CONTENTS
1. INTRODUCTION
II
2. GENERAL NOTES
IV
3.
PRICING PREAMBLE
IX
4. SPECIFICATIONS
XXXI
5. SAMPLE PRELIMINARIES BILL
XLIV
6. B.S.R.
7. BASIC MATERIAL PRICES
1 TO 89
PRICE LIST
P1 TO P29
INTRODUCTION
The Building Schedule of Rates, (abbreviated as B.S.R.) has been prepared based on work
norms generally adopted for Building Construction work with eight hour labour input. The
rates include an over-head and profit margin of 22%. The rates are intended to be adopted in
pricing an Engineering estimate for the Construction, Maintenance or Additions and
Improvements to a Building.
The item description of the B.S.R. has been drafted with a view to directly incorporated in to
a Bill of quantities which in turn will be used as a bidding document for measure and pay
type contract along with specifications, drawings etc.
The Preamble Notes which include General Preamble Notes and Pricing Preamble Notes
indicate the basis upon which the each and every trade item of the B.S.R. has been arrived at;
there fore same preamble notes shall be attached to the B.O.Q. in the event of B.O.Q. items
been derived from the B.S.R. The abbreviations B.S.R. and B.O.Q. has been used inter-alia to
facilitate the same notes been directly adopted to the B.O.Q.
For any clarifications or suggestions please feel free to communication with the DirectorEngineering of the Western Provincial Council on phone/ Fax 2675438 or e-mail
Please
a)
b)
c)
note that each and every B.O.Q. shall consist of the following documents
General Notes
Pricing Preamble
The B.O.Q. it self
Please refer clause 1 of the General notes for the definition of B.O.Q.
Data relating to B.S.R. trade items.
01.
The approved rates for the following trade items listed in the following table are
meant for single storied (Ground floor only) buildings.
Hence, allowances to be made in the rates for lift in respect of work on upper floors.
The percentages indicated in the Table below should be added to obtain the rates
applicable to the upper floors.
Trade Item
Formwork
Plastering
Floor Tiling
Wall Tiling
Roof Calicut Tile
Roof asbestos
Ceiling Works
Painting
Rendering
Block work
02.
Unit
(
s)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
(Sqrs)
First Floor
1%
Second Floor
2%
Third Floor
3%
5%
2%
2%
3%
3%
3%
3%
4%
3%
10%
4%
4%
6%
5%
5%
6%
7%
5%
15%
6%
6%
9%
7%
7%
9%
10%
7%
Following conversion factors should apply for the rates when it is necessary to
convert from the Imperial Units to Metric.
II
Conversion
Imperial to Metric factor (1foot x 0.3048 = metre)
To convert Rate per
Cube
Square
Sq.ft.
L.ft.
03.
20
18
16
Standard Wire Gauge.
SWG
mm
inch
0.914
0.036
1.219
0.048
1.626
0.064
Birmingham Wire Gauge
BWG
mm
inch
0.996
0.0392
1.257
0.0495
1.588
0.0625
Units
To convert
05.
Multiply the Present Rate by
0.353
0.108
10.764
3.281
IRON and STEEL gauge systems
No.
04.
To Rate per
M3
M2
M2
M
“Litres to “Galloons”
“Miles to “Kilometers”
“Kilo to “Pounds”
multiply by
multiply
multiply by
0.2205
1.6090
2.2050
Steel
Dia. Mm
25
20
16
12
10
6
Dia. Inch
1
3/4
5/8
1/2
3/8
1/4
III
Normal Weight
Kg per meter
3.854
2.466
1.579
0.888
0.617
0.222
GENERAL NOTES
1) The preamble notes which include General notes, Pricing Preamble and B.O.Q. are
collectively referred to herein as the Bills Of Quantities and shall jointly constitute the
Bills Of Quantities referred to in the Conditions Of Contract. The specifications and
the Drawings are to be read in conjunction with the Bill Of Quantities.
2) The Bills Of Quantities have been prepared generally in accordance with the
principles laid down in the Method of measurement of Building works (First
Revision) SLS 573:1999 published by Sri Lanka Standards Institution and rates shall
include for everything required for completion of each item of work in accordance
with the specifications and drawings. The relevant clause of this preamble notes shall
be deemed to apply equally to work subsequently ordered for execution by the Bidder,
either under Provisional Sum orders or variation orders, except where specifically
varied therein.
3) The works as executed will be measured for payment in accordance with the method
adopted in the Bill Of Quantities and under the item as therein set forth. The net
measurement or weight of the finished work in place will always be taken, and except
where otherwise stated or where separate items are provided, no allowance will be
made for cutting, waste, laps, circular works, etc., and no deductions will be made for
grout nicks, joggle holes, rounded arises or for shrinkage for fitting ironwork and the
like.
Payment will be made for only those materials, which are specified and permanently
installed in the works to the approval of the Engineer. Construction materials supplied
and delivered to the site by the bidder which become surplus to the requirements of
the works shall become the property of the bidder who shall reimburse the Employer
any money that was paid to the Bidder for the Supply and delivery to the site of the
surplus materials.
4) Unit Rates and extensions shall be given in Sri Lankan Rupees to a maximum of two
significant places of decimals.
5) Inspection of site
Bidders are requested to visit the site to acquaint themselves with all existing
conditions, and with the nature and extend of work to be done under the contract as no
extras will be allowed on the plea of want of information due to neglect of their part
in this regard.
IV
Hence bidders are advised to inspect the site and acquaint themselves regarding the
following in addition to any other information that may be required.
1. Extent and nature of the work to be done
2. Site conditions
3. Storage facilities etc.
4. Transport facilities.
5. Weather conditions in the locality
6. Limitation of working time
7. Transporting and handling materials etc., including security clearances.
6) Type of Contract
The contract shall be a measure and Pay fixed Rate Contract
7) Quality of Materials & General Standards of Works
All materials used in the work shall be the best quality of their respective kinds as
specified in the B.O.Q. , the “Particular Specification” or in the General specifications
(i.e the specifications listed in the bidding document) and shall obtain the same from
manufacturers’ , agents or suppliers approved by the Engineer and shall comply
strictly with the test prescribed herein or in the standard specifications (Both General
or Special). When such specifications or tests are not laid down in the said
specifications the material and works shall comply with the latest issue of the relevant
British Standards or other standards approved by the Engineer.
Where trade names, Brands and/or catalogue numbers are referred to; this is done in
order to establish a standard, quality, or other reference benchmark and sole
preference for any manufacturer is not intended. Similar items may be used, provided
they are equivalent and provided the characteristics of type, quality, appearance,
finish, Method of Construction and/or performance are proved by the Bidder to be not
less than specified and provided also that the approval is first obtained from the
Engineer.
Where the Bidder wishes to use materials or components etc. obtained from
manufacturers other than those mentioned in these specifications or on lists of
approved manufacturers, it shall be incumbent upon him to prove to the complete
satisfaction of the Engineer that the products which he proposes to substitute are equal
in quality and appearance to those mentioned or described in the specifications, and
that the manufacturer is a reputable business of long standing, producing quality
products.
Unless otherwise stated, the cost of the tests required by this specification or the
relevant British or other approved Standards shall be deemed to be including in the
contract sum and rates.
Test certificates covering all materials for which certificates are required and are
supplied for the works shall be submitted to the Engineer for approval.
V
No materials shall be used in the works unless the same has been approved by the
Engineer.
Approval by the Engineer of materials inspected by him or acceptance by the
Engineer of certificates of Tests in lieu of inspection shall vitiate the right of the
Engineer to reject after delivery to site or incorporation in the works, material found
to be unsuitable or not in accordance with this specification.
Before ordering materials of any description, the contractor shall submit, for the
approval of the Engineer the names of the manufacturers or suppliers proposed, and
shall afterwards send to the Engineer, copies in duplicate of the orders placed by the
contractor for the said materials.
8) Units and Extension of Bill Of Quantities
All sizes and quantities have been entered in the Bills Of Quantities in Metric
/Imperials Units. Figures involving decimals, including sums of money are written in
the British tradition, namely, with a full stop in the decimal position and commas
between each successive group of three digits to the left of the decimal position.
9) Rates and Sums to be for Work Complete
Notwithstanding any limits which may be implied by the wording of the individual
items and/or explanation in this preamble it is to be clearly understood by the Bidder
that the rates and sums which he enters in the Bills Of Quantities shall be for the
works finished complete in every respect, he shall be deemed to have taken full
account of all requirements and obligations, where expressed or implied, covered by
all parts of the contract, and to have priced the items herein accordingly. The rates and
sums must therefore include for all incidental and contingent expenses and risks of
every kind necessary to construct. Full allowance shall be made in the rates and/or
sums against the various items in the Bills Of Quantities for all costs involved in the
following inter-alia, which are referred to and/or specified herein except where
separate are provided.
1.
2.
3.
4.
5.
6.
7.
All site investigations, which may be necessary;
All setting Out and Survey work;
Temporary fencing, watching, and lighting;
Paying fees and giving notice to authorities;
Payment of all patent rights and royalties;
Reinstatement of the site;
Safety precautions and all measures to prevent and suppress fire and other
hazards;
8. Interference to the works by persons, vehicles, and the like who may use
the existing facilities;
9. Works in connection with the protection and safety of adjacent structures;
10. Supplying, Maintaining and removing on completion Contractor’s own
accommodation, Offices, stores, workshops, Transport, Welfare services
VI
and all charge in connection therewith; except those for which a separate
BOQ item is provided;
11. Working in the dry except where otherwise permitted by the specification;
12. Maintaining internal roads;
13. The supply, Inspection, sampling and testing of materials and of the works
under construction, including the provision and use of equipment;
14. Except where separate items are provided for bringing construction plant
to the site and removing on completion, for providing, transporting to site,
setting to work operating (including all fuel and consumable stores),
maintaining and removing from the site upon completion all construction
plant and equipment necessary for the execution of the work, including the
cost of all tests and other requirements in respect to such plant and
equipment;
15. The recruitment, bringing to and from the site accommodating and feeding
and all incidental costs and expenses involved in the provision of all
necessary skilled and unskilled labour and supervision, except for whom a
separate BOQ item is provided;
16. All statutory taxes and levy, surcharges etc. including stamp duty payable
on the contract, which will have to be borne by the Bidder.
17. Establishment charges, Overhead Charges and profit.
No claim will be considered for further payment in respect of any work or
method of execution, which may be described in the contract or is inherent in
the construction of the work and detailed on the drawings on account of
1. Any omission from the wording of the items or from a clause in the
preamble or
2. No mention of such work or method of execution having been in the
preamble
10) Rates and Sums to Bear Proper Relation to work Described
The rates and sums entered by the Bidder against all items in the Bills Of Quantities
must bear a proper relationship to the cost of carrying out the work described in the
contract; all on costs and similar charges which are applicable to the contract as a
whole are to be spread over all the rates in the Bills Of Quantities, whilst those which
are applicable only to particular sections of the contract are only to be spread over
items to which these sections refer.
However, the Bidder shall ascertain the exact nature and extent of work to be
performed with reference to the Drawings, Specifications and Conditions of Contract
as the case may be.
11) Provisional Sum Items
Provisional sums will be dealt with as provided for in the Conditions Of Contract.
Provisional sums are represented by the words “Provisional Sum”, or “PS” entered
under the description.
12) “Provisional Quantity” , “Lump Sum” & “ Items”
VII
Certain items in the Bills Of Quantities are designated as “ Provisional Quantities” or
“Lump sum” or merely as an “Item” in the description column.
“Provisional Quantities” may used to indicate that the quantities for the work covered
by such items are “provisional”, or that the provision of such facilities as are
described in the item may not in the event be required under the contract. All items so
designated will be used only at the direction and discretion of the Engineer, and if not
used either wholly or in part shall, as to the amount not used, be deducted from the
Contract Price.
Where such items are designated as of a “Lump Sum” or “Item”, the Bidder shall
enter a lump sum, which shall be the price for the work if executed, as distinct from a
“Provisional Sum” as defined herein. No claim will be entertained in respect of
overhead charges or any other costs, which may allegedly result from the omission of
all, or part of the work covered by such “Provisional Quantity” or “Lump Sum” Items.
13) Day Works Schedules
For a work of a minor or incidental nature for which a realistic rate analysis may not
be possible to arrive at the Engineer may instruct that portion of the work to be
executed on a day works schedule, provided a Day work schedule is included in the
contract.
14) Payment of Items in a Monthly Basis
Payment under items, which are measured on a monthly basis, will not be certified by
the engineer until the facilities described in the items and the Specification has been
provided to the satisfaction of the Engineer. Payment will continue until such time as
the Engineer shall signify that facilities are no longer required.
15) Protection Of Work and Clearing upon Completion
The Bidder shall allow, in his rates, for protection of completed work from
subsequent operations, making good all damage to complete work, for clearing away
all rubbish as it accumulates, and leaving the site in a tidy condition to the satisfaction
of the Engineer.
16) The Unit and Lump Sum prices of the Bill Of Quantities (referred to as the contract
rates) shall, except in so far as is otherwise provided for under the contract, be
deemed to cover all obligations set out in the contract, and all matters or things
necessary for the proper completion and maintenance of the works, and shall be fixed
and binding upon the Bidder.
17) Unit Prices when applied to the quantity of work performed under the contract shall,
and other sums specifically determined under the Provisions of the Contract,
constitute full remuneration to the Bidder under the contract.
18) The quantities set out in the Bill Of Quantities are provisional and cover the
approximate scope of the work which is anticipated that the contractor may be
required to perform. The actual quantities to be used for final measurement purposes
will be determined by the Engineer by measurement of the work completed by the
Bidder.
VIII
19) Abbreviations
Abbreviations used in this Bill Of Quantities denote the following.
Sqr
Square
Ft
Feet
Ft2
Square feet
m
metre
m2
square metre
3
m
cubic metre
mm
milli metre
cm
centi metre
kg
kilogramme
h
hour
Nr
Number (to indicate a quantity)
No.
Number(to indicate an item number, page number etc)
B.O.Q.
Bill Of Quantities
Ele.
Elevation
G.L.
Ground Level
G.W.T.
Ground Water Table
c/c
center to center
@
each
Gr
Grade
Approx
approximately
Thk.
thick
R.C.C.
Reinforced Cement Concrete
M.S.
Mild Steel
T.S.
Tor Steel
R
Mild Steel
Y/T
Tor Steel
C.I.
Cast Iron
W.I.
Wrought Iron
F/w
Formwork
R/F
Reinforcement
Wk
Week
Mon
Month
L.day
Labour day
MM
Man Month
Rs.
Sri Lanka Rupees
Cts.
Cents
IX
PRICING PREAMBLE
Unless otherwise specified in the respective trade sections, the following pricing
preamble from 1 to 30 shall be inclusive for respective trades.
01. Demolition
Rates for Demolition shall include demolishing, dismantling and removing etc. with
the minimum damage to the material in the process of dismantling, temporary
supporting and protecting existing work and adjacent properties against damage, dust
and weather and stacking all serviceable materials as directed and disposal of debris
from site including spraying water periodically to reduce the amount of dust.
All serviceable materials in demolished structures shall be the property of the Client.
Necessary approvals to be taken from suitable authority prior to disposal of
demolished parts.
01. Excavation and Earth Work
Rates for Excavation & Earth Work shall include:
1) Excavation in all Material except Rock
The rate and prices for excavations shall be for all types of material encountered
except rock including ground conditions above or below water level. The Bidder
must make due allowance for the possibility of permission not being granted to
the use of explosives for blasting and other operations.
a) For structures, volume of material excavated measured as a product of the
horizontal area of the base of permanent works to be constructed and the
mean depth below ground level, or measured as the volume to be occupied
by permanent work below ground level, whichever is the greater.
In no case shall any of the following quantities be included in the
measurement for payment.
I.
II.
III.
Quantity outside the vertical planes of neat outline of foundation
structures unless shown otherwise on the drawings.
Quantity of excavation and/or backfill for water supply pipe lines,
sewer pipe lines, and storm drainage except as allowed for in pipe
line construction as specified.
Quantity of any excavation performed prior to the taking of
measurements of the undisturbed natural ground.
X
IV.
V.
Quantity of any material re-handled, except where the drawings
indicate or the Engineer directed the excavation after embankment
has been placed.
Removal of slides, cave-ins, silting or filling due to the action of
the elements or weather and/or carelessness of the Bidder.
b) For unsuitable material, volume of excavated material shall be measured
as volume of material (below base of the permanent works) directed to be
removed by the Engineer.
No allowance is made for bulking or for any extra transport required due to
bulking. The rates shall include, if separate items are not provided but not by
way of limitation for;
a. Excavation to the correct depth and preserving the bottoms of excavations in a
state suitable for the reception of concrete or other foundation work, and no
payment will be made for any concrete any bedding required for filling over
excavated volumes or disturbed areas to the net dimensions as indicated on the
Drawings.
b. Any additional excavation required for shuttering, working space, temporary
or permanent shoring, as subsequent refilling and ramming and disposal of
surplus and back fills behind structures.
c. Provision of storage areas for the temporary storage of any material required
for back filling which cannot be stored alongside the excavation for any
reason, together with the cost of transporting, loading including disposal of
surplus and unloading such material and all other charges incurred in this
respect.
d. Trimming the bottoms of excavations including bottoming to falls and
trimming to sloping surfaces where required or indicated on the Drawings.
e. Taking all precautions by supporting faces of excavation to ensure the safety
of the workmen and to prevent damage to adjacent walls, building and all
other structures and services, including permanent and/or temporary shoring of
trenches.
f. Keeping the site and trenchers and all other excavations free from water from
whatever because arising.
g. For clearing any scrub or other vegetable growth including all trees and for
disposing of the whole of the cleared material to tip provided by the
contractor.
h. All temporary and permanent measures required to protect and support all
existing pipes cables and services, including all chambers, gullies and
foundations thereto, or repair or replace them should they become damaged
due to the contractor’s activities.
i. All barriers, lighting, warning signs and any other measures necessary to
ensure complete safety around the area of works.
XI
j.
Reinstatement except where separate items are included.
2) Excavation in Rock
Excavation in rock, which shall, in all cases, be measured extra over measurement
under 1(a) or 1(b) above by volume from the level at which rock is encountered.
For work described under 1(a) and 1(b), measurement shall be as specified therein
3) Fill
Fill shall be measured as the net volume above ground level of the permanent
earthwork to the detentions shown on the Drawings or ordered by the Engineer,
irrespective of source of material. The rate shall include for selection, handling,
placing, compaction of excavated or imported material and cost of control and
material selecting tests (field and laboratory). Costs incurred in connection with
the remedial work ordered by the Engineer consequent to the results of control
tests falling below the minimum specified shall be borne by the Bidder.
Rate for Hard Earth Filling shall include
1.
Filling in layers, (not more than 1'0") well ramming and consolidating.
2.
The earth shall be free of vegetation, roots, boulders easily decomposable
materials, chemicals, industrial waste, plastic etc.
3.
The maximum size of particle shall not exceed 75mm.
4.
The earth shall be well graded and contain silt and clay (fines) not more
than 30%.
02. Clearing Site
Removal of roots and growth of every description, removing top soil up to a depth of
6" (150mm) and extended up to 10'0" (3 Meter) beyond the outer walls of the
proposed structure and carting away the waste materials from the site where directed.
Existing trees or other plants shall not be removed or cut without instructions from
suitable Authority.
Trees to be retained shall be protected from damage of any sort.
03. Concrete
THE RATES FOR CONCRETE ARE TO INCLUDE FOR
a. All costs incurred in determining the mixes to satisfy the specification(including
any admixtures);
XII
b. Supplying all material (including any admixtures), storing, mixing, transporting,
placing and compaction (whether by hand or vibration);
c. Excavation as required below previously filled levels and back filling (except
where separate items are provided)
d. Roughening the surface of previously executed work as required in order to
provide the necessary bond with new concrete;
e. Achieving specified tolerance;
f. Forming sloping, falls and the like;
g. Forming holes or boxing out for pipes, bolts, frames for covers and other steel
work;
h. Building in cable conduit, pipes, junction boxes etc.
i. Forming 25mm chamfers an all external arises to exposed concrete;
j. Forming all construction joints, keys, stop ends, temporary stops and shuttering of
other than permanently exposes faces( except where separate items are provide)
k. Curing the concrete and all measures to protect freshly poured concrete from
direct sunlight and wave action;
l. Toweling, rubbing down etc. and making good the concrete surfaces to provide
the specified finishes;
m. The cost of control testing throughout the period of concreting and for the testing
of concrete and remedial work ordered by the Engineer consequent to the results
of control tests falling below the minimum specified;
n. Overtime working to maintain continuity of casting;
o. A daily return to the Engineer showing the quantities of cement and the volume of
concrete placed and compacted in position, of each class of concrete in each
section of the works and temporary works.
The measurement of concrete shall be by cubic metre, square metre or linear metre of
completed structure. Where volumetric measure is used, no deductions will be made
for channels, recesses or rebates less than 600mm girth for splays or chamfers less
than 300mm measured on the splay nor for holes or ducts formed in the concrete less
than 1m girth. Fillets less than 300mm on the splay will be measured.
04. Form work
Rates for Form Work shall include, necessary boarding, supporting, erecting, framing,
cutting angles, striking or removal, cleaning and wetting.
Form work is measured in same order as the concrete items.
Form work is measured as the nett contact surface measurement between concrete and
form work.
(a).
(b).
(i).
(ii).
Form work to columns and beams is given as a girth measurements.
Form work for footing, column, beams, lintel, walls, and slabs are of
15mm thick ply-boards.
Slab thickness up to 4", soffit form work should be 3/4" thick
minimum size planks and less than 3/4" thickness is not allowed.
XIII
(iii).
(iv).
(v).
Slab thickness over 4", soffit form work should be of 1" thick
minimum planks sizes and less than 1" thickness is not allowed.
Sides of form work (columns, beams and slabs) 1" thick minimum and
less than 1" thickness is not allowed.
Soffit of form work (beam) 1 1/4" thick minimum less than 1 1/4"
thickness is not allowed.
In case of timber form work the size of material shall comply to 5.2.1.1 and
the size of props and prop interval shall be as 5.2.4.
05. Reinforcement
The rates for steel bar and steel fabric reinforcement shall include for supplying,
transporting, storing, clearing bending, all labour in working, distribution to the
various parts of the works, fixing in position and supporting and for the use of binding
wire and for welding where indicated.
The unit of measurement for steel reinforcement is the Kilogram (kg.) and the weight
of steel has been calculated net with no allowance made for wastage or laps and the
cost of these will be deemed to be covered in the rates.
The weight of steel supports, spacer bars and ties, but including stirrups and binders,
used to locate and hold the reinforcement in place is not included in the quantity and
the cost of these will be deemed to be covered in the rates.
06. Brick Work
Rates for Brick Work shall include rough and fair cutting, plumbing angles, forming
arches, raking out joints, for pointing, plastering etc., cutting and pinning, making
good and sundry items of a like nature.
07. Cement and Sand Hollow Block Work
(a).
(b).
Notes shall be applicable to Cement Sand Hollow Block Work as well.
Cement sand hollow blocks shall conform to SLS 855.
Unless otherwise specified mortar for cement sand hollow block work shall be cement
and sand 1:5.
08. Masonry
(a)
Rates for Masonry shall include all joggles, cramps, dowels, ties, templates,
rough and fair cutting, forming splays, angles, reveals, settings, joining, fixing
in position and pointing including hoisting not exceeding 20'0" above ground
level, protecting and cleaning down.
(b)
Rates shall include for Builder's work in connection with all services and
installations.
09. Structural Steel Work
(a).
Rates for Structural Steel Work shall include shop fabrication work
including cutting, drilling, bolting, riveting, welding, grinding, marking,
delivering, un-loading, hoisting, erecting and fixing in position.
XIV
(b).
Rate shall include for two coats of matt oil paint after treating with a coat of
anti-corrosive paint to all exposed faces of trusses, angles, irons and channels.
(c).
All bolt holes to be machine drilled.
(d).
Steel shall normally be welded by the metal area process conforming to B.S.
5135. Other methods shall be subject to the approval of the authorities.
(e).
Unless otherwise specified all structural steel shall be Grade 43A.
(f).
Structural steel shall conform to BS 4360.
10. Stainless Steel
Type and Quality
All stainless steel for external applications shall be type 316S16 (18% chromium/
10% nickel alloy/ 2.5% molybdenum) austenitic stainless steel cold formed, flat rolled
plate, sheet and strip to BS 1449: Part 2: 1983, and shall agree with requirements of
BS 970: Part 1: 1983.
For internal applications type 304S16 *18% chromium/ 10% nickel alloy) may be
considered as an alternative, at the discretion of the Consultant.
Bars and strips shall be ‘brushed finish’ and sheet to be “embossed” finish in heavy
duty areas e.g. life doors, kicking-plates, elsewhere ‘brushed finish’. Both finishes
being as per samples provided by the Consultant.
Where thin gauge stainless steel is used as a cladding materials, the problem of
kinking or “oil canning” shall be overcome by bonding the sheets to plywood,
(Marine plywood to BS 4079: 1966 for exterior applications), polymetric material, or
by use of stiffening ribs of stainless steel as specified in this Article, at appropriate
positions, bonding to plywood being done using a 2-part epoxy resin adhesive.
All bolted or screwed fixing shall be of stainless steel, or if of other metals to be fully
isolated from the stainless steel by use of nylon or neoprene washers, sheet, etc.
Stainless Steel sheeting shall be 1.25 minimum thickness when bonded to plywood
backing, except in heavy duty applications mentioned above, where 1.5 is the
minimum thickness allowed. Where not bonded to plywood backing 1.5 shall be the
minimum thickness.
Welding
Where stainless steels are welded, this shall be carried out using chromium nickel
austenitic or other compatible electrodes for manual metal are welding to BS 2926:
1984
Care shall be taken to avoid distortion during welding or damage to or discoloration
of surrounding finished surfaces.
All welds shall be carefully ground and polished as required to blend the weld in the
surrounding metal
XV
11. Metal Work
(a).
(b).
Notes in particular specification shall be applicable to Metal Work as well.
Flashing shall be 22 S.W.G. Aluminum
12. Suspended ceilings
The rates for suspended ceiling tiles and panels and the like shall include for
chamfering all cut edges; vertical bulkheads and cutting around light fittings, grills
and diffusers or the like are also deemed to be included.
Rates shall also be deemed to include any depth between the soffit of the slab to
which the ceiling is suspended and the finished level.
All linear shall include for angles, ends and the like.
13. Roof Covering and Roof Plumbing
Rates for Roof Covering shall include laps, straight cutting and waste, nails, screws,
clips rivets, straps and the like including hoisting and fixing complete.
Zinc Alum roofing:
1 Zinc Alum profile sheet (minimum base metal thickness o.4mm and minimum
thickness of 0.47mm.)
2 Zinc Alum gutter (minimum base metal thickness o.4mm and minimum thickness
of 0.47mm.)
3 Zinc Alum down pipes (minimum base metal thickness o.4mm and minimum
thickness of 0.47mm.)
4 Zinc Alum cladding (minimum base metal thickness o.4mm thick)
5 Up channel, 'C' channel and purling galvanized iron
6 material : 55% Aluminum zinc
Al: Aloycoated Az 150, Hitensile (Grade 560) sheet.
Purling - Hitensile - Hitensile strength - 400 mpa (minimum)
Rates for Roof Plumbing shall include solder, rivets, screws, nails, clips, straps,
straight cutting and waste for patterns mould or templates and for all hoisting and
fixing complete with type 400 PVC fittings.
14. Wood Work
No application of any description shall be made on any timber unless and until the
timber is approved by the suitable Authority.
Rates for Carpentry shall include for all cutting, notching, drilling, sinking,
trimming, framing, jointing splayed edges, and like, fixing in position complete with
nails spikes, screws and priming to joints and ends, application of two coats of wood
preservative for all frame works and one coat of wood primer for un-exposed sides of
ceiling boards. Treating roof and ceiling timber (imported timber) in approved kiln.
XVI
All coconut timber shall be matured, selected, swan coconut timber. The finish of
coconut timber shall be mechanically sanded and painted with one coat of sanding
sealer and two coats of polyurethane varnish.
Structural timber for Roof work, ceiling frames
Palu, Wewarana(Ranei), Liyan, Alubo, Pihimbiya.
Imported timber Balau, Kempas, Bitis
Valance board
Ginisapu, Gammalu
Floor Boarding
Teak, Kumbuk, Tina
Timber for Joinery (Doors, Windows, Fan lights etc)
Mahogany, Margosa(Kohomba)
For Frame:
Balau, Thulang, Hadawaka, Milla
For sashes:
Halmilla
a.
All timber shall be seasoned to a moisture content of 12% or less and shall be free of
defects such as end splits, surface cracks, warping, sap wood etc.
b.
If imported timber is to be used, a certificate from the exporter, giving particular of
method of seasoning and preservative treatment along with grade classification shall
be furnished by the Bidder to the Engineer.
c.
All timber sizes indicated in the description shall be finished sizes after planning.
Note on Prescribed timber Sizes
During the past two years, Divisional Engineers have reported that exact imperial
sizes on the timber on following categories are not readily available in the market,
unless logs are being purchased and sawn to the exact size. Contractor's Association
has also made representation indicating that the imperial size specified in the BSR is
not available on imported timber varieties, and due to scarcity of the local timber,
small scale Contractors are unable to purchase logs and seasoned the timber and sawn
to the imperial sizes. Market survey has confirmed the same. Accordingly, it has
been decided to indicate the cross sectional size roof timber in the following manner
to be in par with sectional sizes readly available in the local market, as it may not be
worthwhile to prescribe timber sizes and, then request Contractors to by a large
section and produce it to the required size, since there is no standardization of the
timber imports. This has been done to avoid subjective decision taken by the
Divisional Engineers during the project implementation phase.
Accordingly, the following imperial sizes are being now replaced by the following
Metric sizes.
1” to be replaced by 22mm
2” to be replaced by 45mm
XVII
3” to
4” to
5” to
6” to
7” to
8” to
be replaced
be replaced
be replaced
be replaced
be replaced
be replaced
by 70mm
by 94mm
by 117mm
by 140mm
by 165mm
by 190mm.
Hence, timber will now be prescribed as
2"x 1" as 45mmx22mm
2”x 2” as 45mm x 45mm
4”x 2” as 94mm x 45mm
5”x 2” as 117mm x 45mm
5”x 3” as 117mm x 70mm
4”x 3” as 94mm x 70mm
6”x 2” as 140mm x 94mm
6”x 3” as 140mm x 70mm
6”x 4” as 140mm x 94mm
8”x 4” as 190mm x 94mm
Rates for Joinery shall include:
(a).
(b).
(c).
All labour in framing, jointing and fixing in position complete with all nails,
spikes, screws etc.
Application of one coat of hot tar to the surfaces come in contact with brick or
concrete.
Application of one coat of wood primer for un-exposed surfaces.
Unless otherwise specified door, window, fanlight and other frames shall be
3 3/4" x 2 3/4" (finished size) in section and out of Jak, Milla or Mahogany. Sashes
and counter tops shall be 1" thick (finished size) out of "Jak" or "Mahogany".
Valance, barge boards and valley gutter boarding shall be 1" thick Ginisapu. Brass
screws shall be used for all fittings.
All exposed faces of timber in Joinery are to be wrote the sizes given below are
nominal without allowance for planning, except where described as finished sizes.
15. Ironmongery
Rates for Ironmongery shall include all fittings, cutting, sinking, boring, mortising
and the like and fixing complete including supplying matching screws.
(a)
(b)
Unless otherwise stated, all fittings shall be polished brass with oxidized
finish, heavy quality type and make of the lock shall be "Union" or "Yale".
Brass Fitting & Furniture
For doors, windows, cupboards etc. shall be of heavy type oxidized brass
fittings to approved samples, hinges shall have steel pins with the ends
welded.
XVIII
(c).
Parliamentary Hinges, Brass
Size A x B 2 1/2"x 3 1/2", 3 1/2"x 4", 4"x 4 1/2", 4 1/2"x 5"
Weight per pair 14 Ozs. 1lb., 2 Ozs.1lb. 5 Ozs. 1lb., 11Ozs.
Diameter of pin 0.170", 0.170", 0.184", 0.184"
(d).
Butt Hinges
Size A x B 4"x 2 1/2", 4"x 3", 5"x 2 1/2", 5"x 3"
Weight per pin 1ib. 1 Pzs., 1lb. 3)zs., 1 lb. 7 Ozs. 1 lb. 12 Ozs.
Diameter of pin 0.184", 0.184", 0.184", 0.1184"
(e).
Casement Stays
Size 10" straight 10" curved 12" straight 12" curved
Channel type
9 Ozs.
10 Ozs. 12 Ozs. 14 Ozs.
10 Ozs.
11 )zs. 14 Ozs. 17 Ozs.
(f).
Bolts
The handles of bolts shall be cast in one piece with the shoot which shall be
not less than 3/10" dia. for bolts 6" and above and not less than 5/16" for
smaller bolts.
The distance of travel of the shoot shall not be less than 1 1/4" in the case of
bolts 6" and above.
16. Sanitary Fittings and Plumbing
The whole of the sanitary works shall be carried out by a licensed sanitary plumber
according to the layout and as specified and as directed at site. It should be noted that
the positions shown on plans are approximate. Exact positions would be indicated at
site.
All plumbing fixtures and fittings should be approved by the Architect, Engineer prior
to ordering same for installation.
All items of pipes, specials and fittings shall be suitable for sewerage works purposes
and for use with raw domestic sewage and installation and operation in a damp
tropical climate with temperature between 200C to 400C and relative humidity of
80%
(a).
Unless otherwise specified rate for wash basin shall include 22"x 15" overall
white vitreous China wash basin conformed to SLS 229, leaflet or approved
equivalent with 1/2" dia. Chromium plated pillar tap, 1 1/4" dia. rubber plug,
Chromium plated chain waste and brackets in painted iron, screwed to plastic
rawl plugs buried in wall. Water supply and waste water connections all fixed
complete to working order.
XIX
(b).
Unless otherwise specified rate for low level closet shall include white
Vitreous China, low level closet conformed to SLS 229, leaflet or approved
equivalent comprising closet with 'P' or 'S' trap as directed and hinged seat
with lid in black plastic all fixed complete to working order.
(c).
Unless otherwise specified rate for low level cistern shall include White
Vitreous China, low level cistern conformed to SLS 229, leaflet or approved
equivalent comprising shell and cover with supporting brackets screwed to
plastic rawl plugs buried in wall. Water supply and discharge connections all
complete to working order.
(d).
Unless otherwise specified rate for Eastern Closet shall include ( 21 1/2"x 15
1/2") overall White Vitreous China closet as per Model No, 1001 as detailed
in Ceylon Ceramic Ltd. leaflet or approved equivalent 'P' or 'S' trap as directed
and foot rest in cement concrete 1:2:4 (3/4") rendered with grooved in cement
and sand 1:2 fixed complete to working order.
Unless otherwise specified rate for high level cistern shall include plastic
cistern of approved manufacture comprising shell and cover with supporting
brackets screwed to plastic rawl plugs buried in wall PVC flush bend and all
other necessary accessories with supply and discharge connections all
complete to working order.
Unless otherwise specified rate for Mirror above wash basin plate glass mirror
of super quality free from effect of wavy image with fiberglass frame fixed to
wall with plastic rawl plugs and chromium plated brass screws.
(e).
(f).
Rates for sanitary fittings shall include for:
a. Fittings such as taps, waste water outlets, flushing cisterns, flush valves,
internal overflows etc., the supporting brackets and incidental materials for
fixing.
b. Assembling, joining together, fixing component and jointing to pipes inclusive
for necessary couplings and for leaving perfectly clean undamaged and perfect
working order as on completion.
c. Jointing and connecting pipes to sanitary fittings.
d. Testing and commissioning of installation.
e. Making good the work disturbed
(g).
Rate for Sanitary Plumbing shall include:
(1)
(2)
Screws, nails, pipe hooks, saddles, brackets, sockets, connections,
short lengths, back nuts, nipples, all laps, straight cutting and waste.
All excavations, supports to sides of trenches, if necessary keeping
trenches free from water, back filling, disposal of surplus soil, all
jointing and other incidental materials and testing upon completion.
Unless otherwise stated, PVC piping for water service and waste water etc. shall be
rated to Type 1000 PVC such plastic piping and fittings shall comply with the SLS
147 or latest BSS.
XX
Copper piping shall be used for hot water service and such copper piping and fittings
shall comply with the latest BSS specification.
Unless otherwise stated separately in the BOQ, any special water supply and drainage
fittings such as bends, tees, reducers etc. shall be deemed to have been included in the
relevant items, and such items should accordingly be rated to include for such specials
etc. and for any extra work involved for the satisfactory completion of such items
17. Water Supply
The Bidder is to pressure test pipes after fixing taps and stop cocks and fittings prior
to concealing, under the supervision of the Engineer or his representative.
The contractor shall provide the Engineer with the manufacturers’ certificates of the
standards, quality of the materials before commencing the works
All water pumps should be mounted on inertia bases fitted with anti-vibration
mountings. Flexible connections should be provided on connections between pump
units and pipe work.
Where pipes pass through walls or slabs these shall be wrapped with a layer of insert
material. For pipes exceeding 50mm dia. sleeve pipes shall be used for the full
thickness of the slab walls, beams, retaining walls through which the pipe passes.
All taps, shower appliances, cocks and floor waste covers, used in the plumbing
installation shall be chromium plated brass (CP brass) or stainless steel item unless
otherwise stated.
Rates for Water Supply Plumbing work shall include:
a. Cutting and waste of pipes etc., and jointing of pipes.
b. All specials such as elbows, bends, tees, junctions, plugs, reducers and similar pipe
fittings except for valves which would be measured separately.
c. Connecting pipes to sanitary fixtures and appliances.
d. Chasing to brick or concrete walls, columns, beams etc., and making good all
works disturbed.
e. Necessary screws, nails, sockets, connection back nuts, standard pipe fixing or
supporting clips, saddles, brackets, racks, straps etc.
f. Connecting different type of pipes.
g. Testing and disinfecting after completion.
h. Preparing and making applications and giving notice to the relevant authorities to
obtain service connections to the building inclusive of any statutory payments to
relevant statutory authorities.
All cold water piping should be provided with flexible connections in pipe work and
provided with the required pipe supports & anchoring as per the manufacturer’s
specifications.
18. Drainage
Unless otherwise specified, pipes in Drainage shall be Type 600 PVC.
XXI
Rate for Drainage Work shall include for:
a. Excavation, backfilling, Planking & strutting, dewatering and disposal for surplus
spoil.
b. Laying of pipe to falls and gradient and all jointing and other incidental materials.
c. All pipe specials such as bends, tees, junctions, elbows, etc.
d. Connection to sides of manholes etc.
e. Providing sleeves etc., when pipes pass through walls, foundations etc.
f. Giving notices, obtaining permits, paying fees etc.
g. Testing installation as specified in specifications, and/or American, British or Sri
Lankan standards.
19. Plastering
Rates for Plastering shall include for all temporary rules, screeds, grounds etc. for
raking out joints of new brick work, or hacking new concrete for key, internal and
coved angles, joints between different surfaces and between new and old plastering,
arisers, quicks intersection between curved or irregular surfaces etc. and making good
around pipes, sanitary fittings and similar fixtures.
Unless otherwise stated internal wall plaster shall be 5/8" thick in cement, lime and
sand 1:1:5 finished smooth with lime putty.
Unless otherwise stated external wall plaster shall be 5/8" thick in cement, lime and
sand 1:1:5 finished semi-rough.
Unless otherwise stated plinth plaster shall be 5/8" thick in cement and sand 1:3
finished smooth with neat cement floating.
Unless otherwise stated Soffit plaster shall be 3/8" thick in cement and sand 1:3
finished smooth with lime putty.
20. Paving
Rates for paving shall include all temporary rules, screeds, ground etc. all normal
cutting arisers, rounded angles and the like bedding and point making good between
different surfaces and around pipes, sanitary fittings and other fixtures and cleaning
down upon completion including curing.
Unless otherwise stated Cement rendering shall be 1/2" thick in cement and sand 1:3
finished smooth with thick coat of colored pigment mixed neat cement floating and
smooth with Caberendum stone.
Unless otherwise stated skirting shall be 4" high (100mm high) 1/2" thick (12mm
thick) in cement and sand 1:3 laid with the floor rendering, finished smooth with a
sunk bed of junction of the skirting with the plaster above the angle between the floor
and the skirting to be rounded off to a radius of one Inch.
21. Tiling
Tile should comply with European standard specification LEN 177.
Industrial grade (heavy duty) vitreous ceramic floor tile shall be homogeneous.
XXII
The tiles manufactured by European standards and are of colored as specified by an
Architect.
Rates for tile work shall include the cost of cement and sand 1:3 screed, pointing
joints with neat cement of tile grout to match the color of tiles.
Unless otherwise stated floor tile paving shall be any size non-skid pattern ceramic
floor tiles of approved local manufacture, bedded with cement and sand 1:3 1/2" thick
screed.
Unless otherwise stated wall tiling shall be any size glazed ceramic wall tiles of
approved local manufacture fixed on cement and sand 1:3 backing 3/8" thick.
Approval of floor and wall tiles colour to be obtained from suitable authority.
All floor tiles shall be locally produced ceramic tiles and shall agree in colour,
dimensions, tolerances, finishes, and quality with samples provided by the consultant.
All tiles to be true to shape, uniform in size and free from blemishes.
The recommendations of C.P.202 and BS 5385: part 3, shall be complied with,
subject to any qualifications hereunder.
Preparation
The sub –floors to be cleaned of cement film, mortar spills, paint and other impurities,
oil sports to be chiseled. The sub-floor is to be well wetted with water
Everything necessary shall be done to obtain a satisfactory bond between concrete,
screeds, beddings and finishes.
The cleaned sub-floor shall be grouted with a 1:1 cement/water mixture by broom
application, prior to placing the mortar bed
Setting-out
Corrected floor levels shall be established and finished levels of tiling controlled by a
series of spot levels.
Movement joint in sub-floors and screeds shall be carried up into tiling.
Generally the tiles shall be divided symmetrically over the areas, so that pieces
smaller than half a tile will not occur; the layout of the tilling and width of joints to be
determined with the consultant.
The tilling to be laid to falls, towards floor gullies as shown on the drawings, and/or in
co-ordination with the consultant.
At joints to walls, skirtings, pits, passages etc., the to be cut, sawn or ground to size.
Bedding of Tiles
Care shall be taken that tiles are well soaked in clean water and are free of dust before
laying.
A mortar bed of 1 part cement to 3 parts sand, of thickness as specified in the Bill Of
Quantity to be spread by means of a float in beds of a width of approx. 700 and
allowed to stiffen. Acid proof mortar for acid-proof tiles is to be applied in
accordance with the manufacturer’s instructions.
XXIII
The back of the tiles shall be buttered with a coat of cement slurry and the tiles laid
with straight joints 3mm wide, on the mortar bed.
Grouting shall take place at any time after tiles are firmly fixed but before any dirt or
contamination can enter the joints.
Dampen the joints and grout with cement: fine sand(1:1). Do not use more water
necessary to avoid subsequent joint shrinkage work the grout well into the joint
flush and remove surplus grout. At the discretion of the consultant, tinted grout
be used. Grouting for acid-proof tiles is to be applied in accordance
manufacturer’s instruction.
than
until
shall
with
If a depression or bump in surface level in excess of 6mm in any 2 meter length is
found, then the floor shall be taken up and re-laid, at the contractor’s expense, to the
satisfaction of the Consultant.
Protection
Finished tiled floors are completely covered with sheets of hardboard; walls and
skirting to be washed with soap and water, the floor to be similarly treated after
removal of temporary floor coverings.
22. Painting
Rates for Painting shall include preparation of surfaces, cleaning down, smoothing,
knotting, stopping etc., protection of floors and fittings, removing and replacing door
and window furniture and cleaning doors and windows upon completion.
Unless otherwise specified internal wall paint shall be one coat of Alkali Resistant
Primer and two coats of Emulsion paint of approved make and colour.
Unless otherwise specified external wall paint shall be one coat of Alkali Resistant
Primer and two coats of Weather shield Emulsion paint of approved make and colour.
Unless otherwise specified paint for wooden surfaces shall be one coat of aluminum
primer and two coats of Enamel paint of approved make and colour.
Spray painting shall do in ICTAD SCA/4/1 clause 14.9(f).
23. Glazing
Unless otherwise specified, thickness of glass panes shall be not less than 4.0mm and
rates for Glazing shall include waste in cutting to required sizes, brass pins, screws,
"Teak' or 'Halmilla' beads, fixed complete and protecting.
24. Electrical Installation
Unless otherwise specified internal lighting wiring shall comply with the drawings
and shall be in full PVC insulated copper cables. All conduits shall be buried into
brick walls, slabs, beams or columns to the entire satisfaction of the Engineer. All
switches and socket outlets shall be "Tenby", M.K., Clipsal or similar approved sunk
type unless otherwise specified. All fluorescent fittings should be complete with good
quality power factor correcting capacitor and choke, starter etc. and the tube should be
"Thorn", "Philips" of good quality of similar approved make. All fans and regulators
XXIV
shall be "National", "Hitachi", "KDK", or similar approved make to approved colour.
Rate to include for all necessary PVC switch boxes, plugs, round or square blocks.
Chromium plated chains, brass hooks, ceiling roses, holders (Angle batten and
ordinary battens) and any other item necessary, whole installation shall be carried out
according to CEB/IEE regulations. All other distribution boards should be Merlin
Gerin flush mounting type or similar approved type. Switch gears shall be MEM or
similar approved type. Earth leakage circuit breakers shall be Cabtree, Fugi or
approved make, MCCB's and MCB's shall be "Square D" or similar approved make.
Unless otherwise specified wiring shall be as follows :
All lamp points wired through a 5 Amp. Sunk switch using 2x1x1/1.13 PVC insulated
copper wire and 1x1x7/0.67 PVC insulated copper earth wire in concealed PVC
conduits.
Ceiling fan points wired through regulator using 2x1x1/1.13 PVC insulated copper
wire and 1x1x7/0.67 PVC insulated copper earth wire in concealed PVC conduits.
All flush mounted 5 Amp. Switched socket outlets wired using 2x1x1/1.13 PVC
insulated copper wire and 1x1x7/0.67 PVC insulated copper earth wire in concealed
PVC conduits.
All flush mounted 15Amp. Switched socket outlet wired using 2x1x7/0.67 PVC
insulated copper wire and 1x1x7/0.67 PVC insulated copper earth wire in concealed
PVC conduits.
General Specification - Electrical Installations
1.0
1.1
General
(a).
Work shall be carried out in conformity with the regulations for electrical
equipment in buildings issued by the I.E.E. London ICTAD Specifications and
any other relevant C.E.B. Regulations.
(b).
All materials and equipment used shall conform to the relevant current B.S.
Specifications, Sri Lanka Standard Specification or any other Internationally
recognized Specification not less rigid.
(c).
The rate quoted for wiring per point, shall provide for the supplying and
installation of all materials necessary for the complete wiring of that point
from the Distribution Board onwards, exclusive of the cost of supplying and
installing Distribution Board, Lamps and Shades but will include all other
materials in the sub-circuit wiring.
Wiring Points
1.1 1
A Pendant point will include :(a).
(b).
(c).
(d).
Cord grip suspension lamp holder
Flexible 2 core cord upto 1.5m in length.
Ceiling rose on square or round, Teak or Halmilla base.
Associated casings and covers except for the runs as defined in Item
1.2.5.
XXV
(e).
(f).
1.1.2
A Batten Point will include :(a).
(b).
(c).
(d).
1.1.3
(b).
(c).
(d).
(c).
(d).
(e).
A ceiling rose on a square or round Teak or Halmilla base.
A 200mm x 150mm Teak or Halmilla base on which the regulator to
be mounted.
An earth continuity conductor for earthing of the regulator, where
required.
Associated casings and covers except for the runds as defined in Item
1.2.5.
Complete wiring of the point.
A fan under light point shall consist of :
(a).
(b).
(c).
(d).
N.B.
A three pin 5A socket outlet (shuttered type)/three pin 5A socket outlet
(shuttered type), on a Teak or Halmilla base.
Associated casings and covers except for the runs as defined in Item
1.2.5.
The earth continuity conductor.
Complete wiring of the point.
A fan point shall consist of :
(a).
(b).
1.1.5
Straight or Angle batten holder on square or round, Teak or Halmilla
base.
A single pole Tumbler switch on a square or round Teak or Halmilla
base or a single pole flush type switch on Teak or Halmilla base.
Associated casings and covers except for the runs as defined in Item
1.2.5.
Complete wiring of the point.
A socket Outlet shall consist of :
(a).
1.1.4
A single pole Tumbler Switch (5a) on round or square, Teak or
Halmilla base or a single pole flush type switch on Teak or Halmilla
base.
Complete wiring of the point.
(e).
Bracket holder
Adequate length of flexible 2 core cord.
Single pole switch on square or round Teak or Halmilla base.
Associated casings and covers except for the runs as defined in Item
1.2.5.
Complete wiring of the point.
1.
Fan Under-light
Where a fan under-light point is required as common 3 plate
ceiling rose may be used for the fan point and under-light. A fan
under-light point will be paid as an additional point.
2.
Two-way 5A Switch
When a two way 5A switch is required, it will be treated as two
separate points.
XXVI
1.2
Method of Installation :
1.2.1 Cables :
(a)
All cables to be colour coded/red and black for phase and neutral
respectively.
(i).
All runs on walls to be enclosed in casings and covers where
Tumbler switches are used.
(ii).
All runs on walls to be laid in PVC conduit of not less than
18mm diameter concealed in the wall plaster.
Or
1.2.2
(b)
All runs above ceilings to be clipped, clips spaced not more than
200mm on the horizontal runs and 350mm on vertical runs.
(c)
Where cables have to be run on iron support, wooden battens of
suitable size shall be used. These battens shall be secured to the iron
by metal clips, spaced not more than 600mm apart. These battens shall
be paid for as extras and the Tendered should quote for the supply and
installation of various sizes.
Troughings and covers
(a)
(b)
(c)
Troughings to be fitted to wall, secured with iron screws on to dove tail
plugs cemented to wall, or by some other approved method.
Covers to be fitted on troughings with suitable nails spaced not more
than 200mm apart on either side.
These to be sand papered.
Conduits
1.2.3
The following accessories shall be mounted on Teak or Halmill a bases,
secured to the wall brass screws driven into dove tail plugs cement4d to the
wall Main Switch fuses, Distribution Boards, Switches, Socket outlets, and
wall racket fittings, ceiling rose, batten holders shall be mounted on Teak or
Halmilla base secured to the ceiling batten with brass screws.
1.2.4
Horizontal runs of cables, mains or otherwise when exposed to view under the
ceiling or in the absence of a ceiling, shall be enclosed in casings and covers.
These casings and covers will be paid for as extras at the rate accepted in the
Tender.
Suspension type fluorescent fittings shall be hung from eye hooks on ceiling
plate securely fixed to the ceiling or beam overhead. Suspension shall be by
means of galvanized iron chains of suitable size.
1.2.5
1.2.6
Where wires have to pass through walls, PVC conduits shall be used. These
conduits should be of suitable size to carry the number of wires used and
should be securely fixed to the wall before the wires are drawn through. Care
should be taken to prevent damage to wires at the end s of the tubes.
XXVII
1.3
1.4
Wiring
1.3.1
All wiring to be done in strict accordance with the wiring regulations for
buildings Institution of Electrical Engineers (London) latest edition and in
accordance with the requirements of the Ceylon Electricity Board.
1.3.2
The wiring shall commence at the main switch fuse. The loop in system of
wiring shall be used and no joints will be permitted in the cable runs.
1.3.3
All cables to be colour coded red and black for phase and neutral respectively.
Earthing
1.4.1
The earth pin of all sockets to be connected to an earth continuity conductor.
All joints on this conductor to be soldered. The conductor is to be finally
terminated outside the building for connection to the earth electrode. The size
of the earth continuity conductor shall be in accordance with the I.E.E.
Regulations for Electrical Installations in buildings (latest edition) - the
minimum size being as in Item 1.7 of the Specifications for materials.
1.4.2
Where required, the wiring of a fan point shall provide for the connection of a
fan regulator to the earth continuity conductor.
1.4.3
The earth continuity shall be securely fixed by means of a suitable earth clip to
one or more earth electrode as required. Earth electrode should be positioned
outside the building at a suitable location.
1.4.4
Where the earth continuity conductor is run in casing, it shall be secured to
casing by small staples. For runs above the ceiling, it shall be secured to the
roof timber with copper staples. The length of the earth continuity conductor
buried in ground shall be drawn through a G.I. pipe of suitable size not less
than 50mm diameter.
1.4.5
The runs to the earth electrode, below ceiling level, shall be in conduit or
enclosed in casing and covers.
Part I - Chapter 13 of the I.E.E. Regulations
Fundamental Requirements for Safety
Workmanship and material
13-1
Good workmanship and proper material shall be used.
General
13-2
All equipment shall be constructed, installed and protected, and shall be
capable of being maintained, inspected and tested, so as to prevent danger so
far as is reasonably practicable.
13-3
All equipment shall be suitable for the maximum power demanded by the
current using equipment when it is functioning in its intended manner.
13-4
All electrical conductors shall be of sufficient size and current carrying
capacity for the purposes for which they are intended.
13-5
All conductors shall either XXVIII
(i)
be so insulated, and where necessary further effectively protected, or
(ii)
be so placed and safeguarded
as to prevent danger, so far as is reasonably practicable.
13-6
Every electrical joint and connection shall be of proper construction as regards
conductance, insulation and mechanical strength and protection.
Over-current Protective Devices
13-7
Where necessary to prevent danger, every installation and every circuit thereof
shall be protected against over-current by devices which (i)
(ii)
(iii)
will operate automatically at values of current which are suitable
related to the safe current ratings of the circuit, and
are of adequate breaking capacity and where appropriate making
capacity and
are suitably located and are constructed so as to prevent danger from
overheating, arching or the scattering of hot particles when they come
into operation and to permit ready restoration of the supply without
danger.
Precautions against earth leakage and earth fault currents
13-8
Where metal work of electrical equipment, other than current-carrying
conductors, may become charged with electricity in such a manner as to cause
danger if the insulation of a conductor should become defective or if a fault
should occur in any equipment.
(i)
(ii)
13-9
The metal work shall be earthed in such a manner as will cause
discharge of electrical energy without danger or
other equally effective precautions shall be taken to prevent danger.
Every circuit shall be arranged so as to prevent the persistence of dangerous
earth leakage currents.
13-10 Where metal work is earthed in accordance with Regulation 13.8(i) the circuits
concerned shall be protected against the persistence of dangerous earth fault
currents by (i)
(ii)
the over-current protective devices required by Regulation 13-7 or
a residual current device or equally effective device.
The method described in Item (ii) above shall be used whenever the
prospective earth fault current is insufficient to cause prompt operation of the
over-current protective devices.
13-11 Where necessary to prevent danger, where metal work of electrical equipment
is earthed for compliance with Regulation 13-8(i) and is accessible
simultaneously with substantial exposed metal parts of other services, the
latter parts shall be effectively connected to the main earthing terminal of the
installation.
Position of Protective Devices and Switches
13-12 No fuse, or circuit breaker other than a linked circuit breaker shall be inserted
in an earthed neutral conductor, and any linked circuit breaker inserted in an
XXIX
earthed neutral conductor shall be arranged to break also all the related phase
conductors.
13-13 Every single pole switch shall be inserted in the phase conductor only, and any
switch connected in an earthed neutral conductor shall be a linked switch and
shall be arranged to break also all the related phase conductors.
Isolation and Switching
13-14 Effective means, suitably placed for ready operation shall be provided so that
all voltage may be cut off from every installation from every circuit thereof
and from all equipment, as may be necessary to prevent or remove danger.
13-15 For every electric motor an efficient means of disconnection shall be provided
which shall be readily accessible, easily operated and so placed as to prevent
danger.
Accessibility of equipment
13-16 Every piece of equipment which requires operation or attention by a person in
normal use shall be so installed that adequate and safe means of access and
working space are afforded for such operation or attention.
Precautions in Adverse Conditions
13-17 All equipment likely to be exposed to weather, corrosive atmosphere or other
adverse conditions shall be constructed or protected, as may be necessary to
prevent danger arising from such exposure.
13-18 All equipment in surroundings susceptible to risk of fire or explosion shall be
so constructed or protected and such other special precautions shall be taken,
as may be necessary to prevent danger.
Additions and alterations to an installation
13-19 No additions or alterations, temporary or permanent, shall be made to an
existing
installation, unless it has been ascertained that the ratings and the
condition of any existing equipment (including that of the supply undertaking)
which will have to carry any additional load is adequate for the altered
circumstances and that the earthing arrangements are also adequate.
Inspection and Testing
13-20 On completion of an installation or an extension or alteration of an
installation, appropriate tests and inspections shall be made to verify so far as
reasonably practicable that the requirements of Regulations 13.1 to 13.19
have been met.
13-21 Standard Mounting Heights
(Height from Fin. FLF)
2400mm
2250mm
2400mm
1500mm
1500mm
2000mm
300mm - Common area
XXX
Electrical wiring Accessories
Pendant Lamp
Wall Bracket Lamp
Exit sign Board
Switch Board
Fan Regulator
MCB Distribution board
Socket Outlet
LIST OF APPROVED ELECTRICAL FITTINGS
No.
Item
Relevant
Standard Recommended Brand
Specifications
Names
01
Sunk Switches, 10A
B.S. 3676
Clipsal,
M.K.
Legrand,
02
13A Switched Socket Outlets, Plugs & B.S. 1363
Adopters.
Clipsal,
M.K.
Legrand,
03
5A and 15A Switched Socket Outlets
B.S. 546
Clipsal,
M.K.
Legrand,
04
R.C.C.B./R.C.D.
05
M.C.B.
06
Consumer Unit
07
M.C.C.B.
08
Cu/PVC/SWA/PVC Cables
B.S.4293, IEC1008 F & G (Austria)
BS EN 61008
Siemens (Germany)
Clipsal (Australia)
Crabtree (U.K.)
Merlin Gern (France)
Legrand (France)
IEC 898 or BS
EN60898 or IEC F & G (Austria)
947-2
or Siemens (Germany)
B.S.3871:Part 1
Clipsal (Australia)
Crabtree (U.K.)
Merlin Gern (France)
Legrand (France)
B.S. 5486 Part 1 & ABB (Germany)
Part 13
L.E.C.439- ABC
(Singapore)
1 or BS EN 60439- Crabtree
(U.K.)
3 IEC 695-2-1
Hager
(France)
Legrand (France)
I.E.C.947-2:1989 BS Legrand
(France)
EN60947-2:1992
Merlin Gern (France)
Terasaki (Japan)
Klokner
Moeller (Germany)
Crabtree (U.K.)
B.S. 6346
ACL (Sri Lanka)
Wilson (Singapore)
B.S. 6004:1995 & Kelani (Sri Lanka)
SLS 733:1995
B.S. 5467
ACL (Sri Lanka)
Wilson (Singapore)
B.S. 5467
Kelani (Sri Lanka)
Cu/PVC/PVC Cables
09
Cu/XLPE/SWA/PVC Cables
Cu/XLPE/PVC Cables
No.
Item
Relevant
Standard Recommended Brand
Specifications
Names
XXXI
10
11
12
13
14
15
16
Fluorescent Ballasts with Screw Type I.E.C. 920, 921 & Schwabe (German)
Terminals
922
BSEN 60928
ATCO (Australia)
B.G. (U.K.)
fluorescent Lamps
I.E.C.81
Osram (Germany)
Colour : Cool White (4000 K)
B.S. 1853
Tungsram (Hungary)
Philips (Holland)
GE (USA)
Sylvania (USA)
Westinghouse (USA)
Lighting Fixtures
EN 60598
Thorn UK)
BS 4533
Philips (Holland)
Steel Enclosures (Epoxy Powder I.E.C.529 for degree Elsteel (Sri Lanka)
coated finish)
of protection
Legrand (France)
Himel (Spain)
BSEN 60529
Enclotek (India)
Metalix (Sri Lanka)
Exhaust Fans
BS 5060
KDK (Japan)
I.E.C.879:1987)
Alstom (UK)
National (Japan)
PVC Conduits
BS 4607 & BS 6099
National,
Anton,
Duro, S-lon
G.I. Conduits
BS 4568 Part 1
Matsushita, Maruichi,
Pusan or any U.L.
approved
U.S.
Brands.
List of Cable brands in Sri Lanka with SLS Certificate
ALUCOP, RUHUNU
ACL,
KML,
KELANI,
25. Air-conditioning
Unless otherwise specified Air-conditioning work shall conform the following design
criteria and conditions.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
Inside temperature should be maintained at 25 0 C + 1.50 C.
The inside relative humidity should be maintained at 55% + 15%.
Outside conditions to be taken as
Dry bulb temperature
330 C
Wet bulb temperature
290 C
i.e. relative humidity
75%
Noise level should be not more than 35db
A minimum of 1.3 Litres/S/m2 of fresh air should be supplied.
Air Velocity should be maintained at between 0.3m/s at a height of
1.5m from ground level.
The Co2 content should be less than 0.1%.
The Contractor should give a guarantee to the client that he will
maintain the above design conditions inside the air-conditioned areas.
The attached plans indicate the areas to be air-conditioned.
The Contractor should indicate as an extra item the conditions and cost
of an annual maintenance contract.
XXXII
(k)
(l)
(m)
The Contractor should submit the Technical Literature with the
quotation.
A guarantee that spares will be available for all equipment supplied for
at least a period of 5 years should be given by the local agent.
Performance tests to ascertain that the specified design conditions are
maintained should be carried out at the time of commissioning.
26. Waterproofing
(a).
The waterproofing Contractor (or Sub-Contractor) should be a registered
specialist contractor at the ICTAD on the particular area.
(b).
The Contractor should issue a written warranty of at least 5 year to cover on
the quality of the material, suitability of the material for the situation and the
workmanship.
(c).
The waterproofing material shall conform to relevant British, Euro or ASTM
specifications.
Rates shall include for cutting, notching, bending and extra material for
lapping making into recesses, inserts, pipes and the like and for working to
falls and cross falls.
(i).
Internal and external angles, angles fillets, arisers, edges, intersection
and the like.
(ii).
Cleaning with wire brush where necessary priming all joints including
necessary additional materials.
(d).
(iii)
Application of liquid polymer cement water proofing agents for the
following.
Flat roofs, concrete/masonry tanks, wet areas of toilets including
bathrooms, exposed balconies, concrete gutters.
"Smart flex",
"Thoroseal" or any other approved equivalent product marketed by
specialist contractor registered at ICTAD.
(iv)
Application of cementations type agents with positive and negative
(back-flow resistance) properties on newly cast under ground sumps,
swimming pool basements, "Osmoseal", "Xypesx", "Vandex" or any
other approved equivalent product marketed/installed by a specialist
contractor registered at ICTAD.
(iv)
Application of membrane type agents and insulation of same less
membrane type water proofing on large flat roofs, gutters, basements.
Material thickness not less than 3mm and comply to
BS/ASTM/JIS/AU Standards.
28 Steel Grill Work
(a).
Rates for Steel Grill Work shall include shop fabrication work
including cutting, drilling, bolting, welding, grinding, marking,
delivering, un-loading, , erecting and fixing in position.
(b).
Rate shall include for two coats of matt oil paint after treating with a
coat of anti-corrosive paint to all exposed faces of grill.
XXXIII
(c).
All bolt holes to be machine drilled.
(d).
to
Steel shall normally be welded by the metal area process conforming
B.S. 5135.
authorities.
Other methods shall be subject to the approval of the
(e).
Unless otherwise specified all steel shall be Grade 43A.
(f).
Structural steel shall conform to BS 4360.
29 Steel Balustrade Work
(a).
Rates for Steel Balustrade Work shall include shop fabrication work
including cutting, drilling, bolting, , welding, grinding, marking,
delivering, un-loading, , erecting and fixing in position.
(b).
Rate shall include for two coats of matt oil paint after treating with a
coat of anti-corrosive paint to all exposed faces of grill.
(c).
All bolt holes to be machine drilled.
(d).
to
Steel shall normally be welded by the metal area process conforming
B.S. 5135. Other methods shall be subject to the approval of the
authorities.
(e).
Unless otherwise specified all steel shall be Grade 43A.
(f).
Structural steel shall conform to BS 4360.
30 Roller Shutter Door
(a)
Slats: Color bonded/Zinc coated slats to the thickness of 0.7mm and
0.8mm respectively to the width of 75mm (3") and 100mm (4")
(b)
Flat & curve special feature. Specially imported hard rubber beading
on
side channels to minimize the rough flow of the shutter colours, choice
of 10 colors.
SPECIFICATIONS
Specifications comprise of two sections. The “General Specifications” and “Particular
Specifications” together comprise the specification governing the works described in the
B.O.Q. and B.S.R.
Several national and international standards have been quoted in the specifications. All
Workmanship Materials and Components throughout shall where applicable and unless
otherwise stated in the Specification comply with the relevant American, British or Sri
Lankan
XXXIV
Standards, current on the date fixed for receipt of Bids together with additional clauses or
amendments set out in the specifications.
Order or precedence of the standards shall be as follows:
1. Sri Lanka Standards
2. British Standards
3. American Standards
Bidders may offer materials in accordance with such other standards or specifications which
provide for quality and workmanship not inferior to the standards quoted together with the
additional clauses or amendment set out in these specifications. Such standards or
specifications shall be submitted in full at the time of bidding. Authenticated English
translation shall be submitted if the specifications are in other language.
When reference is made within these documents to certain standards, specifications or
regulations, the reference shall be construed to mean the standards with all subsequent
amendments and changes or additions as thereafter adopted and published that are in effect at
the date fixed for receipt of Bidders.
Bidders are instructed that any clarifications and/or additional information etc. pertaining to
the scope of work should be obtained fully before Bid submission and that the quality and
quantum of work which should be as per the above standards properly understood since no
extra works would be due any subsequent clarifications of lack of information.
General Specifications
The general Specifications are the specifications given in the following documents issued by
the Institute for Construction Training And Development (ICTAD).
The Bidders are expected to be conversant with these documents, since the said documents
will not be issued to the Bidders under this Bid, however the Bidders may purchase the
documents from ICTAD, “Savsiripaya”, Wijerama Mawatha, Colombo 7.
Publication No.
Description
SCA/4(Vol. I)
Specification for Building Works Vol. I
SCA/4(Vol. II)
Specification for Building Works Vol. II
SCA/8
Specification for Electrical & Mechanical
associated with Building and Civil Engineering
SCA/3/1
Specifications for Irrigation and Land Drainage
SCA/3/2
Specifications for Water Supply, Sewerage and Storm
water Drainage work.
works
Standard
specifications
for
Construction
and
Maintenance of roads and Bridges issued by the RDA.
XXXV
Special Specifications
1. Special Specifications for Concreting
2. Special Specifications for Aluminum Works
3. Special Specifications for Electrical Installation
4. Special Specifications for Air-Conditioning System
5. Special Specifications for Water Proofing
1. Special Specifications for Concrete
Criteria of rejection of concrete
Hardened concrete shall be liable for rejection if any of the following defects occur,
a. The concrete is heavily porous, segregated or honeycombed.
b. A construction joint has been made at a location or in a manner not in
accordance with this specification.
c. The construction tolerances have not been met.
d. The reinforcing steel has been displaced from its correct location.
e. The embedded items in concrete have been displaced from their correct
position.
f. The required surface finish has not been achieved.
g. The test results and/or load test fails.
Curing of Concrete (refer clause 4.3.5)
Recommended methods for curing
a. Ponding or continues sprinkling with water.
b. The use of an absorptive cover kept continuously wet
c. The use of curing compounds to be approved by the Engineer.
d. The use of an impermeable sheet membrane over a moistened surface so fixed
and lapped that circulation can occur at the concrete surface
Frequency of Sampling Test Specimen’s
1. At test three (3) specimens shall be taken from a sample and cured.
2. A record on the full history of sampling and testing of all specimens.
Concrete Acceptance criteria
The concrete shall be deemed to comply with the strength requirements if the
characteristic strength of the concrete meets the following,
Grade
Description
28 days characteristic
strength (N/m2)
28 days compressive strength (N/m2)
Average of any group
individual
Of three (3) consecutive
test result
XXXVI
25
25
Test results shall be
Greater than 32.5
shall be
greater
Than 21.5
Concrete Sampling and Testing
1. Cement
2. Fine Aggregate
3. Course Aggregate
4. Slump
Sampling
1. A sample for reinforcement bars shall mean three samples of reinforcement bars
representing each diameter; for each 10 Metric Ton.
2. A sample for concrete shall mean seven numbers of concrete cubes
(150mmx150mmx150mm) obtained at the location of placing concrete.
Fine Aggregate
a. Offshore sea sand – marketed by SLRDC
i . Sea sand passing 5mm sieve shall be permitted
ii. The origin of the sea sand shall be established at from a SLRDC Depot (Lorry
No. and permit copy to be annexed)
iii. Limit of grading
Based on sieve analysis of sand, limits are as below reference clause 4.1.3.5 –
table 4.2
Sieve size
overall limits
10mm
5.00mm
2.36mm
1.18mm
600µm
300µm
150µm
100
89-100
60-100
30-100
15-100
5-70
0-15
Zone-C
60-100
30-90
15-54
5-40
-
Grading
Zone-M
65-100
45-100
25-80
5-48
-
Zone-F
80-100
70-100
55-100
5-70
-
iv. The quantity of material passing the 75 µm sieve should not be 4% by weight.
Course Aggregate
Refer table 4.1 / clause 4.1.3.5 0f ICTAD SCA/4/1 for grading.
2. Special Specifications for Aluminum Works
Specimen Notes for Aluminum Doors, Windows & Fanlights
(c).
The Aluminum alloy to be used shall conform to the requirements of BS
1474:1987 - AA 6063 surface treatment shall conform to BS 1615 & BS 3987.
(d).
Physical Properties:
1.
2.
Minimum tensile strength 150 Mpa.
Elongation 7%.
XXXVII
(e).
Anodic Oxidation coating should conform to BS 1615:1987 and BS
3987:1974 and the minimum coating thickness should be 20 + 25 Microns.
The Supplier should furnish the manufacturer's certificate that the anodized
finish complies with the specified Microns content.
(f).
Minimum section thickness 1.8mm door frame, 1.5mm window frame and
1.00mm partition.
(g).
Joints shall be made mechanically sound by welding or by concealed
mechanical connectors. A water tight joint shall be made at the junctions and
side frames members and water will not be trapped anywhere in or around
frames.
(h).
All ironmongery shall be of the same material and satisfactorily performed the
function for which intended and shall be securely attached.
(i).
Caulking compound shall be the best quality available for caulking between
the contact surfaces of the structure and the aluminum windows conforming
the adhering qualities, temperature resistance from 50F - 160F and humidity
changes of 5% - 100%.
(j).
Screws used in the construction of frames shall be high tensile stainless steel
or a non-corrosive material compatible with aluminum.
(k).
Neoprene weather stripping shall be of the highest commercial standards for
normal temperature, water and abrasion resistance.
(l).
Frames shall be fixed to the structural opening with proper fixing devices. If
any discrepancies occurring between approved drawings and site conditions
these shall be brought to the notice of the Engineer.
(m).
Material and dimensions should be confirmed before any fabrication and
installation.
(n).
A Ten year guarantee period is required and this to be transferred to the Client
after practical completion.
(o)
At the same time of bidding, all the Bidders shall specifically be requested to
submit the following information.
i
ii
iii
iv
The specifications and thickness of aluminum extrusions bidder
proposes to use on the work.
Full size cross sections
Documentary evidence from the Profile Manufacturer to the effect that
the proposed profile will serve for the intended purpose.
A Manufacturer's test certificate be produced as evidence that the
powder coating is of required thickness.
3. Special Specifications for Electrical Installation
1.0
All material and equipment used shall conform to the relevant current B.S.
specification, Sri Lanka standard specification or any other internationally
recognized specification not less rigid.
XXXVIII
1.1
Cable for Sub-circuit Wiring shall be of Copper 1/1.13 cross section
to be in PVC cables in accordance with B.S.S.6004/1969 and
amendments to it.
1.2
Ceiling roses shall be of shock proof, bakelite covered two plate type
or three plate type with an efficient cord grip.
1.3
Lamp holder suspension type shall be of the bayonet socket pattern
of shock proof bakelite having an efficient cord grip solid plunger,
brass reinforcing barrel liner shade ring and all metal parts to be of
brass.
Lamp holder batten type shall be of the bayonet socket pattern of
shock proof bakelite straight or angle type as required, having solid
plungers brass reinforcing barrel liner, shade ring and all metal parts of
brass.
Switches shall be single pole, single way of the shock proof bakelite
covered type, screws, contacts and springs to be made of brass, base to
be of porcelain or ceramic.
1.4A
1.4B
Sunk type switches shall be single pole, single way of the shock proof
covered type, screws, contacts and springs to be made of brass, base
and cover to be made of bakelite with area moulding powder and
approved quality.
1.5
Flexible cord 16/0.0.20 to be of Copper twin PVC insulated and PVC
Overheated.
1.6
Wiring clips shall be of tinned brass or aluminum with counter sunk
holes short, medium, large or small according to requirements. These
shall be fixed by means of gimp pins of brass.
1.7
Earth Conductors and Continuity Conductors shall be of PVC
Insulated copper and be of relevant cross sectional area as given in the
latest I.E.E. regulations.
1.8
Wooden blocks shall be of Teak, Halmilla circular, square or
Rectangular according to requirements and smooth finished.
1.9
Wooden battens shall be of Teak or Halmilla of rectangular cross
section 50mm x 12mm.
1.10
Screws all screws used in the fixing of casting blocks, covers, witches
etc. shall be of brass except where otherwise stated.
1.11
Fuse carrier and base this section is applicable to all fuse carriers and
bases used in distribution boards and main switches provided under the
Contract.
(a).
(b).
(c).
2.0
The base shall be vitreous porcelain with holes for cable entry
at top and bottom and two holes for screws. Base contacts shall
be in brass.
The fuse carrier shall be of vitreous porcelain.
The fuse wire shall be of tinned copper.
Troughings and covers shall be of seasoned Teak, Halmilla or approved
Class I timber must be of good workmanship smooth to finished with covers
XXXIX
having suitable mouldings. All troughings and covers which are exposed
should be neatly finished (including sand papering).
3.0
Cable mains must be of specified size and to be in PVC in accordance with
B.S.S. 6004/1969 with copper conductors.
4.0
Main Switch
(1)
Splitter type :
Two pole (5 Amp. and 10 Amp.) all insulated main switch suitable for
230V A.C. two wire 50Hz. system.
(2)
All insulated shall be of the all insulated type and double pole single
way. The switch shall have all metal parts in brass and shall be so
arranged to prevent the cover being opened when the switch is at the
"ON" position. One pole to be fused.
Metal Clad shall be S.P. and neutral or triple pole with fuses on three
phases and provided with removable link on the neutral. The switch to
be provided with interlocking device to prevent the cover being opened
when the switch is in the "ON" position. All current carrying metal
parts shall be in brass and switch to be provided with entry holes and
insulating bushes.
(3)
5.0
Socket outlets shall be of the standard 3 pins, shock proof type bakelite
covered with a porcelain ceramic or track free plastic base and provided with a
shutter mechanism operated by the earth pin on insertion and withdrawal of
plugs. All metal parts to be in brass. This item shall comply with B.S.S.
546/1979 and latest amendments thereto.
6.0
Earth pipe shall be of heavy quality galvanized iron pipe 50mm in diameter
and 2000mm long with one brass bolt welded to the pipe at top with two
brass hexagon nuts and washers. The pipes should be symmetrically tapered
at the bottom end.
7.0
Fan hooks shall be of mild steel rods 18mm size.
8.0
G.I. Pipes for fan beams shall be of galvanized 50mm size
9.0
Lamp shades plastic conical 250mm shallow type.
10.0
Earth leakage trips (current operated) shall be of shock proof bakelite cover
all insulated type two pole or 4 pole according to requirements having a
switch
and handle to "ON" and "OFF". The breaker shall be designed to operate
with the leakage current not exceeding 30MA through the trip coil complete
with test key. This earth leakage circuit breakers shall be mounted very close
to the apparatus to be protected on a wooden block of suitable
size.
11.0
Distribution Board shall be SP & N or TP & N as specified in the design.
MCB board shall comply with BS 5486 Part III. Every distribution shall be
provided with a multi terminal earthling conduit.
12.0
Fluorescent lamp fitting whether batten or suspension type shall comprise of
a current limiting choke which assists starting a Thermal or glow type starter
having a radio interference suppression capacitor and a power factor
XL
Correcting condenser.
Each fitting shall be complete with Metal/Copal Perspex reflector. Bi-pin
lampscaps fluorescent tubes and Bi-pin lamp holders all completely wired
internally. The fitting shall be suitable for the use on 230 Volts. Single phase,
50 Hz., A.C. supply. Suspension of fitting shall be rigid tubes or brass chain
fixed to hooks screwed into rawl or Phil plugs buried in ceiling or any other
approved method. Batten type fitting shall be fixed direct on to the support by
the air of Phil or rawl plug or any other approved method.
13.0
Ceiling fan fitting shall be of the three bladed type with insulator and shackle
and suitable length of down rod and canopy with motor for use on 230 Volts
50 Hz. single phase A.C. supply. The motor shall be of the totally enclosed
shaded pole induction or capacitor type fitted with grease packed ball bearings
and the fan shall be white enamel finished. Provisions shall also be made for
an electorlier when required. The terminal block in the fan as well as the
capacitor must be protected by removable covers.
14.0
Fan regulator shall be of the series choke or resistance type and shall have at
least 5 speeds and "OFF" position. Regulator unless fully insulated must be
earthen.
15.0
MCCB: 400V, 3 phase, 3 poles and neutral, 50 Hz.
B.S. 3871 Part II 1966.
The case shall be of moulded insulating material, possessing high thermal
stability and good mechanical strength to withstand rough usage without any
fracture of permanent distortion having front operating handle with trip free
feature for manual "ON" and "OFF" operation.
It shall comprise:
(1)
A delayed thermal or magnetic release which shall be
adjustable between 60% to 100% of maximum continuous
current rating of the breaker.
(2)
An instantaneous electromagnetic over current release which
shall be adjustable between 3 to 5 times to maximum current
rating of the breaker.
The making and breaking capacity in KA and the performance category as per
BS 4752 Part I 1977.
16.0
MCB : 400V/230V, 50Hz. as per BS 3871 Part I 1965; IEC 157-1
The case shall be of sealed type and made of moulding insulating material
possessing high thermal stability and good mechanical strength to withstand
rough usage without any fracture of permanent distortion.
The MCB should possess mechanical life span and component life span at the
rated current not of less than 20,000 operation or 40,000 movements. It shall
be single pole or triple pole type with separate detachable neutral link and
having provision for accommodating incoming and outgoing aluminum or
copper service wire up to 16mm2 for Amps. and 20mm2 for Amps.
4. Special Specifications for Air-conditioning
Technical Specifications for Split Type Air-conditioners
XLI
(A)
From 12000 BTU/Hr upto 24000 BTU/Hr.
i
Indoor Unit
(a)
Fan shall be multiple speed
(b)
Fan motor bearing - permanently lubricated ball bearing type
(c)
Air filter shall be washable type
(d)
Operational control shall be wired type remote control type
ii
Out door Unit
(a)
Casing and condenser shall be of weatherproof construction
suitable for tropical climate.
(b)
Fans shall be suitable for outdoor use
(c)
Fan motor bearing shall be permanently lubricated ball
bearings.
(d)
Shall be supported in such away that casing is not exposed to
accumulated rainwater and also that there is sufficient room
and safety requirements to attend to servicing.
(e)
Compressor shall be scroll type.
iii
Protection Devices/Alarm
(a)
Compressor -
(b)
(B)
Fan motor
-
Overload protection
Internal thermostat
Anti re-cycling timer
Filter cleaner Notice
internal thermostat.
iv
Plants shall be suitable for single phase x 230V x 50Hz.
v
Condensate lines shall be insulated (25mm thickness) in indoor areas.
vi
Technical catalogues shall be submitted.
For plant above 24000 BTU/Hr.
Following changes additions shall apply.
Protection devices (Additional)
(a)
(b)
(c)
High pressure switch
Low pressure switch
Anti-phase protection
Plant shall be suitable for 3 phase 400V, 50Hz power supply.
(C)
Quality Standards
Plants offered shall have ISO 9001 quality accreditation and a copy of certificate shall
accompany with the offer.
5. Special Specifications for Water Proofing
(a)
General:
Warranty
(i)
Insulation, waterproofing and tanking shall be applied in accordance
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with the directions of the manufacturer of the materials and
components, and the complete systems shall be fitted in the works by
experienced specialist crew.
(ii)
Notwithstanding maintenance requirements for the works, the
Contractor shall warrant the Owner with the assurance of a reputable
local insurance Company that roof and tanks shall remain waterproof,
vapor proof and damp-proof in respect of workmanship and materials
for a minimum period of 10 years calculated from the time that the
works are certified as substantially completed.
(iii)
The form of guarantee offered by the specialist, applicator shall be
submitted
for
the
Consultant’s
approval prior to
commencement of
waterproofing. This guarantee shall in no way
indemnify the
Contractor against the improper performance of
the waterproofing
system.
(b)
(iv)
All structural components that retained or exclude water or any other
liquid should be applied with approved waterproofing material.
(v)
Roof slab should be externally waterproofed and insulated by an agent
approved by the Consultant.
Structure
(i)
It shall be the Contractor’s responsibility to ensure that the specialist
applicator takes note of the type of the structure, nature and the
location of waterproofing to be applied including any movement joints
provided, when designing his waterproofing system.
(ii)
(c)
The laying of a waterproofing system on a concrete surface will be
taken as signifying the acceptance of that surface., both in terms of
surface quality, spacing and arrangement of movement joints and the
construction joints by the Contractor and his specialist applicator.
Application
(i)
Where applicable, aprons and other sections for roof/tank penetrations,
rims, side laps, bends and corners shall be incorporated, corrected,
finished and uniformly lined.
(ii)
The waterproofing system shall be dressed up all pipes and other
penetrations to a minimum height of 250 above the top of the concrete
slab.
(iii)
Sharp corners are to be filled with screed or other fillets and
waterproofing should be laid with generous over lap as per
manufacturer’s instructions.
(iv)
When waterproofing is to be applied on exposed areas, colors have to
be approved by the Consultant.
(v)
Where finishes such as concrete paving or tiles etc., are specified to be
laid over waterproofing membranes laid on concrete floors, the floor
shall be tested for water tightness prior to laying of these tiles/paving’s
etc. Sumps, tanks etc. shall also be tested after the application of
waterproofing systems. The cost of carrying out these tests including
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that of blocking any outlets etc. shall be borne by the Contractor.
Where it is seen that water tightness has not been achieved, the
Contractor shall take whatever remedial measures as are ordered by
the Consultant and the cost of all such measures shall be borne by the
Contractor.
(d)
Joints with abutting walls, columns, piping etc.
(i)
Joints with abutting structure shall be carried out with materials as
specified in the relevant Clause of other trades, such as weather sealant
etc. all as generally shown otherwise in typical details on the drawings.
(ii)
Special joints, not shown on drawings or particular sections there of
requiring specials attention, are deemed to be included in the
Contractor’s Tender, and are to be executed in a workman like manner
nd in consent with and to the satisfaction of the Consultant.
Waterproofing System to roof slabs and machine floor areas
(a)
(b)
Leveling Screed
(i)
Before laying the leveling screed the concrete surface shall be cleaned
by removal of loose materials to the entire satisfaction of the
Consultant. Concrete which is contaminated by oil or grease shall be
chiseled away and refilled.
(ii)
Concrete slab shall be grouted with cement/water slurry before the
laying of leveling screed.
(iii)
1:3 Cement: Sand leveling screed shall be mechanically bath mixed
and laid with a minimum thickness of 25mm, the falls to be achieved
are not less than 1:200 or as shown in the drawings. Screed shall be
laid with even slopes and internal and external corners shall have cover
fillets with a radius of at least 70mm. The screed shall be finished with
a wooden float.
(iv)
The screed shall be covered with wet saw dust, sand or equal method
and kept damp for 5 days, or as ordered by the Consultant. Screed
shall be protected from rainfall. Waterproofing membrane shall not be
applied until the surface is thoroughly dried out.
Waterproofing WP1
(i)
The following specification is for a built-up waterproofing system of
non-metalic roofing compound of laminar bituminized construction
intended for this Project. The Contractor may submit alternative
reputable constructions together with the relevant specification and
method statement to the approval of the Consultant; such constructions
should in any case conform to the insurance requirement specified
under “Warranty” requirement (See Clause 3.1.1).
(ii)
Waterproofing membrane shall be U.V. resistant mineralized atactic
polypropylene (APP) modified bituminous polyester sheet with
approximate weigh 4.0 kg/m2 and 4.0mm thick suitable for Torchedon application over the substrate after application of the approved
primer.
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An interruption of work the edges of the sheets have to be finished in
such a manner that rain water and dust cannot penetrate underneath.
(c)
(d)
Insulation
(i)
On top of the waterproofing membrane, polyurethane or extruded
polystyrene boards 50mm thick with Thermal conductivity of
0.027 W/m0 C @ 250 C (approx.).
(ii)
Method should comply with the following standards ASTM D-1622,
ASTM C-518, ASTM C-272 and ASTM D-696.
(iii)
The boards shall have rebated edges all round for interlocked laying.
In sizes 600 x 1200mm tightly laid in stretcher bond.
(iv)
The compressive strength of the insulation boards shall be not less than
40kPa according to ASTM C-165 procedure B.
(v)
Insulation boards shall be protected against rain and humidity.
Concrete Covering Screed
(i)
60mm Thick, grade 25 concrete covering screed shall be laid over the
gauge 1000 polythene sheet as shown on the drawing. 50 x 50mm
(3mm dia.) galvanized steel wire-mesh shall be incorporated in the
concrete
screed layer. 10mm Thick expansion joints shall be
provided in covering screed to limit the concrete screed panel size
approximately to 4.0 Sq.m.. Expansion joints shall be coincided with
the joints of the tile layer (if any)
above and later filled by the
approved
joint sealant (DOWCORNING 790
SILICONE
BUILDING
SEALANT).
(iii)
Alternatively, reinforced concrete floating slab shall be constructed in
stead of concrete screed if there is any possibility of installation of
mechanical plants or equipment.
Waterproofing System to Basement Slab
(a)
(b)
Concrete Screed
(i)
Concrete screed shall be mechanically batch mixed and laid over the
well compacted and approved formation of the sub base or otherwise
directed by the Consultant. The concrete grade 15 shall be laid to
produce a concrete screed of 75mm thick.
(ii)
The screed shall be covered with wet saw dust, sand or equal method
and kept damp for at least 5 days, or as instructed by the Consultant.
(iii)
Before laying of the waterproofing membrane, the concrete surface
shall be thoroughly cleaned and dried out.
Waterproofing Membrane (WP2)
(i)
The prepared concrete surface shall be waterproofed by means APP
bituminous polyester sheet with approximate weight 4.0 kg/m2 and 4.0
mm thick suitable for torched-on application over the substrata after
application of approved primer.
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(ii)
(iii)
(iv)
(c)
Application of the waterproofing membrane shall strictly be in
accordance with the manufacturer’s instruction maintaining sufficient
over lap at joints.
At interruption of work the edges of the sheets have to be finished in
such a manner that rain water of duct shall not penetrate underneath.
The Contractor shall ensure timely submission to the Consultant of
details, type, make and composition of the waterproofing systems
together with certified proof from the manufacturer of the proposed
system.
Screed Cover
(i)
Mechanically bath mixed cement; sand (1:3) screed shall be laid over
the waterproofing membrane having a minimum layer thickness of
15mm.
(ii)
Waterproofing membrane should be laid 6m beyond the construction
joints of the raft slab and should be covered with the protective screed.
Waterproofing System to Basement Walls
(a)
Surface Preparation
(i)
Wall shall be well cleaned and free from damp, laitance, dust and dirt.
If contaminated by oil or grease of whatever nature, the patches shall
be chiseled away and made good.
(b)
Waterproofing Membrane (WP3)
(i)
The prepared concrete surface shall be waterproofed by means of a 1.5
mm thick (minimum thickness) P.V.C. film/self adhesive bitumen
laminated, supplied in roll form or other approved system. The
laminate or other approved system shall be applied in strict accordance
with the manufacturer’s instructions including the necessary prime
coats, tact coats etc.
(ii)
(c)
Application of the waterproofing membrane shall strictly be in
accordance with the manufacturer’s instruction maintaining sufficient
over lap at joint.
Waterproofing WP4
(i)
Waterproofing of concrete slabs before receiving the ultimate finish
shall be carried out as detailed below.
(ii)
In these areas, the prepared concrete floor and abutting up-stands/fillets
shall be waterproofed by means of application of Polymer modified
cementations waterproofing coatings or other approve method in
accordance with the manufacturer’s instructions.
(iii)
The waterproofing system shall be applied in strict accordance with the
manufacturer’s instructions, including primers etc. The system shall
be suitable to receive the screed.
(iv)
The Contractor shall ensure that all penetrations of the relevant
floors/slabs shall be waterproofed in a workmanlike manner and as per
instructions by the manufacturer’s or lacking that by the Consultant.
(v)
The Contractor shall ensure timely submission to the Consultant of
details, type, make and composition o the systems together with
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certified proof from the manufacturer in respect of the suitability of his
system.
To Sumps, Tanks and Ponds
(a)
General
(i)
Floors and walls of all sumps and tanks shall be coated with Polymer
modified cementitious waterproofing coatings.
The method of
application and quality of material shall be to the approval of the
Consultant.
(ii)
The surfaces to receive the waterproofing shall be smooth, free from
dust and dirt. Splayed or rounded fillets shall be provided between
horizontal and vertical surfaces and at all junctions of vertical or
horizontal surfaces.
(iii)
The joints in each application shall overlap one another and shall not
coincide with the joints in previous coats.
(iv)
The Contractor shall ensure that the coatings are not damaged in any
way and will provide protection at all times during the execution of the
works.
(b)
Waterproofing WP5
(i)
The waterproofing shall consist of application of Polymer modified
cementitious approved waterproofing coating according to the
manufacturer’s recommendations.
(ii)
The Contractor shall ensure that all penetrations for piping, galleys etc.
shall be waterproofed in a workmanlike manner.
(iii)
The Contractor shall satisfy the Consultant that the waterproof coating
is not of a toxic nature, giving no elements toxic to drinking water.
(iv)
If the latter should occur, the Contractor shall provide and apply extra
coat(s) of non-toxic sealant to walls and floors of drinking water
sumps, all in accordance with the manufacturer’s instructions.
To Pits, Galleys etc.
(a)
Waterproofing WP6
(i)
All pints, galleys, gutters and such other structure as the Consultant
shall designate shall be internally treated with two coats of black tar
paint in accordance with BS 1070.
(b)
Application
(i)
Concrete masonry, whether plastered or not which is to be coated with
tar paint shall be well cleaned, and free from damp, dust and dirt. The
paint shall be applied to bottoms of pits, benching therein and sides
over full height.
Distinction of Waterproofing Systems
(a)
General
In order to distinguish between the various systems of waterproofing in
relation to the finishi9ng schedules and/or drawings, the following denomination shall
be adhered to:
WP1 :
For roofs and machine floor areas
WP2 :
For basement slab
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WP3 :
WP4
WP5 :
For basement walls
: For concrete slabs before finishing (heavy duty) comprising toilet
floors balconies, gutters etc.
For sumps, tanks and ponds
WP6 :For pits, galleys etc. comprising but not limited to all pits, inspection pits,
pumps-pits etc. inside and outside the building for drainage, waste water,
sewerage and rain water assembly and/or transport.
SAMPLE PRELIMINARIES BILL
A list of typical items complementary to the works that may be incorporated in to a
Preliminaries bill is given below as a guide. Divisional Engineer shall decide on the
necessity of each and every item depending on the location, magnitude and nature of
the work concerned. Pricing of preliminary bill items shall be done in accordance with
the guidelines issued by the Deputy Chief Secretary (Engineering). The total sum of
preliminary bill items shall be in the range of 3-4% of the total construction cost (i.e.
B.O.Q. total for a completed building. In case of a partially completed building the
above percentage may not be applicable.)
(Please note that it is mandatory to include the Item Nos. 1 to 10, 14 to 18, 21, 24, 28,
29 and 32 in to the preliminaries bill)
Item No.6 shall be re-drafted to suit the Nature of work (E.g. for a minor repair work
or the construction of a boundary wall or a toilet, the whole item may be deleted.)
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01.
Provide lump sum for the cost of submission of an advance payment guarantee
02.
Provide lump sum for the cost of submission of the performance bond
03.
Provide lump sum for the cost of submission of an insurance guaranty against fire,
lightning, riot and civil commotion, gales and thunderstorms, seasonal floods, theft,
for material, permanent work, plant and machinery.(i.e. Contractor’s All Risk
insurance Policy, including riots and civil commotion (civil unrest).
04.
Provide lump sum for submission of an insurance guaranty for the injury to third party
persons including Engineer’s representative and damage to property belonging to
third party
05.
Provide lump sum for submission of an insurance guaranty against the accident and
injury to workman.
06.
Provision of a sum to construct, furnish, Equip and maintain site office for the
Engineer’s staff, Rate shall include for the furnishing of following equipment/
furniture: Cost shall include for maintaining the same during contract period and
demolition and removal on practical completion.
-
15’-0”x 10’-0” Office with a toilet(Depending on the magnitude of work
this can be wave-off or modified)
Two (2) Nos.3’-6”x 2’-0” Tables with lockable drawers and Six (6) Nos.
plastic chairs.
One ceiling fan with two lights
Steel four drawer cupboard
Water filter and water heater
Four (4) No. Tea cups and six drinking glasses
Three (3) pairs of gun boots and 3 helmets
Drawing rack
4’-0”x 2’-0” Display board
First-Aid Box
Measuring Tape (20m)-Two(2)Nos.
Calculators – Two (2) Nos.
Umbrellas-Two (2) Nos.
07.
Provide lump sum for the cost of construction and maintenance of temporary sheds to
accommodate Bidder’s staff and workman & either at the site or elsewhere (as
specifically approved by the Engineer) during the contract period and demolition and
removal on practical completion.
08.
Provide lump sum for the cost of construction and maintenance of sanitary facilities
for all the Contrctor’s staff and workman at the site during the contract period and
demolition and removal on practical completion. In the event of client’s facilities
being used by the contractor, a deduction has to be made.
09.
Provide lump sum for the cost of construction of a temporary office with sanitary
facilities for the contractor’s supervisory staff and its maintenance during the contract
period and demolition and removal on practical completion.
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10.
Provide lump sum for the cost of preparation and furnishing “Master Program of
Work” as per contract conditions, up-dating the same, submission of cash flow
forecast and monthly progress reports.
11.
Provide lump sum for the supply and installation of a Brand New computer (Duo
core), UPS and A4 size inkjet printer with e-mail facilities and maintaining the same
throughout contract period for the exclusive use of the Engineer’s staff. Quoted sum
shall include a reasonable cost of paper and printer consumables required for
correspondence for the engineer’s staff.
12.
Provide lump sum for the cost of supplying and maintaining telephone and Fax
machine at the site throughout the construction period in case where e-mail facilities
are not available.
13.
Provide lump sum for submission of printed digital photographs of post card size to
record specific construction events and stages as directed by the Engineer.
14.
Provision of a sum to construct facilities to store materials and plants.
15.
Provision to supply and temporary storage of water including plumbing work and
service connection or to use the Client’s facility and to make a monthly
payment.
16.
Provision to obtain temporary electricity to site for the works during construction.
17.
Provision to necessary protective fencing and other precautions.
18.
Provision to safeguard the works, material and plants against theft, Watchers
including provision for shelter and torches.
19.
Allow lump sum for maintaining temporary roads within the site.
20.
Allow for bringing the plant and equipment to site and maintaining the same during
construction period and removing from site on completion.
21.
Allow lump sum for safety, health and welfare of the workmen as per statutory
requirements
22.
Setting out of the works through a licensed Surveyor and submission of a signed
survey plan of the premises.
23.
Establishment of permanent bench marks and reference points of the
column/building grids.
24.
Erection of a Name board with the building elevation on a screen print fixed to a
G.I. frame work of 6’-0”x 4’-0” at 7’-0” above Ground level (letter height 3”).
25.
Allow for the Construction management services as per the contract (resident
Engineer and/or Technical Officers) throughout the construction.(Note: The No. of
personal, their technical qualification and experience is given in the bidding
document)
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26.
Employment of a Quality Assurance Engineer under the direct supervision of the
Consultant and to establish a quality assurance system including documentation.
27.
Hiring of a air-conditioned vehicle with driver for the exclusive use of the Engineer
throughout the construction period. Maximum per month mileage of
300km and only on week days between 8.00 a.m. and 6.00 p.m.
28.
Allow for scaffolding (describe)
29.
Allow for survey equipment, slump cone, cube moulds. (level – 1 No; Slump cone – 1
No; Cube moulds – 7 Nos.)
30.
Preparation of As-built drawings of A-1 size for the entire building including
Structural services and landscape.
31.
Allow for cleaning site on completion of works, including removal of all rubbish
and debris leaving the building clean internally and externally.
32.
Allow provisional sum for obtaining permits for the transport of sand. Payment will
be effected on receipt of the certified copy of the permit and receipt.
Mode of Payment for Preliminary Bill Items
a) Items 1 to 5, 32
Payment for these items shall be made only on actual subject to the maximum quoted
amount. i.e. cost shall be reimbursed with evidence up to the maximum bid amount
for the respective items. In the event of contract period being extended by the
Employer for the reasons beyond the control of contractor, the associated cost shall be
treated as a variation for the relevant items. In the event of contract period being
extended purely for the convenience of the contractor, the additional cost shall be
borne by the contractor.
b) Items 6, 7, 8, 9, 10, 11, 12, 14, 17, 22, 23, 24, 28
Contractor shall be paid 75% of the sum quoted in satisfactory completion of work,
15% of the sum quoted in monthly installment over the contract period and the
balance 10% on demolition and removal from site.
c) Items 13, 15, 16, 18, 19, 20, 21, 25, 26, 27, 29
Contractor shall be paid in monthly installments over the contract period up to the
maximum amount quoted.
d) Items 30, 31
Contractor shall be paid the sum quoted on satisfactory completion of work.
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