SPECIFICATION 904
NOISE WALLS
Copyright MAIN ROADS Western Australia
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 1 of 18
SPECIFICATION 904
NOISE WALLS
REVISION REGISTER
Date
8 Jan 2010
Clause
Number
904.2
Description of Revision
Reference to Specification
Authorised
By
SBDE
908 ANTI-GRAFFITI added
EARTHWORKS deleted
OPERATIONS added before
Clause 904.31
904.36
Paragraph 3 amended
Clause numbering and
references corrected
904.91
Contract specific clause
904.91 amended
6 Dec 08
904.34
Replaced reference to Perth
falling weight penetrometer
with Perth sand
penetrometer test
SDE
1 Aug 06
Whole
document
Complete revision of Issue
1.1 to new format
MCP
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 2 of 18
CONTENTS
Clause
Page No
GENERAL ...................................................................................................................... 4
904.01
SCOPE ........................................................................................................ 4
904.02
REFERENCES ............................................................................................. 4
904.03 – 904.05 NOT USED........................................................................................ 5
PRODUCTS AND MATERIALS ..................................................................................... 5
904.06
904.07
904.08
904.09
CONCRETE FOOTINGS, POSTS AND WALL PANELS .......................... 5
BRICKS WALL PANELS AND PIERS .......................................................... 5
MORTAR...................................................................................................... 5
REINFORCING STEEL FOR CONCRETE FOOTINGS, POSTS AND
WALL PANELS ............................................................................................ 6
904.10
LIMESTONE BLOCKS ................................................................................. 6
904.11 – 904.20 NOT USED........................................................................................ 6
SAMPLING AND TESTING ............................................................................................ 7
904.21
CONCRETE NOISE WALLS – SAMPLE PANEL ......................................... 7
904.22
BRICK NOISE WALLS – BRICKWORK UNITS ........................................... 7
904.23
BRICK NOISE WALLS - MORTAR .............................................................. 7
904.24
BRICK NOISE WALLS - SAMPLE PANEL ................................................... 8
904.25
LIMESTONE NOISE WALLS – LIMESTONE BLOCKS ............................. 8
904.26
LIMESTONE NOISE WALLS – MORTAR .................................................... 8
904.27
LIMESTONE NOISE WALLS – SAMPLE PANEL......................................... 8
904.28 – 904.30 NOT USED........................................................................................ 9
OPERATIONS ................................................................................................................ 9
904.31
EARTHWORKS ........................................................................................... 9
904.32
CLEARING AND TOPSOIL REMOVAL ........................................................ 9
904.33
EXCAVATION .............................................................................................. 9
904.34
ACCEPTANCE OF BEARING SURFACES TO CARRY LOADS................ 9
904.35
FOUNDATION IMPROVEMENT ................................................................ 10
904.36
PROTECTION OF BEARING SURFACES................................................. 10
904.37
BACKFILLING ............................................................................................ 11
904.38
UNSUITABLE AND EXCESS MATERIAL .................................................. 11
904.39
CONCRETE WORKS ................................................................................ 11
904.40
FOOTING TOLERANCES……………………………………………………. 12
904.41
STRIP FOOTING CONTROL JOINTS ……………………………………….12
904.42
CONCRETE NOISE WALL PANELS AND POSTS .................................... 12
904.43
CONCRETE WALL TOLERANCES ........................................................... 12
904.44
CONCRETE WALL PANEL SURFACE FINISH ......................................... 12
904.45
BRICKWORK ............................................................................................. 13
904.46
LIMESTONE BLOCKS ............................................................................... 15
904.47 – 904.80 NOT USED...................................................................................... 16
AS BUILT AND HANDOVER REQUIREMENTS .......................................................... 16
904.81 – 904.90
NOT USED...................................................................................... 16
CONTRACT SPECIFIC REQUIREMENTS ................................................................... 16
904.91 – 904.99
NOT USED...................................................................................... 16
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 3 of 18
SPECIFICATION 904
NOISE WALLS
GENERAL
904.01
SCOPE
1.
The work under this specification consists of all operations in
the supply and construction of noise walls including earthworks,
concrete footings and columns, and materials for brick and limestone
noise wall infill panels.
904.02
REFERENCES
1.
Australian Standards, MAIN ROADS Western Australia
Standards and MAIN ROADS Western Australia Test Methods are
referred to in abbreviated form (e.g. AS 1234, MRS 67-08-43 or WA
123). For convenience, the full titles are given below:
Australian Standards
AS 1289
AS 1379
AS 3600
AS 3700
AS 3972
Methods of testing soils for engineering purposes
The specification and supply of concrete
Concrete structures
Masonry structures
Portland cement
Australian/New Zealand Standards
AS/NZS 2699.1
Built-in components for masonry construction
AS/NZS 4455 Masonry Units and Segmental Pavers
AS/NZS 4671 Steel Reinforcing Materials
MAIN ROADS Test Methods
MRWA 134.1 Dry Density Ratio
MRWA 910.1 Chlorides and Total Soluble Salts in Soil and Water
MRWA 915.1 Calcium Carbonate Content
MAIN ROADS Specifications
Specification 201
Specification 302
Specification 801
Specification 819
QUALITY SYSTEMS
EARTHWORKS
EXCAVATION AND BACKFILL FOR
STRUCTURES
FALSEWORK
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 4 of 18
Specification 820
Specification 821
Specification 822
Specification 901
Specification 905
Specification 908
CONCRETE FOR STRUCTURES
FORMWORK
STEEL REINFORCEMENT
CONCRETE – GENERAL WORKS
LIMESTONE RETAINING WALLS
ANTI-GRAFFITI
904.03 – 904.05
NOT USED
PRODUCTS AND MATERIALS
904.06
CONCRETE FOOTINGS, POSTS AND WALL
PANELS
1.
Concrete used in the construction of footings and any other
concrete elements of noise walls shall be in accordance with the
Drawings and Specification 901 CONCRETE - GENERAL WORKS.
2.
Concrete used in the construction of posts wall panels and
any other major structural concrete elements of noise walls shall be in
accordance with the Drawings and Specification 820 CONCRETE FOR
STRUCTURES.
904.07
BRICKS WALL PANELS AND PIERS
1.
Bricks used in the construction of panels, piers and any
other brick elements of noise walls shall be clay bricks, uniform in
shape, texture, colour and size, with sharp arises, free from distortion
and other defects. Bricks shall have a minimum compressive strength
of 17MPa.
Brick
Properties
2.
Bricks shall be in accordance with the dimensions and
colours as shown on the Drawings.
Dimensions
and Colours
904.08
MORTAR
1.
Mortar shall comply with AS 3700. Mortar shall consist of 1
part of Portland Cement, 1 part of building lime, 6 parts of fine
aggregate and colouring pigments as required. The measured parts in
mixes shall be mixed mechanically to an even colour and consistency
with the minimum amount of water for workability. Admixtures, only
when specified, shall be used as specified and in accordance with the
manufacturer’s recommendations. Mortar colour shall be in accordance
with the Drawings. Colouring pigments shall be thoroughly mixed with
the cement before adding other components.
Components
and
Proportions
2.
Mortar mixed on site shall be used within 20 minutes of
mixing. Retempering of mortar shall not be permitted. Any mortar
which has begun to set prior to use shall be rejected.
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 5 of 18
904.09
REINFORCING STEEL FOR CONCRETE
FOOTINGS, POSTS AND WALL PANELS
1.
Reinforcing steel used in the construction of reinforced
concrete footings, posts and wall panels and any other reinforced
concrete elements of noise walls shall be in accordance with
AS/NZS 4671 and Specification 822 STEEL REINFORCEMENT.
Reinforcement
2.
The Contractor shall store reinforcing steel above ground
level and shall protect it from damage and deterioration.
3.
Reinforcement placed in the Works shall be clean and free
from all loose rust, mill-scale, dirt, grease, and other foreign substances
which would impair the bond between steel and concrete.
4.
After being placed in position, all reinforcement shall be
maintained by the Contractor in a clean condition until it is embedded in
the concrete.
904.10
LIMESTONE BLOCKS
1.
The stone used for the retaining walls shall be natural or
reconstituted limestone with individual blocks being free from any
foreign matter, shakes, pockets, veins or other defects and generally
sound and clean and of uniform colour and texture.
Limestone
Properties
2.
Limestone blocks shall also be in accordance with the
dimensions and colours as shown on the Drawings and conform to the
following requirements:
Quality
a) Calcium Carbonate Content;
60% minimum by
weight in accordance with WA 915.1
Dimensions
b) Dry Density;
1500 kg/m3 minimum tested by
direct measurement, the weight of a known size
cube/core after oven drying at 45 degrees Celsius for 12
hours
c) Unconfined Compression Strength;
1.7MPa for
natural limestone and 2.5MPa for reconstituted
limestone tested using a core/cube sample cut to normal
test size to be tested for crushing strength.
d) Dimensions;
As indicated on the Drawings with
a tolerance of + 15mm.
904.11 – 904.20
NOT USED
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 6 of 18
SAMPLING AND TESTING
904.21
CONCRETE NOISE WALLS – SAMPLE PANEL
1.
The Contractor shall construct an 8 m long, full height
sample panel of wall as part of the Works for the consideration of the
Superintendent to become the approved sample panel. Further
fabrication or installation of noise walls shall not commence until the
sample panel has been approved by the Superintendent.
HOLD
POINT
2.
Concrete testing shall be in accordance with Specification
820 CONCRETE FOR STRUCTURES.
904.22
BRICK NOISE WALLS – BRICKWORK UNITS
1.
The Contractor shall submit samples of brickwork units, with
the manufacturer’s certificate for approval, to the Superintendent before
placing orders. The manufacturer’s certificate shall show compressive
strength, tensile strength and absorption values of the bricks. The
samples shall indicate the full range of texture and colour and consist of
at least six units. Test certificates for compliance shall be 1 per 2000
bricks. Units built into the Works shall conform to and fall within the
range of appearance properties of the approved samples.
904.23
HOLD
POINT
BRICK NOISE WALLS - MORTAR
1.
The Contractor shall prepare samples of mortar for
brickwork for the approval of the Superintendent. Mortar used in the
Works shall conform to the approved mix and samples as specified on
the Drawings.
Samples
2.
Mortar shall be prepared in accordance with Clause 904.05.
Mortar shall be classification M3 and when tested in accordance with AS
3700 shall achieve sufficient compressive strength to meet requirements
of Table 3.1 of AS3700 for characteristic compression strength of
masonry.
Preparation
and Test
Results
3.
The Contractor shall undertake a mortar compression test at
the laboratory at the beginning of the Works to establish the
compressive strength as required by the Specification. The Contactor
shall undertake mortar compression tests using site mixes on regular
bases to maintain the required compressive strength results. Frequency
of testing on site shall be one test every 200m of wall. Method of
sampling and testing shall be in accordance with AS 3700.
Sampling
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 7 of 18
904.24
BRICK NOISE WALLS - SAMPLE PANEL
1.
The Contractor shall construct an 8m long, full height
sample panel of wall as part of the Works and for the approval of the
Superintendent. Joints shall be finished in accordance with the
Drawings. The Works shall conform to the approved sample panel.
Further brickwork associated with the Works shall not commence until
the sample panel has been approved by the Superintendent. The
sample panel may be used as a section of the noise wall.
904.25
LIMESTONE NOISE WALLS – LIMESTONE
BLOCKS
1.
The Contractor shall submit samples of limestone blocks,
with the manufacturer’s certificate for approval, to the Superintendent
before placing orders. Testing certificates for compliance to be 1 per
200 blocks for natural limestone and 1 per 500 for reconstituted
limestone. The manufacturer’s certificate shall show compressive
strength, dry density and calcium carbonate content values of the
blocks. The samples shall indicate the full range of texture and colour
and consist of at least 6 units. Units built into the Works shall conform
to and fall within the range of appearance properties of the approved
samples.
904.26
HOLD
POINT
HOLD
POINT
LIMESTONE NOISE WALLS – MORTAR
1.
The Contractor shall prepare samples of mortar for
limestone jointing for the approval of the Superintendent. Mortar used in
the Works shall conform to the approved mix and samples as specified
on the Drawings.
Samples
2.
When tested in accordance with AS 3700 mortar shall
achieve a compressive strength of at least 2.8MPa for samples taken
from site mixes and 4.2MPa for samples taken from laboratory mixes.
Test
Results
3.
The Contractor shall undertake a mortar compression test at
the laboratory at the beginning of the Works to establish the
compressive strength as required by the Specification. The Contactor
shall undertake mortar compression tests using site mixes on regular
bases to maintain the required compressive strength results. Frequency
of testing on site shall be one test every 200m of wall. Method of
sampling and testing shall be in accordance with AS 3700.
Sampling
904.27
LIMESTONE NOISE WALLS – SAMPLE PANEL
1.
The Contractor shall construct an 8m long, full height
sample panel of wall as part of the Works and for the approval of the
Superintendent. Joints shall be finished in accordance with the
Drawings. The Works shall conform to the approved sample panel.
Further Works shall not commence until the sample panel has been
approved by the Superintendent. The sample panel may be a section of
the retaining wall.
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
HOLD
POINT
Page 8 of 18
904.28 – 904.30
NOT USED
OPERATIONS
904.31EARTHWORKS
1.
This Section of the Specification covers earthworks for the
construction of the noise wall strip footings and includes excavation,
foundation improvement and backfilling. Earthworks item shall be
carried out as specified hereafter and as detailed on the Drawings.
904.32
CLEARING AND TOPSOIL REMOVAL
1.
The Contractor shall clear a sufficient width of the work site
at the wall location prior to starting excavation. Topsoil in the cleared
area shall be removed to a minimum depth of 100mm by the Contractor
and stockpiled for reuse at a location approved by the Superintendent.
The stockpiled topsoil shall be respread by the Contractor over the
cleared area to a minimum depth of 70mm and surplus removed from
site.
904.33
EXCAVATION
1.
The Contractor shall excavate to the lines and grades shown
on the Drawings. The actual dimensions for excavation shall in all
cases be no more than that required for the placement of protective
works if necessary and any working space required.
2.
back-fill.
The Contractor shall stockpile excavated material for use as
3.
Any excavated material considered unsuitable by the
Superintendent shall be removed to the nominated spoil site.
4.
If excavation below the footing is required, it shall be
backfilled and compacted with embankment quality material in
accordance with Specification 302 EARTHWORKS. The back-fill shall
be compacted to at least the density of the surrounding material if not
specified on the Drawings.
904.34
ACCEPTANCE OF BEARING SURFACES TO
CARRY LOADS
1.
When foundations have been excavated, all the soil below
the strip footings shall be compacted by the Contractor.
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Bearing
Surface
Page 9 of 18
2.
Undisturbed soil below footings shall be proof compacted by
the Contractor with a plate compactor, and disturbed soil below
foundations shall be compacted to a minimum dry density of 96 % to the
minimum depth as given on the Drawings and tested in accordance with
WA 134.1.
3.
When foundations in Perth sands have been excavated, the
Contractor shall compact the bearing surface and test the compaction in
accordance with Soil strength and consolidation tests – Determination of
the penetration resistance of a soil – Perth sand penetrometer test, as
set out in AS1289.6.3.3. The minimum acceptable blow count is 10
blows per 300 mm for the whole depth as shown on the Drawings.
4.
Testing frequency shall be 1 test per 10m of wall length, or 1
test per wall panel, whichever is the greater frequency.
5.
If the soil does not meet the requirements of this Clause, it
shall be compacted by the Contractor until it complies, unless otherwise
directed by the Superintendent.
904.35
FOUNDATION IMPROVEMENT
1.
If directed by the Superintendent, the soil shall be excavated
and either re-compacted by the Contractor if it meets the requirements
of Clause 904.33 or replaced by compacted layers of suitable fill
satisfying the requirements of Clause 904.33. The excavation shall be
carried out to a depth as directed by the Superintendent.
2.
The thickness of each layer of backfill material shall be
limited to enable the specified compaction to be obtained for the full
depth of the layer for the equipment being used and in any case shall
not exceed 300mm before compaction.
3.
The backfilled material shall be re-tested by the Contractor to
ensure compliance with Clause 904.34.
904.36
PROTECTION OF BEARING SURFACES
1.
The exposed bearing surface at the bottom of each
excavation shall be adequately protected from disturbance by the
Contractor's operations or by the action of stormwater or ground water.
Protection
2.
Any material at the bottom of an excavation which becomes
unsuitable shall be removed and replaced with fill complying with Clause
904.33 and compacted in accordance with Clause 904.34 or replaced by
additional blinding concrete.
3.
Alternatively, the disturbed surface may be lightly watered and
compacted with a hand operated mechanical compactor until it complies
with Clause 904.34.
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 10 of 18
904.37
904.37.01
BACKFILLING
GENERAL
1.
The Contractor shall backfill around foundations and noise
walls as shown on the Drawings using suitable material excavated from
the foundations unless otherwise approved by the Superintendent.
2.
The fill shall be placed carefully by the Contractor so as not
to damage the wall and concrete foundations.
3.
The Contractor shall place fill in continuous horizontal layers
of not more than 300mm uncompacted thickness and shall separately
compact each layer to a similar density to the surrounding material.
904.37.02
SUITABLE FILL MATERIAL
1.
Suitable fill material shall meet the requirements of
Specification 302 EARTHWORKS.
904.38
UNSUITABLE AND EXCESS MATERIAL
1.
All unsuitable and excess material shall be removed from
site and disposed of by the Contractor.
904.39
CONCRETE WORKS
1.
The Contractor shall carry out the construction of concrete
footings to the dimensions shown on the Drawings. Concrete Classes
used for the construction of the concrete footings shall be as shown on
the Drawings, and conform to AS 1379. The concrete construction
requirements shall comply with Specification 901 CONCRETE GENERAL WORKS.
2.
The Contractor shall advise the Superintendent of the time
and date of concrete placement not less than 24 hours prior to any
proposed placement.
904.40
HOLD
POINT
FOOTING – TOLERANCES
a) Variation of dimensions in plan and elevation
± 15mm
b) Misplacement of eccentricity of centreline
± 10mm
c) Variation in specified level
± 10mm
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 11 of 18
904.41
STRIP FOOTING CONTROL JOINTS
1.
The Contractor shall construct construction joints at
maximum intervals of 16m and at the locations shown on the Drawings.
2.
Materials used for the joints (such as dowels, grease, caps
and Fortecon layers) and installation details shall be in accordance with
the Drawings.
904.42
CONCRETE NOISE WALL PANELS AND POSTS
1.
The Contractor shall carry out the construction of major
concrete noise wall elements such as panels and posts to the
dimensions shown on the Drawings. Concrete Classes used for the
construction of the concrete elements shall be as shown on the
Drawings, and conform to AS 1379. The concrete construction
requirements shall comply with Specification 820 CONCRETE FOR
STRUCTURES.
904.43
CONCRETE WALL TOLERANCES
1.
Concrete noise walls shall be constructed to the following
tolerances:
a) Variation from vertical or specified batter
± 10mm
b) Misplacement or eccentricity of centreline
± 10mm
c) Variation from specified level of surfaces
± 10mm
d) Horizontal deviation (bow)
edge
904.44
+ 10mm over a 2m straight
CONCRETE WALL PANEL SURFACE FINISH
1.
Concrete wall panel surface shall be Class 2 grey finish in
accordance with AS 3610 in the first instance unless specified otherwise
on the Drawings.
Initial
Surface
Finish
2.
Further surface treatment such as painting shall be
preceded by cleaning by water blasting.
3.
Further surface treatment such as painting system, patterns,
textures etc. shall be specified in detail by the designer to the specific
individual requirements of the Project.
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Further
Surface
Treatment
Page 12 of 18
904.45
904.45.01
BRICKWORK
GENERAL
1.
The Contractor shall stack bricks on supports clear of the
ground and keep them dry and free from dust, dirt and staining and shall
cover them with tarpaulins or plastic sheeting.
2.
Bricks shall not be laid in wet weather.
3.
The Contractor shall set out the Works according to the
Drawings with no part rising more than 1000mm above the adjacent
unfinished brickwork. Corners and other advanced rising work shall be
racked by the Contractor.
Setting Out
4.
Bricks moved after initial laying shall be re-laid in fresh
mortar by the Contractor.
5.
New brickwork shall be temporarily braced by the Contractor
to withstand lateral loads.
6.
The Contractor shall build brickwork having 76mm bricks to
a gauge of 7 courses to 600mm.
7.
The Contractor shall build all walls in stretcher bond unless
otherwise shown on the Drawings.
Brickwork
Bond
8.
The Contractor shall lay the first bed joint on footings, and
solid blocks on a full bed of mortar.
904.45.02
JOINTS
1.
The Contractor shall lay bricks on a full bed of mortar with
frogs (if any) uppermost and shall fill perp ends solidly with mortar.
2.
The Contractor shall form joints uniformly in external
facework to suit gauge and to match existing, unless otherwise
specified, and shall work joints with the jointing tool to a dense, smooth
finish.
3.
The Contractor shall cut off joints flush in walls that are not
exposed to view and will not be rendered or plastered. The Contractor
shall rake out joints to 5mm depth in brickwork to be rendered or
plastered. The Contractor shall roll joints in facing bricks or walls
exposed to view.
904.45.03
Joint
Finishes
FACEWORK
1.
The Contractor shall set out face work to suit bends and to
avoid cutting of bricks.
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Facework
Page 13 of 18
2.
The Contractor shall start face work approximately two
courses below adjacent finished ground level.
3.
The Contractor shall lay face brick to avoid changes of
colour beyond the range of bricks in the approved sample panel.
4.
The Contractor shall keep perp ends in alternate courses in
vertical alignment.
904.45.04
DAMP - PROOF COURSE
1.
The Contractor shall use Cementaid Everdure Caltite
additive to provide a damp-proof course.
2.
The Contractor shall mix the additive with the mortar and
apply it from the footing to the top joint of the first course immediately
above ground.
904.45.05
Location
BRICKWORK CLEANING
1.
The Contractor shall clean brickwork on completion, and
shall take care to protect adjacent surfaces from cleaning solutions.
2.
The Contractor shall not apply cleaning solutions to joints,
and shall not scrub joints.
3.
The Contractor shall consult the brick manufacturer before
attempting to remove unusual stains and shall obtain approval from the
Superintendent before commencing cleaning.
Brick Stains
4.
The Contractor shall wash brickwork with water after
cleaning and shall mop off surplus water with a clean sponge.
5.
To remove mortar droppings from clay brickwork, the
Contractor shall drench the brickwork with water before applying the
cleaning solution.
904.45.06
BRICK MASONRY CONTROL JOINTS
1.
The Contractor shall install control joints at a maximum
distance of 16m or at the locations shown on the Drawings.
2.
Control joints shall consist of galvanised expansion ties,
backing material and sealant as specified on the Drawings.
3.
Materials used for masonry control joints and installation
details shall be in accordance with the Drawings.
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Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 14 of 18
904.46
904.46.01
LIMESTONE BLOCKS
GENERAL
1.
The Contractor shall stack limestone blocks on supports
clear of the ground and keep them dry and free from dust, dirt and
staining and shall cover them with tarpaulins or plastic sheeting.
2.
Limestone blocks shall not be laid in wet weather.
3.
The Contractor shall set out the Works according to the
Drawings.
4.
The first course of units shall be laid on top of the prepared
bedding sand and be levelled and checked for alignment.
5.
Additional courses shall be laid in squared work with joints
fully mortared and levelled and checked for alignment.
6.
904.46.02
The walls shall be laid with a front face batter of 1H:50V.
JOINTS
1.
The Contractor shall lay blocks on a full bed of mortar and
shall fill perp ends solidly with mortar.
2.
Wall Joints
Mortar joints shall be nominally 20mm in width.
3.
The joint shall be raked back from the block face so that the
joint can be faced at a later date with cream coloured mortar to match
the limestone colour.
904.46.03
FACING
1.
The Contractor shall prepare trial mortar mixes for facing to
match the limestone colour. Trial mortar mixes shall be prepared until a
suitable match is obtained as approved by the Superintendent.
2.
The facing shall occur in a single operation after the wall has
been completed and all movement has been taken up.
3.
The exposed face shall be cleaned of all excess mortar as
the work progresses.
904.46.03
FINISHING TOLERANCES
1.
Limestone retaining walls shall be laid to the following
tolerances:
a) Horizontal position of any element in plan
b) Maximum deviation from plumb
MAIN ROADS Western Australia
Contract xxx/xx
+ 25mm
+ 15mm per 3m height
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 15 of 18
c) Maximum horizontal deviation (AS 3700 App H) + 10mm
over a 2m edge
d) Deviation in any bed joint from horizontal
in any 10m or + 15mm total
+ 10mm
e) Deviation in thickness of bed joint or perp end
+ 10mm
f) Maximum step between blocks
block to block
+ 10mm
904.47 – 904.80
NOT USED
AS BUILT AND HANDOVER REQUIREMENTS
904.81 – 904.90
NOT USED
CONTRACT SPECIFIC REQUIREMENTS
904.91 – 904.99
NOT USED
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 16 of 18
SPECIFICATION 904 GUIDANCE NOTES
DELETE THESE GUIDANCE NOTES FROM FINAL DOCUMENT AFTER USING FOR
REFERENCE
All edits to downloaded TDP documents shall be tracked (most word processing
software allows this to be done automatically). Deletions shall be struck through e.g.
example. Insertions shall be in italics e.g. example. If all information relating to a clause
is deleted then the clause number should be retained and the words "NOT USED"
should be inserted.
The proposed documents with tracked changes shall be submitted to the Project
Manager for review, prior to printing the final batch of documents. When this final
printing is carried out, the tracked changes option is to be turned off.
The Custodian of this specification is the Senior Design Engineer.
-------------------------------------------------------------------------------------------------------------1.
GENERAL
This Specification has been written to cover concrete, brick and limestone noise walls.
If only one type is specified in the Works, delete other clauses relating to the other wall
types.
2.
LOADS:
CLAUSE 904.34 ACCEPTANCE OF BEARING SURFACES TO CARRY
NOTE: This is for granular materials. Alternative Specification may be required for
other materials
3.
CLAUSE 904.44 CONCRETE WALL PANEL SURFACE FINISH:
Need to insert the detailed surface finish treatment based on the contract specific
requirements at 904.44.3 or delete sub-clause 904.44.3.
4.
CLAUSE 904.91 ANTI-GRAFFITI PAINT
Insert clause 904.91 under CONTRACT SPECIFIC REQUIREMENTS if required.
CONTRACT SPECIFIC REQUIREMENTS TO ADD OR DELETE
The following clauses are to be placed under the CONTRACT SPECIFIC
REQUIREMENTS as required.
904.91
ANTI-GRAFFITI COATING SYSTEMS
1.
Anti-graffiti paint coating systems shall be non-sacrificial (except where the
coating is to be installed on a limestone substrate) clear or pigmented coating to a
specified colour and comply with the requirements of Specification 908 ANTI-GRAFFITI.
2.
The Contractor shall apply anti-graffiti paint only to the roadside face of the
noise wall or as specified on the Drawings.
MAIN ROADS Western Australia
Contract xxx/xx
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 17 of 18
SPECIFICATION AMENDMENT CHECKLIST
Specification Name: No: 904 Revision No: ______Title: NOISE WALLS
Project Manager: Name: _______________Signature: _____________Date:______
Checked By: Name: _______________Signature: _______________Date:______
Contract No: ______Contract Description: __________________________________
ITEM
DESCRIPTION
Note:
approved.
SIGN
OFF
All changes/amendments must be shown in Tracked Change mode until
1.
Project Manager has reviewed Specification and identified
Additions and Amendments.
2.
CONTRACT SPECIFIC REQUIREMENTS addressed? –
Contract specific materials/products/clauses added? (Refer
Specification Guidance Notes for guidance).
3.
Any unlisted Materials/Products proposed and approved by the
Project Manager? – if “Yes” provide details at 15.
4.
Standard Clauses amended? – MUST SEEK approval from
MCP.
5.
Clause deletions shown as ‘NOT USED’.
6.
Appropriate INSPECTION & TESTING parameters included in
Spec 201 (Test Methods, Minimum Testing Frequencies
verified).
7.
ANNEXURES completed (Refer Specification Guidance Notes).
8.
HANDOVER and AS BUILT requirements addressed.
9.
Main Roads QS has approved changes to SMM.
10.
Project Manager certifies completed Specification reflects intent
of the design.
11.
Completed Specification – independent verification arranged by
Project Manager
12.
Project Manager’s review completed.
13.
SPECIFICATION GUIDANCE NOTES deleted.
14.
TABLE OF CONTENTS updated.
15
Supporting information prepared and submitted to Project
Manager.
Further action necessary:
Signed:
MAIN ROADS Western Australia
Contract xxx/xx
(Project Manager)
Date: _______________
Specification 904 Noise Walls
Document 04/10151 Issue 13/01/10
Page 18 of 18