a written warranty stating that the GRP products are
guaranteed against warping, delamination, chalking, cracking, crazing,
discoloration, breakage or loosening from mountings (other than by malicious
cause) for a period of three years from the date of Final Certificate of Completion.
(a)
4.3.4
Warranty Period: 10 years commencing on Date of Substantial Completion.
QUALITY ASSURANCE
1
Installer qualifications: a qualified firm specializing in performing the work of this
Section with minimum three years documented experience and that is approved,
authorized, or licensed by the product manufacturer to install his product and that
is eligible to receive manufacturer's warranty. Include project names and
addresses, names and addresses of Engineers and Owners, and other information
specified.
2
Manufacturer qualifications: manufacturer capable of providing field service
representation during construction, approving acceptable installer and approving
application method.
3
Fire-test-response characteristics: provide GRC fabrications with the following
surface-burning characteristics as determined by testing identical products per by
Chiltern International Fire, UL or another testing and inspecting agency acceptable
to the Engineer as follows:
(a)
(b)
(c)
4
4.4
BS 476-4:
BS 476-6:
BS 476-7:
Non-combustible.
Fire propagation, class 0.
Surface spread of flame, class 1, zero spread.
Mockup: Build mockup to demonstrate aesthetic effects and set quality standards
for fabrication and installation.
(a)
Build mockup of typical wall area, as directed by Employer’s Representative.
(b)
Approved mockups may become part of the completed Work if undamaged
at time of Substantial Completion.
MATERIALS AND PRODUCTS
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 20 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
4.3.5
Materials
1
Glass Fiber: Alkali-resistant continuous filament fibre. Comply with GRCA
'Specification for alkali resistant glass-fiber roving’s and chopped strands for
reinforcement of cements and concretes'.
2
Cement: To BS EN 197-1, CEM 1 Portland cement.
3
Sand: Type: Silica sand to GRCA 'Specification for the manufacture, curing and
testing of GRC products'.
4
Mixing Water: To BS EN 1008.
5
Admixtures: Type: Submit proposals. Do not use Calcium chloride based
admixtures if GRC contains cast-in steel.
6
Pigments: To BS EN 12878. Type: Powder pigments or dispersions that have
proven successful use in GRC.
7
Mould-Release Agent: The mould-release agent shall be selected by the
manufacturer and approved by the architect or engineer. This should be compatible
with the surface finish required for the product. Any residue shall be removed from
the finished product so that this does not interfere with any joint sealants or applied
finishes which may be use
4.3.6
GRC Cladding Panels
1
Panels shall be composite sheets comprising concrete, glass fibre, pigments and
additives with homogeneous through colour. Panels may include natural
aggregate/powder and/or calcium carbonate powder and shall have high
resistance to erosion and vandalism and shall not delaminate under any condition
and to comply with requirements of BS 1169.
2
Ornamental and Architectural Components include, but are not limited to the
following:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(l)
3
4.3.8
Wall cladding
Arches
Balusters
Columns with capital and base
Brackets
Cornices
Bands
Fins and Parapets
Window surrounds
Decorative features / Sun Screens
Decorative Moucharabieh
Sun barriers
Colour and finish shall be as indicated on drawings and shall match adjacent building
finishes.
FIXINGS AND ACCESSORIES
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 21 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
1
FIXINGS: to be of a suitable type as recommended for particular purpose by GRC
cladding manufacturer, of stainless steel, non-ferrous metal, to avoid bimetallic
corrosion and to give ample adjustability in three dimensions.
4.3.9
WATERPROOFING
1
For water repellents refer to Part 19 of this section.
4.3.10 JOINTING MATERIALS
1
Sealant jointing: Class to BS EN ISO 11600.
2
Joint sealant: a high performance, low modulus, one-component, moisture curing,
modified polyurethane joint sealant:
3
Joint sealant: Ultra-low-modulus, one-part, neutral-cure silicone sealant that cures
to a durable, fire-resistant, flexible silicone rubber joint seal. It is used for weather
sealing high-movement expansion and control joints.
(a)
A high performance, low modulus, one component, moisture curing modified
polyurethane joint sealant.
4.7
WORKMANSHIP
4.3.10
Design and Performance Requirements
1
Design: complete the design and detailing of the work and provide complete
Production information including fabrication and installation drawings, design
calculations and specifications for claddings, mouldings, fixings and jointing.
2
Integrity: cladding and associated features are to:
(a)
(b)
(c)
Be weathertight under all conditions with full allowance made for deflections
and other movements
Resist all dead and live loads; wind loads are to be calculated in accordance
with BS 6399-2, based on prevailing site conditions
Accommodate without damage all drying shrinkage, creep, deflections and
thermal movements
4.3.11
Manufacturing
1
Manufacturer: submit the name of the proposed cladding manufacturer, with
reference to work of a similar nature carried out on other projects together with
relevant dates and any other information required by the Engineer.
2
Programme: submit proposed programme for the manufacture, including moulding
and curing and delivery of cladding units.
3
Quality of work:
(a)
Manufacture units carefully to ensure compliance with design and
performance requirements, using materials and workmanship appropriate for
the purpose
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 22 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(b)
(c)
4
5
6
Workshop conditions: workshops are to be warm, clean, dry and well ventilated.
Manufacture is to be suspended if the temperature falls below 10 deg. C or if dew
point is reached.
Patterns: inform the Engineer when each master pattern is complete and not less
than 7 days before commencing manufacture of moulds.
Manufacturing accuracy: finished dimensions of completed units are to be such that
the cladding, when erected, complies with the requirements for accuracy of erection,
and all sizes fall within the following permissible deviations:
(a)
7
(b)
(c)
(d)
(e)
9
width and height:
+0; -2 mm
straightness of edges
deviation:
3 mm, any variation to be evenly distributed from
intended line with no sudden bends or
irregularities
flatness
3 mm
Deviation under a 1 m straight edge placed anywhere on a flat panel surface.
Laminating: ensure that:
(a)
8
All materials are to be compatible with each other, and stored and used in
accordance with the manufacturers' recommendations; resins are to be used
as supplied and not adulterated; fillers and admixtures are to be used only
where authorized
Standard of finish is to be appropriate to the end use and position in the
building; ensure that defects such as wrinkling, spotting, striations, fibre
patterning, fish eyes, blisters, crazing, cracking, dry patches and uneven or
inconsistent colour do not occur.
Each GRC skin contains not less than 900 g/m2 of glass fibre, in not less
than 2 layers
Random reinforcement is distributed uniformly, and non-random
reinforcement is correctly positioned and aligned
Each layer of woven fabric reinforcement has a layer of chopped strand mat
on both sides
Glass is fully wetted out by the resin, with a resin to glass ratio of not less
than 2 to 1, higher as appropriate
There is good overall bond between all gel coats and all layers of laminate
The GRC is well consolidated and free from air voids.
Cores, ribs etc: ensure that all core materials, ties, ribs, fixings and accessories are
fully bonded to the GRC skins over the full contact surface area.
Sealing of units:
(a)
Apply a flow coat to all surfaces of the finished units which are not gel coated
thoroughly seal all cut edges, holes etc., to protect the glass fibre from
penetration of moisture.
10
Curing: units are to be adequately cured at not less than 50 deg. C (higher as
necessary) for not less than 8 hours (longer as necessary). Ensure that units are
not distorted whilst being cured.
11
Inspection: completed units are to be carefully inspected and checked by the
manufacturer for match with approved samples and compliance with the
Specification before dispatch to site. Make arrangements with the Engineer for him
to inspect completed units in the shop.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 23 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
4.3.12
1
Erection, Fixing and Jointing
GRC manufacturer is to:
(a)
(b)
2
Protection:
(a)
(b)
(c)
(d)
(e)
(f)
3
(b)
(c)
(d)
(e)
(f)
Erect units using temporary spacers to suit the survey results and ensure
generally consistent joint widths
Within the length of any joint (including in-line continuations across
transverse joints) the greatest width must not exceed the least width by more
than 25%, any variation being evenly distributed with no sudden changes
Offset in elevation between nominally in-line edges across a transverse joint
must not be more than 15% of the width of the transverse joint
Offset in plan or section between flat faces of adjacent panels across any
joint must not be more than 15% of the width of the joint
Widths of joints must be such as to ensure that the joints perform as intended
and are within the recommendations of the joint sealant manufacturer
Finished work must have a satisfactory appearance, being square, regular,
true to line, level and plane with satisfactory fit at all junctions, all to approval.
Final fixing:
(a)
(b)
5
Prevent mechanical damage and disfigurement; separate units during
transport and storage to prevent chaffing; pad all slings, ropes, bearers,
ladders etc.
Support units as necessary so that they do not bow, twist or distort.
Do not cover units with plastics sheeting or stick adhesive tape on exposed
surfaces.
Store fixing and jointing materials indoors.
Do not deliver to site any units which cannot be erected immediately or
unloaded into a suitable well protected storage area.
Before Commencing Erection, survey the structure, including any fixing
inserts. Report to the Engineer immediately if structure will not allow the
required accuracy of erection.
Accuracy of erection:
(a)
4
Provide clear and comprehensive instructions and ensure that they are
understood by site operatives
Provide adequate site supervision by a suitably skilled person.
Obtain approval of appearance of each elevation before tightening fixings or
sealing joints
Tighten threaded fastenings to torque figures recommended by the
manufacturer; do not overtighten restraint fixings intended to permit lateral
movement.
Sealing joints:
(a)
(b)
(c)
(d)
Backing strip, bond breaker and primer are to be types recommended by
sealant manufacturer
Preparation of joint, depth of sealant and application are to be strictly as
sealant manufacturer's recommendations
Joint is to be thoroughly clean, dry and free from oil
Prime, insert backing strip and apply sealant ensuring maximum adhesion to
sides of joint and a neat, smooth and clean finish.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 24 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
6
Damaged units: do not repair without approval; such approval will not be given
where the units are badly damaged or where the proposed repair will impair
appearance or performance. Obtain approval of appearance of all repaired units.
Repairs are to be:
(a)
(a)
(b)
7
Well keyed onto the surrounding cladding using both abrasion and a suitable
chemical primer
Carried out using the same materials as used in the manufacture of the units
Adequately cured, using portable heaters for site curing.
Cleaning down: thoroughly clean down the entire area of the cladding work using
cleaning agents and methods recommended and approved by the manufacturer.
PART 5 TILES
5.1
GENERAL
Add the following paragraphs
Materials
For Material Types, Thicknesses, Finish And Pattern, Refer To Drawings, Finish
Manuals And Legends
Add the following paragraphs
Submittals
Shop Drawings: submit shop drawings showing tile and slab, and base installations,
including but not necessarily limited to the following:
(a)
Plans and elevations showing locations, layouts and patterns.
(b)
Locations, widths and details of expansion, contraction, control and isolation
joints, and division strips in tile/slab substrates and finished tile/slab surfaces.
(c)
Locations and details of waterproofing, underlayment.
Samples:
before placing orders submit samples for approval and selection of colors, finishes
and textures, representative samples of each type and composition of tile and slab
indicated, together with associated trims and accessories. Ensure that delivered
materials match approved samples.
Control Samples:
for each type of tile and slab, and base covering, complete sample areas, being part
of finished work, in approved locations, sizes not less than: 5 m2 for wall areas and
10 m2 for floor areas, including division strips where applicable. Obtain approval of
appearance before proceeding.
(a)
For fully vitrified tiles with low water absorption, make trial samples with the
type of bedding selected and test for proper adhesion.
WARRANTY
1
General Warranty:
The special warranty specified in this Article shall not deprive Employer of other rights
Employer may have under other provisions of the Contract Documents and shall be
in addition to, and run concurrent with, other warranties made by Contractor under
requirements of the Contract Documents.
Special Warranty
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 25 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Provide written guarantee in a form acceptable to the Engineer, signed by Tile
manufacturer, installer and Contractor, undertaking to repair or replace, without
limitations, all or any part of ceramic tiling which fails or becomes defective in
materials or workmanship within specified warranty period. Failure includes, but is not
limited to:
5.2
(a)
Will not fade from sunlight or artificial light.
(b)
Will not chip, crack or show crazing marks
(c)
Will not show wear-through (loss of glaze, where the body of the tile shows
through, due to normal use).
(d)
Will not contain manufacturing defects.
(e)
Warranty Period: (5) years from date of Substantial Completion.
TILE ADHESIVES AND GROUTS
Adhesive Types
Amend 1 to be as follows
Adhesives for fixing glazed wall tiles and floor tiles, and mosaics shall be factory
premixed latex-Portland cement thin bed adhesive to ANSI A118.4 or BS EN 12004,
incorporating SBR latex.
Wet density
ASTM C905
1634 KG/M3
Open Time
ANSI A118.4
50 Minutes
Shear bond Strength
ANSI A118.4/F5.2.4
3.5 MPa
Compressive Strength
ANSI A118.4/F.6.1
34.5 MPa
Hardness
ASTM D2240
50-60
Add the following paragraphs
Adhesive Bedding and Grouting for Tiling and Mosaics: Two part epoxy adhesive for
fixing ceramic wall tiles for interior and exterior locations. Adhesive is to be resistant
to chemicals and to be according to ANSI A118.3 or BS EN 12004.
Mortar Bedding: Bedding Mortar: As specified in Section 13
Sealants; One-Part, Mildew-Resistant Silicone Sealant: ASTM C 920; Type S;
Grade NS; Class 25; Uses NT, G, A, and, as applicable to nonporous joint substrates
indicated, O; formulated with fungicide, intended for sealing interior ceramic tile joints
and other nonporous substrates that are subject to in-service exposures of high
humidity and extreme temperatures.
Grout: Grout for ceramic tiles and slabs are to be proprietary type factory prepared
mixed at site with SBR admixture in accordance with manufacturer's instructions.
Submit samples for selection of colours by the engineer from manufacturer’s standard
range.
5.3
Ceramic Tiles
GENERAL:
Add the following paragraphs
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 26 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
4
Definitions in the ANSI A108, series of tile installation standards and in ANSI A137.1
apply to Work of this Section unless otherwise specified.
5
Ceramic Glazed Mosaic Tile to BS EN 14411 with water absorption E<0.1% shape
and size as indicated in drawings.
6
Porcelain Wall and base Tiles and Fittings
(a)
7
Porcelain Floor Tiles and Fittings
(b)
8
To BSEN 14411, with water absorption E<0.5 %. Tiles are to be fully vitrified
glazed and to sizes as shown on Drawings. Color and finish as indicated in
finish manual, If not indicated Submit samples and catalogues for selection of
colours by the Engineer from manufacturer’s standard range
To BS EN 14411, with water absorption e<0.5 %. Tiles are to be fully vitrified
unglazed acid-resisting with non-slip finish and to sizes as shown on Drawings.
Color and finish as indicated in finish manual, if not indicated, submit samples
and catalogues for selection of colours by the Engineer from manufacturer’s
standard range.
Porcelain type, size, thickness and colour: As indicated in finish manual, and finish
Add the following paragraphs
Skirting
Bed sit-on skirting solid to walls after laying floor tiles and slabs. Ensure joints. In
skirting’s match and align with joints in floor tiling and slabs
5.4
Miscellaneous Materials
Separating Sheet
Polyethylene Sheet 300 microns thick (1200 gauge)
Accessories:
Dividing Strips: 6 mm thick with polished finish. Depth to give secure anchorage into
mortar bedding and to finish to exact level of floor:
(a)
Stainless steel bottom and top-section, for interior and exterior applications
unless otherwise indicated.
Fill
Aggregate Fill: Obtain test certification to confirm engineer’s approval for the
aggregates as follows:
(a)
Tile location.
(b)
Aggregate type.
(c)
Water absorption value and moisture content.
(d)
Organic impurities (fine aggregate only).
Sand for Leveling Course: Sound, sharp, washed, natural sand or crushed stone
complying with gradation requirements in ASTM C 33 for fine aggregate or BS 7533
standard Parts 3, 4 or 7
Underlayment
Acoustic Underlay:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 27 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(a)
Provide heavy-duty acoustic underlayment for impact insulation under floor
finishes on concrete slab where required to achieve impact insulation class
IIC, and other acoustical performances as indicated in acoustic report and
drawings made of closed cell polyethylene foam sheet, blended synthetic
fibres, rubber, vinyl, cork or other approved-type proprietary material; complete
with manufacturer’s standard system including but not limited to adhesive,
fixing system, and accessory -designed to meet or exceed the required impact
sound class as follows:
(b)
The floor constructions in occupied areas should achieve in excess of Rw 60
and are acceptable in reducing any airborne noise in all cases, except for
potentially plant room or special areas spaces as shown below:
(i)
The floor of the plant rooms (technical rooms), above the occupied areas
should be floating floor, and achieve an Rw 70 and an Lnw 38
Submittals
(a)
(b)
Product Data: Manufacturer's data sheets on each product to be used,
including:
(i)
Preparation instructions and recommendations
(ii)
Storage and handling requirements and recommendations.
(iii)
Installation methods.
Shop Drawings: Including but not limited to installation and perimeter details.
Quality Assurance
(a)
A. Product Requirements:
(b)
Anti-Microbial Properties:
(i)
Synthetic fibers that do not support the growth of bacteria and fungus.
(ii)
High temperature manufacturing process to eliminate live organisms.
(iii)
EPA registered anti-microbial agent incorporated to control mold and
bacteria.
(iv)
Flammability: Meets or exceeds Federal Flammability Standard: CPSC
FF 1-70 (Pill Test).
(v)
Flame spread and smoke developed per ASTM E-84 testing:
·
·
·
(vi)
Flame spread: 25, or less
Smoke Developed: 450, or less
Indoor air quality Certified by Scientific Certifications Systems
(SCS),
Minimum thickness: Thickness required to achieve IIC and FIIC ratings
required but not less than 5mm
The system should be field tested for the required FIIC by approved third party.
Test should be performed according with the ASTM E989-06 (site
measurement).or
(c)
Field measurement of sound insulation in buildings and of building elements
In accordance to BS EN ISO 16283-2:2015 Acoustics Part 2: Impact sound
insulation.
Adhesives And Compounds
(a)
Adhesives, primers and the like, where not otherwise specified, are to be types
recommended by manufacturer, or in the absence of such recommendations
types to be approved.
Warranty
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 28 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(a)
Manufacture warranty: 15 Years
PART 9 FLOOR SCREEDS AND TREATMENTS
9.1
GENERAL
References
The following standards are referred to in this part
Add the following
BS 8204-1. Screeds, bases and in situ flooring
Add the following paragraphs
Submittals
Product Data: for each type of manufactured material and product indicated.
Design Mixes: for each concrete topping mix. Include alternative mix designs when
characteristics of materials, project conditions, weather, test results, or other
circumstances warrant adjustments.
Material Test Reports: from a qualified testing agency indicating and interpreting test
results for compliance of materials with requirements indicated, based on
comprehensive testing of current materials:
Material Certificates: signed by manufacturers certifying that each of the following
materials complies with requirements:
(a)
Cementitious materials and aggregates.
(b)
Reinforcement accessories.
(c)
Fiber reinforcement.
(d)
Admixtures.
(e)
Applied finish materials.
(f)
Curing compounds.
Shop Drawings: prepare shop drawings showing proposed patterns, movement joints
and colors indicating utilities and proposed joints.
Installer Certificates: signed by product manufacturer certifying that Installer is
approved, authorized, or licensed by manufacturer to install his products.
Installer Experience: list of five projects (minimum) of a similar nature carried out
successfully by the installer with the same product endorsed by the manufacturer’s
representative.
Quality Assurance
Installer Qualifications: a qualified firm specializing in performing the work of this
Section with minimum three years documented experience and that is approved,
authorized, or licensed by the product manufacturer to install his product and that is
eligible to receive manufacturer's warranty. Include project names and addresses,
names and addresses of Consultants and owners, and other information specified
Coverage Rate: for liquid applied coatings, calculate the quantity of material needed
for the work in accordance with manufacturer’s printed instructions. Submit
calculations for Engineer’s approval. Divide the areas to be coated and allocate the
appropriate quantity of coating material for each area.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 29 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Ready-Mixed Manufacturer Qualifications: manufacturer of ready-mixed concrete
products complying with ASTM C 94 requirements for production facilities and
equipment.
Testing Agency Qualifications: an independent testing agency, acceptable to
authorities having jurisdiction, qualified according to ASTM C 1077 and ASTM E 329
to conduct the testing indicated.
Concrete Testing Service: engage a qualified independent testing agency to perform
material evaluation tests and to design concrete mixes.
MOCKUPS: cast topping mockups to demonstrate typical joints, surface finish,
bonding, texture, tolerances, and standard of workmanship. Confirm with the
following:
(a)
Build mockups approximately 10 sq. m for each pattern, if any, in the location
indicated or, if not indicated, as directed by Engineer.
(b)
Notify Engineer seven days in advance of dates and times when mockups will
be constructed.
(c)
Obtain Engineer's approval of mockups before starting construction.
(d)
If Engineer determines that mockups do not meet requirements, demolish and
remove them from the site and cast others until mockups are approved.
(e)
Maintain mockups during construction in an undisturbed condition as a
standard for judging the completed Work.
(f)
Approved mockups may become part of the completed Work if undisturbed at
time of Substantial Completion.
Materials And Products
Cement for screed and topping mixes is to be ordinary Portland cement to BS EN
197-1 or ASTM C 150 Type 1, unless otherwise specified
Plasticiser: to BS 4887- 1&2 water reducing admixture resulting in high quality
concrete of reduced permeability with increased early strength. Use strictly as per
manufacturer's recommendation.
Admixtures: do not use admixtures other than plasticisers and water-retaining agents
without prior approval. Do not use admixtures of any type with proprietary mixes. Do
not use calcium chloride or any admixtures containing calcium chloride.
Water: to be clean, free from silt, organic matter, alkali, salts and other deleterious
impurities. Obtain approval of source of supply. Test to BS EN 1008.
Bonding Agent: styrene-butadiene co-polymer latex (SBR) for use as a waterproof
bonding agent and admixture. When used as a bonding agent it shall have adequate
pot-life for easy workability. Use strictly as per manufacturer's recommendation.
Separating Sheet: polyethylene sheet 300 microns thick (1200 gauge).
Reinforcement: electrically welded steel wire, 3 mm diameter, 150 * 150 mm mesh,
galvanized after fabrication for screed thickness 100mm and more
Steel Fabric Reinforcement: Used in strips above conduits and pipes which are cast
into screeds and toppings to BS 4483, Reference D49.
Fibrous Reinforcement: 100 % virgin polypropylene, fibrillated fibers containing no
reprocessed olefin materials and specifically manufactured to an optimum gradation
for use as concrete secondary reinforcement with the following properties:
Specific gravity
: 0.91
Tensile strength
: 345 - 758 N/mm2
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 30 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Proportion
strength.
9.2
: not less than 0.9 kg/m3 of concrete to give the required
PREPARATION AND PROCEDURES
Cement And Sand Floor Screeds
Add the following paragraphs
Examine substrates, with Installer present, for conditions affecting performance of
screed. Proceed with application only after unsatisfactory conditions have been
corrected. Verify that base slabs meet finish and surface profile requirements in BS
8204-1.
General Preparation: As applicable, Prepare substrate to receive bonded cementbased screeds in strict accordance with requirements of BS 8204-1
Add the following paragraphs
Cement-Sand Screed Mixes:
Fine aggregate: to BS EN 12620, grading limit C or M
Mix proportions: submit mix for approval to give a 28 day compressive strength of not
less than 20 MPa. Minimum cement sand ratio should be not less than.1:3and 1: 4
by volume as indicated in Part 9/ QCS 2014
Water-cement ratio: adjust ratio to achieve the required compressive strength.
Where the thickness of the screed exceeds 70 mm, use fine concrete if directed.
Submit mix proportions for approval.
Cement –Sand Screed for use in separate construction is to be not less than 50 mm
thick. Add bonding agent and prime substrate surface as recommended by
manufacturer.
LIGHT WEIGHT AGGREGATE SCREED:
Comprising ordinary portland cement and pummice. Not less than 80 mm thick, and
having the following properties:
(a)
Nominal Maximum Aggregate Size
: 0-8 mm
(b)
Bulk Density in dry
(c)
Cement : 200 kg
(d)
Sand content : nill
(e)
Light Weight Aggregate : 1000 lt. or as directed by manufacturer to achieve
specified density, compressive strength and thermal conductivity.
(f)
Concrete Density : 900 kg/m3
(g)
Compressive Strength : > 5 MPa
(h)
Thermal Conductivity : 0.226 W/m deg C
: 700 kg/m3
Polymer Modified Cementitious floor Levelling ( if required )
Polymer-modified, self-leveling product that can be applied in minimum uniform
thicknesses of 1-10 mm and that can be feathered at edges to match adjacent floor
(a)
Compressive strength: >29 N/mm² days (+23°C) according to EN 13892-2
(b)
Flexural Strength: >6 MPa, at 28 days (+20°C)
2levations.
(c)
Application: where required for filling, smoothing and levelling of substrates
before applying textile (carpet) and elastic floor coverings in interior areas.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
according to EN 13892-
S24
Page 31 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Add the following paragraphs
9.4
HIGH-PERFORMANCE COATINGS, GENERAL
General
All paint materials shall have good flowing and brushing properties and shall dry or
cure free of blemishes, sags, air entrapment, etc.
Where required, paints and coatings shall meet flame spread and smoke developed
ratings designated by local authorities.
Equipment
Painting and Decorating Equipment: to best trade standards for type of product and
application.
Spray Painting Equipment: of ample capacity, suited to the type and consistency of
paint or coating being applied and kept clean and in good working order at all times.
Mixing And Tinting:
Unless otherwise specified herein or pre-approved, all paint shall be ready-mixed and
pre-tinted. Re-mix all paint in containers prior to and during application to ensure
break-up of lumps, complete dispersion of settled pigment, and color and gloss
uniformity.
Paste, powder or catalyzed paint mixes shall be mixed in strict accordance with
manufacturer's written instructions.
Where thinner is used, addition shall not exceed paint manufacturer's
recommendations. Do not use kerosene or any such organic solvents to thin waterbased paints.
If required, thin paint for spraying according in strict accordance with paint
manufacturer's instructions. If directions are not on container, obtain instructions in
writing from manufacturer and provide copy of instructions to Consultant.
Material Compatibility
Provide materials for use within each coating system that are compatible with one
another and substrates indicated, under conditions of service and application as
demonstrated by manufacturer, based on testing and field experience.
For each coat in a coating system, provide products recommended in writing by
manufacturers of topcoat for use in coating system and on substrate indicated.
Provide products of same manufacturer for each coat in a coating system.
VOC Content
Products shall comply with VOC limits of authorities having jurisdiction and, for
interior coatings applied at project site, the following VOC limits, exclusive of colorants
added to a tint base, when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
(a)
Flat Paints and Coatings: 50 g/L.
(b)
Non-flat Paints and Coatings: 50 g/L.
(c)
Primers, Sealers, and under coaters: 100 g/L.
(d)
Anti-Corrosive and Anti-Rust Paints Applied to Ferrous Metals: 100 g/L.
(e)
Zinc-Rich Industrial Maintenance Primers: 100 g/L.
(f)
Pre-Treatment Wash Primers: 420 g/L.
(g)
Floor Coatings: 50 g/L.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 32 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(h)
Shellacs, Clear: 730 g/L.
(i)
Shellacs, Pigmented: 550 g/L.
Colors
As selected by Engineer from manufacturer's full range.
Epoxy Coatings
Solvent based two-component 100% solids, high-build, liquid applied, Polyamine,
Cyclo-Aliphatic epoxy, non-slip coating for interior and exterior metal decks and
concrete. Glossy, resistant to abrasion, solvents, fuel and oils. Application by trowel,
roller and spray, and may be touched up by brush. Epoxy coating is not UV stable
and must be top-coated with a pigmented coating if exposed to UV.
(a)
Application for mechanical, electrical rooms and where indicated on Drawings.
(b)
Epoxy coating to have the following physical properties:
Property
Adhesion Strength
Abrasion Resistance
Impact Resistance
Shore D Hardness
Chemical Resistance
Distilled Water (cold)
Distilled Water (hot)
Ethyl Alcohol (50%vol)
Vinegar (3% acetic acid)
Alkali Solution (5%)
Soap solution
Detergent solution
Standard
ASTM D4541-09
ASTM D4060-10
ASTM D2794
ASM D2240-05 (2010)
Method
ASTM D 1308
Physical constants
N/A
Volume, solids %
Flash Point
Specific gravity
Result
2.3N/mm2
106 mg/1000 cycles
0.8 Kg-m
D/37/1
Result
No discoloration, change in
gloss, blistering, softening,
swelling, loss of adhesion or
special phenomena was
observed.
54% ± 2%.
Not less than 26 deg.
Celsius
1.35 Kg/liter
Water-Base Epoxy for Wall Coating up to height as indicated :
(a)
Coating for prepared interior and exterior surfaces. Primarily for abrasion and
chemical resistance, breathable, excellent adhesion to most substrates and
used most often in high traffic commercial, public and moderate to heavy
industrial buildings, but also in some residential applications, with the following
properties:
(i)
Volume solids (mixed): 41 ± 2%.
(ii)
Weight Solids (mixed): 50 ± 2%.
(iii)
Abrasion Resistance: 150 mg loss as per ASTM D4060, CS17 Wheel.
(iv)
Adhesion: 550 psi as per ASTM D4541.
(v)
Corrosion Weathering: Passes as per ASTM D 5894, 15 Cycles, 5040 Hours.
(vi)
Dry Heat Resistance: 121 deg. Celsius.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 33 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(vii)
Flexibility: Passes as per ASTM D522, 180 degree bend, 450 mm.
(viii)
Impact resistance, direct: 11.2 N*m.
(ix)
Impact resistance, indirect: 9 N*m.
(x)
Moisture condensation resistance: passes as per ASTM D4585.
(xi)
Pencil Hardness: H as per ASTM D3363.
(xii)
Salt fog resistance: Passes, ASTM B117, 2000 hours.
Source Quality Control
Testing of Paint Materials:
procedure:
Employer reserves the right to invoke the following
(a)
Engage the services of a qualified testing agency to sample paint materials. If
paint materials have already been delivered to Project site, samples may be
taken at Project site. Samples will be identified, sealed, and certified by testing
agency.
(b)
Testing agency will perform tests for compliance with product requirements.
(c)
Employer may direct Contractor to stop applying paints if test results show
materials being used do not comply with product requirements. Contractor
shall remove noncomplying paint materials from Project site, pay for testing,
and repaint surfaces painted with rejected materials. Contractor will be
required to remove rejected materials from previously painted surfaces if, on
repainting with complying materials, the two paints are incompatible.
Execution
Examination
(a)
Examine substrates and conditions, with Applicator present, for compliance
with requirements for maximum moisture content and other conditions
affecting performance of work.
(i)
Maximum Moisture Content of Substrates: When measured with an
electronic moisture meter as follows:
·
·
·
Concrete: 12 percent.
Masonry (Clay and CMU): 12 percent.
Plaster: 12 percent.
(b)
Plaster Substrates: Verify that plaster is fully cured.
(c)
Verify suitability of substrates, including surface conditions and compatibility
with existing finishes and primers.
(d)
Proceed with coating application only after unsatisfactory conditions have been
corrected.
(i)
Beginning coating application constitutes Contractor’s acceptance of
substrates and conditions.
Preparation
(a)
Comply with manufacturer's written instructions and recommendations in
applicable to substrates indicated.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 34 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(b)
Remove hardware, covers, plates, and similar items already in place that are
not to be painted. If removal is impractical or impossible because of size or
weight of item, provide surface-applied protection before surface preparation
and painting.
(i)
(c)
Clean substrates of substances that could impair bond of coatings, including
dirt, oil, grease, and incompatible paints and encapsulates.
(i)
(d)
Remove incompatible primers and re-prime substrate with compatible
primers as required to produce coating systems indicated.
Concrete Substrates: Remove release agents, curing compounds,
efflorescence, and chalk. Do not coat surfaces if moisture content or alkalinity
of surfaces to be coated exceeds that permitted in manufacturer's written
instructions.
(i)
(e)
After completing painting operations, use workers skilled in the trades
involved to reinstall items that were removed. Remove surface-applied
protection.
Clean surfaces with pressurized water. Use pressure range of 10 350
to 27 580 kPa at 150 to 300 mm.
Abrasive blast clean surfaces to comply with SSPC-SP 7/NACE No. 4, "BrushOff Blast Cleaning."
Application
(a)
Apply high-performance coatings according to manufacturer's written
instructions and recommendations
(i)
Use applicators and techniques suited for coating and substrate
indicated.
(ii)
Coat surfaces behind movable equipment and furniture same as similar
exposed surfaces. Before final installation, coat surfaces behind
permanently fixed equipment or furniture with prime coat only.
(iii)
Coat back sides of access panels, removable or hinged covers, and
similar hinged items to match exposed surfaces.
(iv)
Do not apply coatings over labels of independent testing agencies or
equipment name, identification, performance rating, or nomenclature
plates.
(b)
Tint each undercoat a lighter shade to facilitate identification of each coat if
multiple coats of the same material are to be applied. Tint undercoats to match
color of finish coat, but provide sufficient difference in shade of undercoats to
distinguish each separate coat.
(c)
If undercoats or other conditions show through final coat, apply additional coats
until cured film has a uniform coating finish, color, and appearance.
(d)
Apply coatings to produce surface films without cloudiness, spotting, holidays,
laps, brush marks, runs, sags, ropiness, or other surface imperfections.
Produce sharp glass lines and color breaks.
Field Quality Control
(a)
Dry Film Thickness Testing: Engage the services of a qualified testing and
inspecting agency to inspect and test coatings for dry film thickness.
(i)
Such tests shall be undertaken by a third party QA/QC bodies and / or
testing agencies, as specified for quality control testing and/or third party
inspections, the services of which are to be engaged by the Contractor
at his own costs. Contractor shall touch up and restore coated surfaces
damaged by testing.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 35 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(ii)
If test results show that dry film thickness of applied coating does not
comply with coating manufacturer's written recommendations,
Contractor shall remove noncomplying coating materials from Project
site, apply additional coats as needed to provide dry film thickness that
complies with coating manufacturer's written recommendations.
(iii)
Contractor will be required to remove rejected materials from previously
coated surfaces if, on recoating with complying materials, the two
coatings are incompatible.
Cleaning And Protection
(a)
At end of each workday, remove rubbish, empty cans, rags, and other
discarded materials from Project site.
(b)
After completing coating application, clean spattered surfaces. Remove
spattered coatings by washing, scraping, or other methods. Do not scratch or
damage adjacent finished surfaces.
(c)
Protect work of other trades against damage from coating operation. Correct
damage by cleaning, repairing, replacing, and recoating, as approved by
Engineer, and leave in an undamaged condition.
(d)
At completion of construction activities of other trades, touch up and restore
damaged or defaced coated surfaces.
PART 10 JOINTS, CAULKING AND SEALANTS
10.1
GENERAL
System Description
Add the following paragraph
Trafficable Sealants: in accordance with ASTM C920, trafficable sealants grade T
shall have a hardness reading, after being properly cured, of not less than 25 or more
than 50 when tested in accordance with ASTM C 661 as recommended by ASTM
C920. Do not use silicone sealant in trafficable areas.
(a)
VOC content for single ply roof membrane sealants should not exceed 19 g/L.
(b)
VOC content for architectural porous sealant primers should not exceed 4 g/L.
Add the following paragraphs
Performance Requirements
Provide elastomeric joint sealants that establish and maintain watertight and airtight
continuous joint seals without staining or deteriorating joint substrates.
Submittals
Product Data: For each joint-sealant product indicated.
Shop Drawing: submit manufacturer's installation instructions and shop drawings with
expansion joint cross-section(s) indicating pertinent dimensions, general
construction, component connections, and anchorage methods.
Samples for Initial Selection: Manufacturer's colour charts consisting of strips of
cured sealants showing the full range of colours available for each product exposed
to view.
Product Certificates: Signed by manufacturers of joint sealants certifying that
products furnished comply with requirements and are suitable for the use indicated.
Installer Certificates: Signed by product manufacturer certifying that Installer is
approved, authorized, or licensed by manufacturer to install his products.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 36 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Installer Experience: List of five projects (minimum) of a similar nature carried out
successfully by the installer with the same product endorsed by the manufacturer's
representative.
Compatibility and Adhesion Test Reports: From sealant manufacturer indicating that
the materials forming joint substrates and joint-sealant backings have been tested for
compatibility and adhesion with joint sealants.
Quality Assurance
Installer Qualifications: An experienced installer with minimum of five years
documented experience and who has specialized in installing joint sealants similar in
material, design, and extent to those indicated for this Project and whose work has
resulted in joint-sealant installations with a record of successful in-service
performance. with minimum three years documented experience
Source Limitations: Obtain each type of joint sealant through one source from a
single manufacturer.
Mockups: Before installing joint sealants, apply elastomeric sealants to verify
selections made under sample Submittals and to demonstrate aesthetic effects and
qualities of materials and execution.
Warranty
Installer’s Warranty: Written warranty, signed by Installer agreeing to repair or replace
elastomeric joint sealants that do not comply with performance and other
requirements specified in this Section within Two years from date of Substantial
Completion.
Manufacturer's Warranty: Written warranty, signed by elastomeric sealant
manufacturer agreeing to furnish elastomeric joint sealants to repair or replace those
that do not comply with performance and other requirements specified in this Section
within 10 years from date of Substantial Completion.
Exclusions: warranties specified in this Article exclude deterioration or failure of
elastomeric joint sealants from the following:
10.2
(a)
Movement of the structure resulting in stresses on the sealant exceeding
sealant manufacturer's written specifications for sealant elongation and
compression caused by structural settlement or errors attributable to design or
construction.
(b)
Disintegration of joint substrates from natural causes exceeding design
specifications.
(c)
Mechanical damage caused by individuals, tools, or other outside agents.
(d)
Changes in sealant appearance caused by accumulation of dirt or other
atmospheric contaminants.
MOVEMENT JOINTS IN TILED FLOORS
Add the following paragraphs
10.2.3
Sealants
Multi-Part Non-sag Polyurethane Sealants: chemically curing, elastomeric sealant of
base polymer indicated which complies with ASTM C 920, properties shall be as
follows:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 37 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Type
M
M
M
Grade
NS
NS
NS
Class
25
25
25
Shore
A
20-25
25±5
25±5
Movement
Capability
±50%
±50%
±50%
T
●
Uses
M G
●
●
●
●
NT
●
●
●
●
A
●
●
●
O
●
●
●
Or other equal and approved.
Multi-Part Trafficable Polyurethane Sealants: trafficable chemically curing,
elastomeric sealant of base polymer indicated which complies with ASTM C 920,
properties as follows:
Type
Grade
M
M
M
M
M
NS
P
NS
P
P
Class
25
25
25
25
25
Shore
A
20-25
40±5
25±5
25-30
25-30
Movement
Capability
±50%
±25%
+50%
±25%
±25%
T
●
●
●
●
●
NT
●
●
●
Uses
M G
●
● ●
●
●
●
A
●
●
●
●
●
O
●
●
●
●
●
Or other equal and approved.
One-Part Non-sag Silicone Sealant: neutral curing, elastomeric sealant of base
polymer indicated which complies with ASTM C 920, properties shall be as follows
Typ
Grade
Class
25
Shore
A
15
Movement
Capability
+100 /-50
Uses
T
NT
●
●
S
NS
M
●
S
NS
25
15
+100 /-50
●
S
NS
25
15
+100 /-50
●
S
NS
25
35-40
±25%
●
G
A
●
O
●
●
●
●
●
●
●
●
●
Or other equal and approved.
Color of sealants applied to exposed joints in architectural finishes are to be approved
and selected by the Engineer from manufacturer’s standard range.
Acoustical Sealant: Acoustical Sealant for exposed and concealed joints shall be
manufacturer’s standard non-sag, paintable, non - staining latex sealant complying
with ASTM C 834. It shall be effective in reducing airborne sound transmission
through perimeter joints and openings in building construction as demonstrated by
testing representative assemblies according to ASTM E 90.
Add the following paragraphs
10.6
ARCHITECTURAL JOINT SYSTEMS
Aluminium Extrusions
Material shall conform to ASTM B221; alloy 6005-T5 or 6063-T6.
Backing Cord
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 38 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Closed-cell, polyethylene foam in circular cross section cords to be used in movement
joints as a back-up material and bond breaker for sealants. It is not to be used in
locations subject to direct surface pressure such as floors and water retaining
structures.
Preformed Joint Seal
Cellular neoprene circular section cord sleeved with a water proof self-adhesive
composition.
Divider And Accessory Strips
Divider strips and edging shall be metal or combination of metal and PVC or neoprene
base, designed specifically for flooring applications, in longest lengths available., and
as follows:
(a)
Exposed-Edge Material: As indicated in AI drawings and manual.
(b)
Cross-Section Profile: Angle or L-shape.
(c)
Height: Match stone thickness.
(d)
Width: 6 mm.
(e)
Control-Joint Filler: Neoprene, in color selected by Engineer from
manufacturer's full range.
Fire Barrier
Insert prefabricated fire barrier assemblies that have been tested in accordance with
ASTM E 119BS 476-20 and 22, UL 263 procedures for the rating of two hours unless
indicated otherwise. These fire barriers shall be inserted in joints in slabs and in fire
rated walls. Material is to carry the label of an independent testing laboratory. Fire
barrier assemblies are to include fire barrier and encapsulated insulation.
PART 13 OTHER FLOOR COVERINGS
13.1
GENERAL
Add the following paragraph
RELATED DOCUMENTS
Interior Finish Materials Manual
Add the following paragraphs
13.2
VINYL FLOORING
Vinyl flooring: Tiles and sheets to BS EN 10581:2013 and sizes as shown on
drawings
Action Submittals
(a)
Product Data: For each type of product indicated.
(b)
Shop Drawings: For each type of floor covering. Include floor covering layouts,
locations of seams, edges, columns, doorways, enclosing partitions, built-in
furniture, cabinets, and cutouts.
(i)
(c)
Show details of special patterns.
Installer Certificates: Signed by product manufacturer certifying that Installer is
approved, authorized, or licensed by manufacturer to install his products.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 39 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(d)
Installer Experience: List of five projects (minimum) of a similar nature carried
out successfully by the installer with the same product endorsed by the
manufacturer’s representative.
(e)
Samples for Initial Selection: For each type of floor covering indicated.
(i)
(f)
Samples for Verification: In manufacturer's standard size, but not less than
150-by-230-mm sections of each different color and pattern of floor covering
required.
(i)
(g)
Include similar Samples of installation accessories involving color
selection.
For heat-welding bead, manufacturer's standard-size Samples, but not
less than 230 mm long, of each color required.
Heat-Welded Seam Samples: For each flooring product and welding bead
color and pattern combination required; with seam running lengthwise and in
center of 150-by-230-mm Sample applied to a rigid backing and prepared by
Installer for this Project.
Informational Submittals
(a)
Qualification Data: For Installer.
Closeout Submittals
(a)
Maintenance Data: For floor coverings to include in maintenance manuals.
Maintenance Material Submittals
(a)
Furnish extra materials that match products installed and that are packaged
with protective covering for storage and identified with labels describing
contents.
(i)
Floor Covering: Furnish quantity not less than 3 linear m for every 150
linear m or fraction thereof, in roll form and in full roll width for each color,
pattern, and type of floor covering installed.
Quality Assurance
(a)
Installer Qualifications: A qualified installer who employs workers for this
Project that are competent in heat-welding techniques required by
manufacturer for floor covering installation.
(i)
(b)
Fire-Test-Response Characteristics: As determined by testing identical
products according to ASTM E 648 or NFPA 253 by a qualified testing agency.
(i)
(c)
Engage an installer who employs workers for this Project that are trained
or certified by floor covering manufacturer for heat-welding techniques
required.
Critical Radiant Flux Classification: Class I, not less than 0.45 W/sq.
cm.
Mockups: Apply mockups to verify selections made under sample Submittals
and to demonstrate aesthetic effects and qualities of materials and execution
and to set quality standard for materials and execution.
(i)
Locations of Mockups: As indicated by the Engineer.
(ii)
Extent of Mockups: Approximately 9 sq. m of surface for each product
indicated.
(iii)
Build mockups for floor coverings including resilient base and
accessories.
·
Size: Minimum 9.3 sq. m for each type, color and pattern in
locations directed by Architect.
FINISHES TO BUILDINGS
S24
Page 40 of 64
Q19032-0100D-TD-SPC-AR-01-REV 1
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(iv)
Approved mockups may become part of the completed Work if
undisturbed at time of Substantial Completion.
Warranty
(a)
General Warranty: The special warranty specified in this Article shall not
deprive Employer of other rights Employer may have under other provisions of
the Contract Documents and shall be in addition to, and run concurrent with,
other warranties made by Contractor under requirements of the Contract
Documents.
(i)
(b)
Special Warranty: Provide complete system warranty in which
Manufacturer, Installer, and Contractor are jointly and severally
responsible and agree to repair or replace resilient sheet flooring that
fail in materials, finishes or workmanship within specified warranty
period.
Warranty Period: Three years from date of Substantial Completion.
Delivery, Storage, And Handling
(a)
Store floor coverings and installation materials in dry spaces protected from
the weather, with ambient temperatures maintained within range
recommended by manufacturer, but not less than 10 deg C or more than 32
deg C. Store rolls upright.
Project Conditions
(a)
Maintain temperatures within range recommended by manufacturer, but not
less than 21 deg C or more than 29 deg C, in spaces to receive floor tile during
the following time periods:
(i)
48 hours before installation.
(ii)
During installation.
(iii)
48 hours after installation.
(b)
After postinstallation period, maintain temperatures within range
recommended by manufacturer, but not less than 13 deg C or more than 35
deg C.
(c)
Close spaces to traffic during floor covering installation.
(d)
Close spaces to traffic for 48 hours after floor covering installation.
(e)
Install floor coverings after other finishing operations, including painting, have
been completed.
PRODUCTS
Performance Requirements
(a)
FloorScore Compliance:
Resilient sheet flooring shall comply with
requirements of FloorScore Standard.
Anti-static, Conductive, Solid Vinyl Floor Tile
(a)
ASTM F 1700, Class I (monolithic), Type A (smooth surface).
(b)
Thickness: Not less than 2.0 mm unless otherwise indicated.
(c)
Size: As indicated.
(d)
Seaming Method: Heat welded or as per manufacturer’s standard method.
(e)
Colors and Patterns: As selected by Engineer from full range of industry
colors.
Installation Materials
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 41 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(a)
Trowelable Leveling and Patching Compounds: Latex-modified, portland
cement based or blended hydraulic-cement-based formulation provided or
approved by manufacturer for applications indicated.
(b)
Adhesives: Water-resistant type recommended by manufacturer to suit floor
covering and substrate conditions indicated.
(c)
Integral-Flash-Cove-Base Accessories:
(d)
(i)
Cove Strip: 25-mm radius provided or approved by manufacturer.
(ii)
Cap Strip: Square metal, vinyl, or rubber cap provided or approved by
manufacturer.
(iii)
Corners: Metal inside and outside corners and end stops provided or
approved by manufacturer.
Floor Polish: Provide protective liquid floor polish products as recommended
by manufacturer.
EXECUTION
Examination
(a)
Examine substrates, with Installer present, for compliance with requirements
for installation tolerances, moisture content, and other conditions affecting
performance.
(b)
Verify that finishes of substrates comply with tolerances and other
requirements specified in other Sections and that substrates are free of cracks,
ridges, depressions, scale, and foreign deposits that might interfere with
adhesion of floor coverings.
(c)
Proceed with installation only after unsatisfactory conditions have been
corrected.
Preparation
(a)
Prepare substrates according to manufacturer's written recommendations to
ensure adhesion of floor coverings.
(b)
Concrete Substrates: Prepare according to ASTM F 710.
(i)
Verify that substrates are dry and free of curing compounds, sealers,
and hardeners.
(ii)
Remove substrate coatings and other substances that are incompatible
with adhesives and that contain soap, wax, oil, or silicone, using
mechanical methods recommended by manufacturer. Do not use
solvents.
(iii)
Alkalinity and Adhesion Testing: Perform tests recommended by
manufacturer. Proceed with installation only after substrates pass
testing.
(iv)
Moisture Testing: Perform tests recommended by manufacturer.
Proceed with installation only after substrates pass testing.
(c)
Fill cracks, holes, and depressions in substrates with trowelable leveling and
patching compound and remove bumps and ridges to produce a uniform and
smooth substrate.
(d)
Do not install floor coverings until they are same temperature as space where
they are to be installed.
(i)
(e)
Move floor coverings and installation materials into spaces where they
will be installed at least 48 hours in advance of installation.
Sweep and vacuum clean substrates to be covered by floor coverings
immediately before installation.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 42 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Floor Covering Installation
(a)
Comply with manufacturer's written instructions for installing floor coverings.
(b)
Unroll floor coverings and allow them to stabilize before cutting and fitting.
(c)
Lay out floor coverings as follows:
(i)
Maintain uniformity of floor covering direction.
(ii)
Minimize number of seams; place seams in inconspicuous and lowtraffic areas, at least 152 mm away from parallel joints in floor covering
substrates.
(iii)
Match edges of floor coverings for color shading at seams.
(iv)
Avoid cross seams.
(d)
Scribe and cut floor coverings to butt neatly and tightly to vertical surfaces,
permanent fixtures, and built-in furniture including cabinets, pipes, outlets, and
door frames.
(e)
Extend floor coverings into toe spaces, door reveals, closets, and similar
openings.
(f)
Maintain reference markers, holes, or openings that are in place or marked for
future cutting by repeating on floor coverings as marked on substrates. Use
chalk or other nonpermanent marking device.
(g)
Install floor coverings on covers for telephone and electrical ducts and similar
items in installation areas. Maintain overall continuity of color and pattern
between pieces of floor coverings installed on covers and adjoining floor
covering. Tightly adhere floor covering edges to substrates that abut covers
and to cover perimeters.
(h)
Adhere floor coverings to substrates using a full spread of adhesive applied to
substrate to produce a completed installation without open cracks, voids,
raising and puckering at joints, telegraphing of adhesive spreader marks, and
other surface imperfections.
(i)
Integral-Flash-Cove Base: Cove floor coverings 100 mm unless otherwise
indicated up vertical surfaces. Support floor coverings at horizontal and
vertical junction by cove strip. Butt at top against cap strip.
(i)
Install metal corners at inside and outside corners.
Finishing and Testing Anti-Static Flooring
(a)
Finishing: wash floor using mops dampened with water containing neutral
detergent. If necessary lightly scrub heavily soiled areas using a brush or
synthetic fibre web pad. Thoroughly rinse with clean water and allow to dry.
(b)
Testing: not less than 24 hours after washing, test electrical resistivity in the
presence of the Engineer using equipment and procedures recommended in
BS 2050. Record results and submit to the Engineer.
(c)
Electrical Resistance of anti-static flooring is to be within the following limits
when measured between two separate electrodes placed 600 mm apart:
(d)
(i)
Upper limit: average value not more than 2 megohms and no individual
reading more than 5 megohms
(ii)
Lower limit: average value not less than 50,000 ohms and no individual
reading less than 20,000 ohms.
Marking: supply approved brass plate size approximately 50 ´ 75 mm,
Engraved with the following details and fix in an approved position:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 43 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(i)
The words 'ANTI-STATIC FLOOR'
(ii)
Manufacturer and reference of flooring
(iii)
Name of flooring contractor
(iv)
Date when laid.
Cleaning And Protection
(a)
Comply with manufacturer's written instructions for cleaning and protection of
floor coverings.
(b)
Perform the following operations immediately after completing floor covering
installation:
(i)
Remove adhesive and other blemishes from floor covering surfaces.
(ii)
Sweep and vacuum floor coverings thoroughly.
(iii)
Damp-mop floor coverings to remove marks and soil.
(c)
Protect floor coverings from mars, marks, indentations, and other damage from
construction operations and placement of equipment and fixtures during
remainder of construction period.
(d)
Floor Polish: Remove soil, visible adhesive, and surface blemishes from floor
covering before applying liquid floor polish.
(i)
(e)
Apply two coats, unless otherwise indicated.
Cover floor coverings until Substantial Completion.
PART 14 CEILINGS
14.1
GENERAL DESCRIPTION
General Requirements
Systems are to be fully integrated with the mechanical and electrical installations,
including the provision of additional hangers, framing etc. and are to be supplied
complete with manufacturers' standard edge trims, accessories, connectors, fixing
clips and fixings.
Submittals
Provide co-ordination, fabrication and installation drawings and other information
showing such details of the work as the Engineer may reasonably require.
Submit representative samples of all component materials and products for each of
type suspended ceiling proposed to be used. Obtain approval of appearance and
other characteristics before placing orders. Ensure that delivered materials match
samples.
Control Sample: For each type of ceiling erect control samples for an area of finished
work not less than 10 m2 in an approved location and obtain approval of appearance
before proceeding.
Guarantee
(a)
General Guarantee: The special guarantee specified in this Article shall not
deprive Employer of other rights Employer may have under other provisions of
the Contract Documents and shall be in addition to, and run concurrent with,
other warranties made by Contractor under requirements of the Contract
Documents
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 44 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(b)
Guarantee: Provide complete warranty in which Manufacturer, Contractor and
Installer are jointly and severally responsible and agree to repair or replace
without limitations, all or any part of suspended ceilings that fail in materials,
finishes or workmanship within specified warranty period. Failures include, but
are not limited to, the following:
(i)
Deterioration of metals, metal finishes, and other materials beyond
normal weathering.
(ii)
Discoloration of ceiling tiles or panels
(iii)
Structural failures including, but not limited to, excessive deflection.
(iv)
Warranty Period: Five years from date of Substantial Completion.
Execution
Examination
(a)
Examine substrates, areas, and conditions, including structural framing and
substrates to which acoustical tile ceilings attach or abut, with Installer present,
for compliance with requirements specified in this and other Sections that affect
ceiling installation and anchorage and with requirements for installation
tolerances and other conditions affecting performance of acoustical tile
ceilings.
(b)
Examine acoustical tiles before installation. Reject acoustical tiles that are wet,
moisture damaged, or mold damaged.
(c)
Proceed with installation only after unsatisfactory conditions have been
corrected.
Preparation
(a)
Measure each ceiling area and establish layout of acoustical tiles to balance
border widths at opposite edges of each ceiling. Avoid using less-than-halfwidth tiles at borders, and comply with layout shown on reflected ceiling plans.
Installation, Suspended Acoustical Tile Ceilings
(a)
General: Install acoustical panel ceilings to comply with ASTM C 636/C 636M
and seismic design requirements indicated, according to manufacturer's
written instructions and CISCA's "Ceiling Systems Handbook."
(i)
(b)
Fire-Rated Assembly: Install fire-rated ceiling systems according to
tested fire-rated design.
Suspend ceiling hangers from building's structural members and as follows:
(i)
Install hangers plumb and free from contact with insulation or other
objects within ceiling plenum that are not part of supporting structure or
of ceiling suspension system.
(ii)
Splay hangers only where required and, if permitted with fire-resistancerated ceilings, to miss obstructions; offset resulting horizontal forces by
bracing, countersplaying, or other equally effective means.
(iii)
Where width of ducts and other construction within ceiling plenum
produces hanger spacings that interfere with location of hangers at
spacings required to support standard suspension-system members,
install supplemental suspension members and hangers in form of
trapezes or equivalent devices.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 45 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(iv)
Secure wire hangers to ceiling suspension members and to supports
above with a minimum of three tight turns. Connect hangers directly
either to structures or to inserts, eye screws, or other devices that are
secure and appropriate for substrate and that will not deteriorate or
otherwise fail due to age, corrosion, or elevated temperatures.
(v)
Secure flat, angle, channel, and rod hangers to structure, including
intermediate framing members, by attaching to inserts, eye screws, or
other devices that are secure and appropriate for both the structure to
which hangers are attached and the type of hanger involved. Install
hangers in a manner that will not cause them to deteriorate or fail due
to age, corrosion, or elevated temperatures.
(vi)
Do not support ceilings directly from permanent metal forms or floor
deck. Fasten hangers to cast-in-place hanger inserts, -
(vii)
When steel framing does not permit installation of hanger wires at
spacing required, install carrying channels or other supplemental
support for attachment of hanger wires.
(viii)
Do not attach hangers to steel deck tabs.
(ix)
Do not attach hangers to steel roof deck. Attach hangers to structural
members.
(x)
Space hangers not more than 1200 mm o.c. along each member
supported directly from hangers unless otherwise indicated; provide
hangers not more than 200 mm from ends of each member.
(xi)
Size supplemental suspension members and hangers to support ceiling
loads within performance limits established by referenced standards
and publications.
(c)
Secure bracing wires to ceiling suspension members and to supports with a
minimum of four tight turns. Suspend bracing from building's structural
members as required for hangers without attaching to permanent metal forms,
steel deck, or steel deck tabs. Fasten bracing wires into concrete with cast-inplace or postinstalled anchors.
(d)
Install edge moldings and trim of type indicated at perimeter of acoustical tile
ceiling area and where necessary to conceal edges of acoustical tiles.
(i)
Apply acoustical sealant in a continuous ribbon concealed on back of
vertical legs of moldings before they are installed.
(ii)
Screw attach moldings to substrate at intervals not more than 400 mm
o.c. and not more than 75 mm from ends, leveling with ceiling
suspension system to a tolerance of 3.2 mm in 3.6 m. Miter corners
accurately and connect securely.
(iii)
Do not use exposed fasteners, including pop rivets, on moldings and
trim.
(e)
Install suspension-system runners so they are square and securely interlocked
with one another. Remove and replace dented, bent, or kinked members.
(f)
Arrange directionally patterned acoustical tiles as follows:
(g)
(i)
As indicated on reflected ceiling plans.
(ii)
Install tiles with pattern running in as indicated .
(iii)
Install tiles in a basket-weave pattern.
Install acoustical tiles in coordination with suspension system and exposed
moldings and trim. Place splines or suspension-system flanges into kerfed
edges so tile-to-tile joints are closed by double lap of material.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 46 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(i)
Fit adjoining tile to form flush, tight joints. Scribe and cut tile for accurate
fit at borders and around penetrations through tile.
(ii)
Hold tile field in compression by inserting leaf-type, spring-steel spacers
between tile and moldings, spaced 305 mm o.c.
(iii)
Protect lighting fixtures and air ducts to comply with requirements
indicated for fire-resistance-rated assembly.
Finishes Above Suspended Ceiling
(a)
Apply full coat of plaster to CMU walls and smooth concrete soffits unless
otherwise directed by the Engineer
Field Quality Control
(a)
Special Inspections: Engage a qualified special inspector to perform the
following special inspections:
(i)
Compliance of seismic design.
(b)
Testing Agency: Engage a qualified testing agency to perform tests and
inspections and prepare test reports.
(c)
Perform the following tests and inspections of completed installations of
acoustical tile ceiling hangers and anchors and fasteners in successive stages
and when installation of ceiling suspension systems on each floor has reached
20 percent completion but no tiles have been installed. Do not proceed with
installations of acoustical tile ceiling hangers for the next area until test results
for previously completed installations of acoustical tile ceiling hangers show
compliance with requirements.
(i)
Within each test area, testing agency will select one of every 10 poweractuated fasteners and postinstalled anchors used to attach hangers to
concrete and will test them for 890 N of tension; it will also select one
of every two postinstalled anchors used to attach bracing wires to
concrete and will test them for 1957 N of tension.
(ii)
When testing discovers fasteners and anchors that do not comply with
requirements, testing agency will test those anchors not previously
tested until 20 pass consecutively and then will resume initial testing
frequency.
(d)
Acoustical tile ceiling hangers and anchors and fasteners will be considered
defective if they do not pass tests and inspections.
(e)
Prepare test and inspection reports.
Cleaning
(a)
Clean exposed surfaces of acoustical tile ceilings, including trim and edge
moldings. Comply with manufacturer's written instructions for cleaning and
touchup of minor finish damage. Remove and replace tiles and other ceiling
components that cannot be successfully cleaned and repaired to permanently
eliminate evidence of damage.
WORKMANSHIP
Generally
Suspended ceilings generally: unless otherwise specified, comply with the relevant
recommendations and performance requirements of BS 8290- 1 to 3 for the selection
and assembly of components and materials.
Do not install suspended ceiling material until building is weathertight, wet trades
have finished their work and services are above level of ceiling are complete. Before,
during and after installation maintain temperature and humidity at levels similar to
those which will prevail after building is occupied.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 47 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Before fixing, store ceiling tiles materials on site for at least 48 hours in conditions
similar to those which will prevail after building is occupied. Ensure free circulation
of air to surfaces.
Co-ordinate the work of this Section with that of other trades to ensure that:
(a)
Related works within ceiling voids: electrical and mechanical services,
partitions, fire barriers, fire stopping, painting and the like; are at a suitable
stage of completion to enable ceiling installation to proceed without damage or
disfigurement to the ceiling system
(b)
Fixtures around which the ceiling is to be installed are completed and that
services, fire barriers and the like are in the correct position relative to the
ceiling grid
(c)
Hangers do not press against services or fittings and are installed vertically.
Where obstructions prevent vertical installation ensure that hangers are braced
against lateral movement or provide rigid bridging structures across
obstructions
(d)
Services integrated within the suspended ceiling are positioned accurately,
supported adequately and aligned and levelled in relation to the ceiling tiles
and suspension system.
Erecting Suspended Ceilings
Quality of work: handle, store and fix suspended ceiling materials and accessories in
accordance with manufacturers' recommendations and BS EN 13964, ensuring
compliance with design and performance requirements. Set out accurately to give
level soffits free from undulations and lipping with lines and joints straight and parallel
to walls unless specified otherwise.
Setting out: where not shown otherwise set out ceilings to ensure that edge
tiles/sheets are never less than half in width or length. Position grid to suit tile/sheet
sizes, allowing for permitted deviations from nominal sizes.
Irregular spaces: where surrounding walls or other building elements and features to
which suspended ceiling relate are not square, straight or level obtain instructions on
setting out.
Joints in grid members: position at points of contra flexure unless recommended
otherwise by grid manufacturer or method of jointing is such that grid member acts
as a continuous beam.
Deflection of suspension grid members between supports is to be not more than 3
mm.
Access panels: Lightweight Access Doors and Frames:
(a)
Locations: ceiling surfaces.
(b)
Door: Minimum 0.45-mm- thick, metallic-coated steel sheet with a painted
embossed finish.
(c)
Frame: Minimum 1.1-mm extruded Aluminum with 32-mm- wide rolled flange.
(d)
Hinges: Continuous piano hinge, Aluminum.
(e)
Latch: Screwdriver-operated cam latch.
Openings in suspended ceiling materials are to be formed accurately and neatly to
suit sizes and edge details of fittings, using methods recommended by the
manufacturer and without causing damage or distortion.
Fire Stopping: seal any gaps at junctions of ceiling with walls, cavity barriers, ducts,
pipes, etc., with mineral wool or other approved material to prevent penetration of
smoke and flame.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 48 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Wire hangers: install vertically and ensure that:
(a)
Hangers are carefully straightened before use, installed without bends or kinks
and do not press against any fittings within the void
(b)
Hangers are tied at top and bottom with tight bends to loops to prevent any
vertical movement.
(c)
Protect suspended ceilings from damage and dirt. Ensure ceiling tiles
materials are handled carefully and kept clean if subsequently removed for
access to services, for inspection or remedial work.
14.3
FIXED TYPE SUSPENDED CEILINGS
14.3.1
General Requirements
1
Gypsum board will be used for Fix Type Suspended ceilings where indicated.
2
General: Complying with ASTM C 36/C 36M or ASTM C 1396/C 1396M, as
applicable to type of gypsum board indicated and whichever is more stringent.
3
Regular Type:
(a)
(b)
(c)
(d)
Thickness: 12.5 mm unless otherwise indicated.
Long Edges: Tapered and featured (rounded or beveled) for prefilling.
Pattern: As indicated
Size: As per AI finishes manual.
4
Type: Type X or type H2 with water-resistant and mold resistance properties.
5
Type: Type X or type F where required for fire-resistance-rated assemblies.
14.4
CEMENT BOARD FOR SUSPENDED CEILINGS: Where indicated
Provide Lightweight cement board with dimensions indicated on drawings, made of
Portland cement, sand and expanded polystyrene beads, with a fully embedded alkali
resistant glass fiber mesh facing.
The board shall conform to ANSI A118.9, be free of Free of asbestos, gypsum,
organic fibers or cellulose with square cut ends and tapered longitudinal edges with
the following minimum performance characteristics:
Properties
ASTM Standard
weight
Water absorption
C 948
Humidified deflection (CSA A82.20.3)
Thermal expansion coefficient
Linear variation in humid conditions
Resistance to bacteria
Resistance to fungi
Resistance to wind gusts
Energy contribution (CAN/ULC S-102)
Flame spread (CAN/ULC S-102)
Smoke developed (CAN/ULC S-102)
Impact resistance
Fasteners pull strength
Flexural strength
Maximum thickness
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
D1037
G22
G21
E330
(D 1037, falling weight)
D 1037
C 947
Value
14.2 kg/m2
less than 10% by
weight
0 mm
0.013 mm/C/m
0.05 %
0 (zero growth)
0 (zero growth)
3.6 KPa
0
0
0
no damage
849 N
6.8 Mpa
12,7 mm
S24
Page 49 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(a)
Flexural strength
(b)
Maximum thickness
Property
weight
C 948
less than 10% by weight
Humidified deflection (CSA A82.20.3)
0.013 mm/C/m
D1037
0.05 %
G22
0 (zero growth)
G21
0 (zero growth)
E330
3.6 KPa
(D 1037, falling no damage
weight)
D 1037
849 N
C 947
6.8 Mpa
12,7 mm
Fiberglass mesh and tape shall be made of glass fiber with alkali resistant coating,
according to EIMA 105.01 and minimum coating weight of 14%. Fiberglass mesh vary
from 75 mm wide to 1 m as recommended by manufacturer. It shall conform to ASTM
D-76, ASTM D-5035 and MIL-Y-1140 with the following minimum performance
characteristics:
Property
Value
Minimum tensile strength
Minimum weight
Unitape
Maximum dry elongation
210 dn/5 cm
145 g/m2
self-adhesive
3.9%
Steel framing where required, shall be of hot-dip galvanized metal in conformity with
the requirements of Section S17. Metal thickness shall not be less than 20 gauge,
and flange width not less than 32 mm for fastening boards. Maximum lengths possible
shall be used to conform with dimensions indicated on drawings. Deflection of
assembly shall not exceed L/360.
Fasteners shall be self-tapping, wafer-head screw with the following minimal
requirements:
Property
Diameter of head
Without ribs under head
Underside of head
Chromate-based anti-corrosion
treatment
Salt spray resistance
SO2 resistance (Kesternich test)
ASTM
Standard
B117
-
Value
10.1 mm
flat or with maximum
angle of 15°
with 3 mil thickness
electro-plating
500 hours
5 cycles
Trims to ASTM D1784 norm shall be virgin PVC trims free of lead or plastifying
agents, resistant to ultraviolet rays, resistant to calcium salts, interior and exterior
grade, minimum 6 mm dia holes, maximum spacing 9.5mm o.c.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 50 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Joint finishing compound shall be acrylic-based mortar compound, compatible with
alkaline concrete surfaces and to be mixed with type 10 Portland cement to the
requirements of Section 13 in accordance with manufacturer’s printed instructions
and with the following minimum performance requirements:
Property
Flame spread
Smoke developed
Freeze/Thaw resistance
Adhesive strength
Impermeability
Water absorption
ASTM Standard
(CAN/ULC S102)
(CAN/ULC S102)
C666-A, 50 cycles
(UEAtc 3.2.1.3)
(UEAtc 3.3.1.1)
(UEAtc 3.3.1.2)
Value
5
0
pass
0.23 Mpa
pass
17%
Finish: As indicated ,if not indicated as directed by the Engineer Surface primer shall
be acrylic based with specific plasticizers
Textured coatings shall be acrylic-based coatings, with the following performance
requirements:
Property
Water permeability (UEAtc
Directives for EIFS, Art 3.3.1.1)
Water
absorption
(UEAtc
Directives for EIFS, Art 3.3.1.1)
Salt spray resistance
Accelerated weathering
Mildew & Fungus (MIL-STD810E)
ASTM
Standard
Value
pass
20%
B117
G 53, 2000 hours
pass
pass
no growth
PART 15 RAISED ACCESS FLOORS
15.1
FLOORING
15.2
PERFORMANCE REQUIREMENTS
Seismic Performance: Access flooring shall withstand the effects of earthquake
motions determined according to Structural General Notes.
Structural Performance: Provide access-flooring systems capable of complying with
the following performance requirements according to testing procedures in CISCA's
"Recommended Test Procedures for Access Floors":
Design load per sq.M: 4.9 kN Fire Performance:
(a)
(b)
Surface-Burning Characteristics: Comply with ASTM E 84; testing by a
qualified testing agency. Identify products with appropriate markings of
applicable testing agency.
(i)
Flame-Spread Index: 25 or less.
(ii)
Smoke-Developed Index: 450 or less.
Combustion Characteristics: ASTM E 136.
RAISED ACCESS FLOORS:
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 51 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Access flooring comprising 610 x 610 mm panels supported on adjustable metal
pedestals and supplied complete with manufacturer’s standard ramps, steps, fascias,
railing, bracing and plenum dividers, accessories and fixings. Provide modular panels
interchangeable with other field panels without disturbing adjacent panels or
understructure.
(a)
Attachment to Understructure: Bolted.
(b)
Total System height: As indicated on drawings.
Cementitious-Core Steel Panels: Fabricated from cold-rolled steel sheet, with the
die-cut flat top sheet and die-formed and stiffened bottom pan welded together, and
with metal surfaces protected against corrosion by manufacturer's standard factoryapplied finish. Fully grout internal spaces of completed units with manufacturer's
standard cementitious fill. Floor Panel Covering: Static conductive Homogeneous
poly (vinyl chloride) floor covering (ISO 10581): Factory applied, High-Wear type,
Grade; fabricated in one piece to cover each panel face with integral trim edging.
(i)
Total thickness: 2mm as per ISO 24346.
(ii)
Total weight/m2: 2950g as per ISO 23997.
(iii)
Dimensional stability: ≤ 0.25% for tiles.
(iv)
Reaction to fire: Class Bfl s1 as per EN ISO 13501-1.
Ӌ 8 kW/m2 as per EN ISO 9239-1.
Pass
for
EN ISO 11925-2.
m2
(v)
Thermal resistance: Approx. 0.01
K/W as per EN 12667.
(vi)
Residual indentation: Required value: ≤ 0.10mm, Best measured value:
0.02 mm as per ISO 24343-1.
(vii)
Static electrical discharge: < 2 kV as per EN 1815.
(viii)
Electrical insulation: Ri ӊ 5 x 104 Ohms as per VDE 0100, Part 600.
(ix)
Electrical resistance: R ≤ 109 Ohms as per ESD-approval SP-method
2472.
(x)
Light fastness: ≥ level 7 as per EN ISO 105-B02.
(xi)
Chemical resistance: Good resistance as per ISO 26987.
(xii)
Bacteria resistance: Does not favour growth as per ISO 846:Part C.
(xiii)
Slip resistance: R9 as per DIN 51130.
(xiv)
Seam strength: ≥ 240 N/50 mm as per EN 684.
Loading: access flooring systems, including those with cut-outs, shall be able to
support safely design loads. The following Loads and stresses are minimum. Raised
floor system in each building space shall withstand without failure all expected
equipment loads according to the applications of the building space indicated to have
raised access flooring system
Design load per sq.M., kN
(a)
4.9
With a top-surface deflection under load and a permanent set not to exceed,
respectively, 2.54 and 0.25 mm. However, Contractor is to check above
requirements against approved equipment loads.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 52 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(b)
Stringer Systems: stringer system shall be all steel construction designed and
fabricated to interlock with pedestal head and to form a modular grid pattern
with members under edges of all field floor panels. Stringer shall be snap-on
stringer system.
Fastenings and Fixings:
(a)
Fastenings: to be same metal as item being fixed with matching coating or
finish and supplied by manufacturer of composite item unless otherwise
specified.
(b)
Bolts, Screws and Nuts: to BS 4190.
(c)
Machine Screws and Nuts: to BS 4183, BS EN ISO 1580 & BS EN ISO 7045.
(d)
Self-Tapping Screws: to BS 4174, BS EN ISO 1479 & BS EN ISO 7049.
Accessories
(a)
(b)
(c)
Cut-outs: Provide cut-outs in floor panels for cable penetrations and service
outlets. Provide reinforcement or additional support, if needed, to make panels
with cut-outs comply with standard performance requirements.
(i)
Number, Size, Shape, and Location: As directed by Engineer.
(ii)
Trim edge of cut-outs with manufacturer's standard plastic molding
unless otherwise indicated.
(iii)
Seal cut-outs to comply with manufacturer's requirements.
Diffusers: Manufacturer's standard round diffusers, 203 mm in diameter,
molded from aluminum to produce a removable 1-piece unit complete with
curved-slot helical-throw diffuser, manually adjusted flow regulator, dirt and
dust receptacle, trim ring, and underfloor compression mounting ring; precisely
fitted in factory-prepared openings of standard field panels, and complying with
requirements indicated below:
(i)
Air-Distribution Characteristics: 47 L/s at 24-Pa static pressure and a
maximum noise criterion rating of 15.
(ii)
Structural Performance: Capable of supporting a 8960N concentrated
load.
(iii)
Fire-Response-Test Characteristics: Classified 94V-0 per UL 94.
Floor grilles: Standard load-bearing grilles formed from aluminum to produce
removable one-piece unit precisely fitted in factory-prepared openings of
standard field panels, with adjustable/removable dampers and complying with
the following requirements:
(i)
Air-Distribution Characteristics: 221 L/s at 25-Pa static pressure.
(ii)
Structural Performance: Capable of supporting a 8960concentrated
load.
(iii)
Fire-Performance Characteristics: Classified 94V-0 per UL 94.
(d)
Ramps: Manufacturer's standard ramp construction of width and slope
indicated, but not steeper than 1:12, with raised-disc rubber or vinyl floor
covering, and of same materials, performance, and construction requirements
as access flooring.
(e)
Steps: Provide steps of size and arrangement indicated with floor covering to
match access flooring. Apply nonslip aluminum nosings to treads, unless
otherwise indicated.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 53 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
15.3
(f)
Railings: Standard extruded-aluminum railings, at ramps and open-sided
perimeter of access flooring where indicated. Include handrail, intermediate
rails, posts, brackets, end caps, wall returns, wall and floor flanges, plates, and
anchorages where required. Provide railings that comply with structural
performance requirements specified in Section S17 of the Specifications.
(g)
Panel Lifting Device: Manufacturer's standard portable lifting device of type
required for lifting panels with floor covering provided. Provide four lifting
devices of each type required.
(h)
Perimeter Support: Where indicated, provide manufacturer's standard method
for supporting panel edge and form transition between access flooring and
adjoining floor covering at same level as access flooring.
(i)
Closures: Where under floor cavity is not enclosed by abutting wall or other
construction, provide metal closure plates with manufacturer’s standard finish.
WORKMANSHIP
FIXING
Storage: do not deliver to site materials which cannot be immediately unloaded into
suitable conditions of storage. Unload, handle and store materials to manufacturer's
recommendations.
Protection:
(a)
Prevent distortion of materials during transit, handling and storage.
(b)
Prevent damage to arrises, projecting features and surfaces exposed in
finished work.
(c)
Prevent contact with mud, ashes, plaster and cement.
(d)
Retain protective coverings in place for as long as practicable and keep dry.
Raised Access Floor: install strictly in accordance with manufacturer's instructions to
fulfil specified design and performance requirements. Provide bridgings and bracings
as required and provide additional pedestals to support cut panels. Provide access
covers where required. Install expansion joints, framing around columns and all other
ancillary works as required.
PART 16 STONE COUNTERS
GENERAL
Closeout Submittals
(a)
Maintenance Data: For stone countertops to include in maintenance manuals.
Include product data for stone-care products used or recommended by
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 54 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Installer, and names, addresses, and telephone numbers of local sources for
products.
Quality Assurance
(a)
Fabricator Qualifications: Shop that employs skilled workers who customfabricate stone countertops similar to that required for this Project, and whose
products have a record of successful in-service performance.
(b)
Installer Qualifications: Fabricator of stone countertops.
(c)
Mockup: Build mockup to demonstrate aesthetic effects and to set quality
standards for fabrication and execution.
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
Build mockups in the location and of the size indicated or, if not
indicated, as directed by Engineer.
Notify Engineer seven days in advance of dates and times when
mockups will be fabricated and installed.
Demonstrate the proposed range of aesthetic effects and workmanship.
Obtain Engineer's approval of mockups before starting interior
architectural woodwork fabrication.
Maintain mockups during construction in an undisturbed condition as a
standard for judging the completed Work.
Approved mockups may become part of the completed Work if
undisturbed at time of Substantial Completion.
Build mockup of typical countertop as indicated by the Engineer.
Subject to compliance with requirements, approved mockup may
become part of the completed Work if undisturbed at time of Substantial
Completion.
Preconstruction Testing
(a)
Preconstruction Sealant Adhesion and Compatibility Testing: Submit to jointsealant manufacturers, for compatibility and adhesion testing according to
sealant manufacturer's standard testing methods and part 10 "Joints, Caulking
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 55 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
and sealants” of this section Samples of materials that will contact or affect
joint sealants.
Field Conditions
(a)
Field Measurements: Verify dimensions of construction to receive stone
countertops by field measurements before fabrication and indicate
measurements on Shop Drawings.
MATERIALS
Counters shall be finished with the following:
(a)
Granite:
(i)
(ii)
(iii)
Cut stone from contiguous, matched slabs in which natural markings
occur.
Finish: Match Engineer's sample.
Match Engineer's samples for color, finish, and other stone
characteristics relating to aesthetic effects
Adhesives, Grout, Sealants, And Stone Accessories
(a)
General: Use only adhesives formulated for stone and ceramic tile and that
are recommended by their manufacturer for the application indicated.
(b)
Water-Cleanable Epoxy Grout: ANSI A118.3, chemical-resistant, watercleanable, tile-setting and -grouting epoxy.
(c)
Sealant for Countertops: Manufacturer's standard sealant of characteristics
indicated below and will not stain the stone it is applied to.
(i)
(ii)
(iii)
Mildew-Resistant Joint Sealant: Mildew resistant, single component,
non-sag, neutral curing, silicone.
Joint Sealant: Single component, non-sag, neutral curing, silicone;
Class 25.
Color: As selected by Engineer from manufacturer's full range.
(d)
Stone Joint Splines: Stainless-steel or brass washers approximately 25 mm
in diameter and of thickness to fit snugly in saw-cut kerf in edge of stone units.
(e)
Stone Cleaner: Specifically formulated for stone types, finishes, and
applications indicated, as recommended by stone producer and, if a sealer is
specified, by sealer manufacturer. Do not use cleaning compounds containing
acids, caustics, harsh fillers, or abrasives.
Stone Fabrication, General
(a)
Select stone for intended use to prevent fabricated units from containing
cracks, seams, and starts that could impair structural integrity or function.
(b)
Grade and mark stone for final locations to produce assembled countertop
units with an overall uniform appearance.
(c)
Fabricate stone countertops in sizes and shapes required to comply with
requirements indicated.
(i)
(ii)
(iii)
(iv)
Dress joints straight and at right angle to face unless otherwise
indicated.
Cut and drill sinkages and holes in stone for anchors, supports, and
attachments.
Provide openings, reveals, and similar features as needed to
accommodate adjacent work.
Fabricate molded edges with machines having abrasive shaping wheels
made to reverse contour of edge profile to produce uniform shape
throughout entire length of edge and with precisely formed arris slightly
eased to prevent snipping, and matched at joints between units. Form
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 56 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(v)
(d)
corners of molded edges as indicated with outside corners slightly eased
unless otherwise indicated.
Finish exposed faces of stone to comply with requirements indicated for
finish of each stone type required and to match approved Samples and
mockups. Provide matching finish on exposed edges of countertops,
splashes, and cutouts.
Carefully inspect finished stone units at fabrication plant for compliance with
requirements for appearance, material, and fabrication. Replace defective
units.
Stone Counters
(a)
Nominal Thickness: Provide thickness indicated on drawings.
(b)
Edge Detail: As indicated by the Engineer.
(i)
(ii)
Splashes where indicate, Provide 20-mm- thick backsplashes and end
splashes unless otherwise indicated. Height: As indicated by the
Engineer.
Top-Edge Detail: As indicated by the Engineer.
(c)
Joints: Fabricate countertops and sides
indicated
(d)
Cutouts and Holes where indicated:
(i)
(ii)
(iii)
without joints unless otherwise
Under-counter Fixtures: Make cutouts for under-counter fixtures in shop
using template or pattern furnished by fixture manufacturer. Form
cutouts to smooth, even curves
Counter-Mounted Fixtures where indicated: Prepare countertops in
shop for field cutting openings for counter-mounted fixtures. Mark tops
for cutouts and drill holes at corners of cutout locations. Make corner
holes of largest radius practical.
Fittings where indicated: Drill countertops in shop for plumbing fittings,
under- counter soap dispensers, and similar items
EXECUTION
Examination
(a)
Examine substrates to receive stone countertops and conditions under which
stone countertops will be installed, with Installer present, for compliance with
requirements for installation tolerances and other conditions affecting
performance of stone countertops.
(b)
Prepare written report, endorsed by Installer, listing conditions detrimental to
performance of stone countertops.
(c)
Proceed with installation only after unsatisfactory conditions have been
corrected.
Preparation
(a)
Advise installers of other work about specific requirements for placement of
inserts and similar items to be used by stone countertop Installer for anchoring
stone countertops. Furnish installers of other work with Drawings or templates
showing locations of these items.
(b)
Before installing stone countertops, clean dirty or stained stone surfaces by
removing soil, stains, and foreign materials. Clean stone by thoroughly
scrubbing with fiber brushes and then drenching with clear water. Use only
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 57 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
mild cleaning compounds that contain no caustic or harsh materials or
abrasives. Allow stone to dry before installing.
Construction Tolerances
(a)
Variation from Level: Do not exceed 3 mm in 2400 mm, 6 mm maximum.
(b)
Variation in Joint Width: Do not vary joint thickness more than one-fourth of
nominal joint width.
(c)
Variation in Plane at Joints (Lipping):
between planes of adjacent units.
(d)
Variation in Line of Edge at Joints (Lipping): Do not exceed 0.4-mm difference
between edges of adjacent units, where edge line continues across joint.
Do not exceed 0.4-mm difference
Installation Of Countertops
(a)
General: Install countertops over plywood subtops with full spread of watercleanable epoxy adhesive.
(b)
General: Install countertops by adhering to supports with water-cleanable
epoxy adhesive.
(c)
Do not cut stone in field unless otherwise indicated. If stone countertops or
splashes require additional fabrication not specified to be performed at Project
site, return to fabrication shop for adjustment.
(d)
Do necessary field cutting as stone is set. Use power saws with diamond
blades to cut stone. Cut lines straight, true, and at right angles to finished
surfaces unless beveling is required for clearance. Ease edges slightly to
prevent snipping.
(e)
Set stone to comply with requirements indicated. Shim and adjust stone to
locations indicated, with uniform joints of widths indicated and with edges and
faces aligned according to established relationships and indicated
tolerances. Install anchors and other attachments indicated or necessary to
secure stone countertops in place.
(f)
Bond joints with stone adhesive and draw tight as countertops are set. Mask
areas of countertops adjacent to joints to prevent adhesive smears.
(i)
(ii)
(g)
Install metal splines in kerfs in stone edges at joints where indicated. Fill
kerfs with stone adhesive before inserting splines and remove excess
immediately after adjoining units are drawn into position.
Clamp units to temporary bracing, supports, or each other to ensure that
countertops are properly aligned and joints are of specified width.
Space joints with 1.5-mm gap for filling with sealant. Use temporary shims to
ensure uniform spacing.
(i)
(ii)
Install metal splines in kerfs in stone edges at joints where indicated. Fill
kerfs with sealant before inserting splines and remove excess
immediately after adjoining units are drawn into position.
Clamp units to temporary bracing, supports, or each other to ensure that
countertops are properly aligned and joints are of specified width.
(h)
Complete cutouts not finished in shop. Mask areas of countertops adjacent
to cutouts to prevent damage while cutting. Use power saws with diamond
blades to cut stone. Make cutouts to accurately fit items to be installed, and
at right angles to finished surfaces unless beveling is required for clearance.
Ease edges slightly to prevent snipping.
(i)
Install backsplashes and end splashes by adhering to wall with watercleanable epoxy adhesive and to countertops with stone adhesive. Mask
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 58 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
areas of countertops and splashes adjacent to joints to prevent adhesive
smears.
(j)
Install backsplashes and end splashes by adhering to countertops with stone
adhesive. Mask areas of countertops and splashes adjacent to joints to
prevent adhesive smears. Leave 1.5-mm gap between splashes and wall for
filling with sealant. Use temporary shims to ensure uniform spacing.
(k)
Install backsplashes and end splashes by adhering to wall with watercleanable epoxy adhesive. Leave 1.5-mm gap between countertop and
splashes for filling with sealant. Use temporary shims to ensure uniform
spacing.
(l)
Grout joints to comply with ANSI A108.10. Remove temporary shims before
grouting. Tool grout uniformly and smoothly with plastic tool.
Adjusting And Cleaning
(a)
In-Progress Cleaning: Clean countertops as work progresses.
adhesive, grout, mortar, and sealant smears immediately.
(b)
Remove and replace stone countertops of the following description:
(i)
(ii)
(iii)
(iv)
(v)
Remove
Broken, chipped, stained, or otherwise damaged stone. Stone may be
repaired if methods and results are approved by Engineer.
Defective countertops.
Defective joints, including misaligned joints.
Interior stone countertops and joints not matching approved Samples
and mockups.
Interior stone countertops not complying with other requirements
indicated.
(c)
Replace in a manner that results in stone countertops matching approved
Samples and mockups, complying with other requirements, and showing no
evidence of replacement.
(d)
Clean stone countertops no fewer than six days after completion of
installation, using clean water and soft rags. Do not use wire brushes, acid-
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 59 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
type cleaning agents, cleaning compounds with caustic or harsh fillers, or
other materials or methods that could damage stone.
(e)
Sealer Application: Apply stone sealer to comply with stone producer's and
sealer manufacturer's written instructions.
PART 17 WATER REPELLANT
17.1
PERFORMANCE REQUIREMENTS
General Performance: Water repellents shall meet performance requirements
indicated without failure due to defective manufacture, fabrication, or installation.
(a)
Water Repellents: Comply with performance requirements specified, as
determined by preconstruction testing substrate assemblies representing
those indicated for this Project.
Water Absorption: Minimum 90 percent reduction of water absorption after 24 hours
in comparison of treated and untreated specimens.
(a)
Portland Cement Plaster (Stucco): ASTM D 6532.
Water-Vapor Transmission: Comply with one or both of the following:
(a)
Maximum 10 percent reduction in rate of vapor transmission in comparison of
treated and untreated specimens, according to ASTM E 96/E 96M.
(b)
Minimum 80 percent water-vapor transmission in comparison of treated and
untreated specimens, according to ASTM D 1653.
Water Penetration and Leakage through Masonry: Minimum 90 percent reduction in
leakage rate in comparison of treated and untreated specimens, according to
ASTM E 514.
Durability: Maximum 5 percent loss of water-repellent properties after 2500 hours of
weathering according to ASTM G 154 in comparison to water-repellent-treated
specimens before weathering.
Chloride-Ion Intrusion in Concrete: NCHRP Report 244, Series II tests.
17.2
(a)
Reduction of Water Absorption: 80 percent.
(b)
Reduction in Chloride Content: 80 percent.
PRECONSTRUCTION TESTING
Preconstruction Testing: Installed water repellents shall comply with performance
requirements indicated, as evidenced by reports based on Project-specific
preconstruction testing of existing substrate assemblies by a qualified testing agency.
(a)
Select sizes and configurations of assemblies to adequately demonstrate
capability of water repellents to comply with performance requirements.
(b)
In addition to verifying performance requirements, use test applications to
verify manufacturer's written instructions for application procedure and
optimum rates of product application to substrate assemblies.
(c)
Notify Engineer seven days in advance of the dates and times when
assemblies will be tested.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 60 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
17.3
SUBMITTALS
Product Data: For each type of product indicated.
(a)
Include manufacturer's standard colors.
(b)
Include manufacturer's recommended number of coats for each type of
substrate and spreading rate for each separate coat.
(c)
Printout of current "MPI Approved Products List" for each product category
specified in Part 2 that specifies water repellents approved by MPI, with the
proposed product highlighted.
Field Samples: Engineer will select one representative surface for each substrate to
receive water repellents. Apply water repellent to each substrate, with either partial
or full coverage as directed. Comply with application requirements of this Section.
(a)
Obtain Engineer's approval of field samples before applying water repellents.
(b)
Apply water-repellent to 10 sq. m of wall to demonstrate surface preparation,
and execution quality.
(c)
If Engineer determines mockups do not comply with requirements, reapply
water-repellent until mockups are approved.
(d)
Maintain field samples during construction in an undisturbed condition as a
standard for judging the completed Work.
(e)
Approved mockups may become part of the completed Work if undisturbed at
time of Substantial Completion.
Qualification Data: For qualified Applicator and testing agency. Requirements" and
as supplemented in "Quality Assurance" Article.
Applicator Certificates: Signed by manufacturer certifying that the applicator is
approved, authorized, or licensed by manufacturer to install his products.
Installer Experience: List of five projects (minimum) of a similar nature carried out
successfully by the installer with the same product endorsed by the manufacturer’s
representative.
Product Certificates: For each type of water repellent, from manufacturer.
Preconstruction Testing Reports: For water-repellent-treated substrates.
Field quality-control reports.
Warranty: Special warranty specified in this Section.
17.4
QUALITY ASSURANCE
Applicator Qualifications: A qualified firm specializing in performing the work of this
Section with minimum three years documented experience and that is approved,
authorized, or licensed by the product manufacturer to install his product and that is
eligible to receive manufacturer's warranty. Include project names and addresses,
names and addresses of Engineers and Employers, and other information specified
MPI Standards: Comply with MPI standards indicated.
Mockups: Apply water repellent to each type of substrate required.
(a)
Locate each test application as directed by Engineer.
(b)
Size: As directed by Engineer.
(c)
Final approval by Engineer of water-repellent application will be from test
applications.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 61 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
Preinstallation Conference: Conduct conference at Project site.
17.5
PROJECT CONDITIONS
Limitations: Proceed with application only when the following existing and forecasted
weather and substrate conditions permit water repellents to be applied according to
manufacturers' written instructions and warranty requirements:
17.6
(a)
Revise subparagraphs below for specific material required or if manufacturer
has established different limitations.
(b)
Concrete surfaces and mortar have cured for not less than 28 days.
(c)
Building has been closed in for not less than 30 days before treating wall
assemblies.
(d)
Ambient temperature is above 4.4 deg C and below 37.8 deg C and will
remain so for 24 hours.
(e)
Substrate is not frozen and substrate-surface temperature is above 4.4 deg C
and below 37.8 deg C.
(f)
Rain or snow is not predicted within 24 hours.
(g)
Not less than seven days have passed since surfaces were last wet.
(h)
Windy conditions do not exist that might cause water repellent to be blown
onto vegetation or surfaces not intended to be treated.
WARRANTY
Water Repellents Warranty: Provide complete system warranty in which
Manufacturer Installer and Contractor are jointly and severally responsible and agree
to repair or replace, without limitations, all or any part of the water repellents system
which fails or becomes defective in materials or workmanship within specified
warranty period. Failure includes, but is not limited to: water penetration, deterioration
in coatings; other than due to normal ageing and weathering; and any defects in
adhesion, sealants, and other components of the work.
17.7
(a)
Warranty includes coating, accessories, and other components of water
repellents system.
(b)
Warranty Period: 5 years from date of Substantial Completion.
PENETRATING WATER REPELLENTS
Silane/Siloxane-Blend, Penetrating Water Repellent:
blend with 400 g/L or less of VOCs.
17.8
Clear, silane and siloxane
EXAMINATION
Examine substrates, areas, and conditions, with Applicator present, for compliance
with requirements and conditions affecting performance of the Work.
(a)
Verify that surfaces are clean and dry according to water-repellent
manufacturer's requirements. Check moisture content in three representative
locations by method recommended by manufacturer.
(b)
Inspect for previously applied treatments that may inhibit penetration or
performance of water repellents.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 62 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(c)
Verify that there is no efflorescence or other removable residues that would
be trapped beneath the application of water repellent.
(d)
Verify that required repairs are complete, cured, and dry before applying water
repellent.
Test pH level according to water-repellent manufacturer's written instructions to
ensure chemical bond to silica-containing or siliceous minerals.
Proceed with installation only after unsatisfactory conditions have been corrected.
17.9
PREPARATION
Cleaning: Before application of water repellent, clean substrate of substances that
could impair penetration or performance of product according to water-repellent
manufacturer's written instructions and as follows:
(a)
Portland Cement Plaster: ASTM E 1857.
Protect adjoining work, including mortar and sealant bond surfaces, from spillage or
blow-over of water repellent. Cover adjoining and nearby surfaces of aluminum and
glass if there is the possibility of water repellent being deposited on surfaces. Cover
live vegetation.
Coordination with Mortar Joints: Do not apply water repellent until mortar for joints
adjacent to surfaces receiving water-repellent treatment has been installed and
cured.
Coordination with Sealant Joints: Do not apply water repellent until sealants for joints
adjacent to surfaces receiving water-repellent treatment have been installed and
cured.
(a)
17.10
Water-repellent work may precede sealant application only if sealant adhesion
and compatibility have been tested and verified using substrate, water
repellent, and sealant materials identical to those required.
APPLICATION
Manufacturer's Field Service: Engage a factory-authorized service representative to
inspect the substrate before application of water repellent and to instruct Applicator
on the product and application method to be used.
Apply a heavy-saturation coating of water repellent, on surfaces indicated for
treatment, using 103 kPa- pressure spray with a fan-type spray nozzle to the point
of saturation. Apply coating in dual passes of uniform, overlapping strokes. Remove
excess material; do not allow material to puddle beyond saturation. Comply with
manufacturer's written instructions for application procedure unless otherwise
indicated.Apply a second saturation coating, repeating first application. Comply with
manufacturer's written instructions for limitations on drying time between coats and
after rainstorm wetting of surfaces between coats. Consult manufacturer's technical
representative if written instructions are not applicable to Project conditions.
17.11
FIELD QUALITY CONTROL
Testing of Water-Repellent Material: Employer reserves the right to invoke the
following procedure at any time and as often as Employer deems necessary during
the period when water repellent is being applied:
(a)
Employer will engage the services of a qualified testing agency to sample
water-repellent material being used. Samples of material delivered to Project
site will be taken, identified, sealed, and certified in presence of Contractor.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 63 of 64
Design Consultancy Services for the LA-91 District Cooling
Plant (DCP) At the Pearl Qatar
(b)
Testing agency will perform tests for compliance of water-repellent material
with product requirements.
(c)
Employer may direct Contractor to stop applying water repellents if test results
show material being used does not comply with product requirements.
Contractor shall remove noncomplying material from Project site, pay for
testing, and correct deficiency of surfaces treated with rejected materials, as
approved by Engineer.
Coverage Test: In the presence of Engineer, hose down a dry, repellent-treated
surface to verify complete and uniform product application. A change in surface color
will indicate incomplete application.
17.12
(a)
Notify Engineer seven days in advance of the dates and times when surfaces
will be tested.
(b)
Reapply water repellent until coverage test indicates complete coverage.
CLEANING
Immediately clean water repellent from adjoining surfaces and surfaces soiled or
damaged by water-repellent application as work progresses. Correct damage to work
of other trades caused by water-repellent application, as approved by Engineer.
Comply with manufacturer's written cleaning instructions.
FINISHES TO BUILDINGS
Q19032-0100D-TD-SPC-AR-01-REV 1
S24
Page 64 of 64