DESIGN CONCRETE
SYSTEMS LTD.
SOFTSOUND™ ABSORPTIVE NOISE BARRIER SYSTEM
GENERAL NOTES
1.
DESIGN
1.1
The structure and its components have been designed in accordance with the
Ontario Building Code (OBC).
1.2
All dimensions and sizes are given in (mm) millimeters unless noted otherwise.
2.
LOADING
2.1
Reference Wind Pressure = 535 Pa, 1/25 as per CAN/CSA S6-06 (R2012)
3.
CONCRETE
3.1
All concrete shall conform to CAN/CSA-A23.3-04 (R2010)
3.2
Concrete strength at 28 days shall not be less than 40 MPa
Cast-in place footings- Minimum 30 MPa as per specifications
4.
REINFORCING STEEL
4.1
All reinforcing steel shall be deformed bars conforming to CAN/CSA-G30.18-M92
(R2002) having a minimum yield strength of 400 MPa.
4.2
Reinforcing bars are to be epoxy coated unless noted otherwise.
5.
STRUCTURAL STEEL
5.1
All structural steel to comply with CAN/CSA-S16-09 and CAN/CSA-S6-06.
5.2
All structural steel shall be CAN/CSA-G40.20(or G40.21)-M92 GRADE 350W.
5.3
All components to be hot dip galvanized after fabrication in accordance with
ASTM A123M-09.
5.4
All welds shall conform to CSA W59 and CSA W47.1.
5.5
Steel posts to which special attachments are welded shall be hot dip galvanized
after fabrication according to the requirements of ASTM A123M-09.
SOFTSOUND ABSORPTIVE NOISE BARRER SYSTEM
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DESIGN CONCRETE
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5.6
Where welding on site is required, the galvanized surfaces which are abraded or
site welds shall be cleaned and repaired using soldering or thermal spray in
accordance with OPSS 911.
6.
FOOTINGS
6.1
Depth and diameter of footing shafts were designed in accordance with CAN/
CSA S6-06. Clause 5-7.2
6.2
Footing concrete to be cast entirely against undisturbed soil.
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DESIGN CONCRETE
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1.
GENERAL
1.1
This work includes the design, manufacture, delivery and erection of the
SoftSound ™ Absorptive Noise Barrier System. The manufacturer of
SoftSound™ is Design Concrete Systems Ltd. P.O. Box 839, 40 Birch Street,
Seaforth, Ontario, Canada N0K 1W0
1.2
The barrier system and its components shall be designed in accordance with the
requirements of the “Canadian Highway Bridge Design Code”. The “Reference
Wind Pressure” shall be specified in the code for the locality of the Noise Barrier.
1.3
The manufacturer of the barrier system shall prepare detailed layout and
fabrication drawings including pertinent specifications thereto, together with the
complete engineering calculations. The manufacturer shall submit to the
Contractor or Owner’s Representative six (6) sets of drawings and specifications,
sealed by a Licensed Professional Engineer, for approval prior to
commencement of manufacture or construction.
1.4
The Contractor or Owner’s Representative shall establish the alignment of the
wall, the top of wall elevations and final ground line elevations at the bottom of
the wall. The manufacturer shall use these elevations to develop the layout and
fabrication drawings including complete elevations of each wall indicating top and
bottom of wall elevations. The final ground elevations and wall alignments
established in the field shall be protected by the Contractor for the duration of the
project and shall not be adjusted without prior approval of the Engineer.
1.5
The Contractor or Owner’s Representative shall carry out site investigations to
determine soil parameters, water tables, location of underground services and
above grade obstructions. The manufacturer shall use these parameters to
determine the depths, sizes and locations of footings.
2.
MATERIALS
2.1
Panel Construction: SoftSound™ panels shall be of composite construction,
with sound absorptive facing on one or both sides. The panels will have a
reinforced concrete core, manufactured to the dimensions and specifications
shown on the contract drawings. The panel design shall be sealed by a Licensed
Professional Engineer.
2.2
Acoustical Characteristics: SoftSound™ panels shall be absorptive on one or
both faces. The Noise Reduction Coefficient (NRC) shall be greater or equal to
0.7 as determined in accordance with ASTM C423-09a “Standard Test Method
for Sound Absorption and Sound Absorption Coefficients by the Reverberation
Room Method”. The Sound Transmission Class (STC) of the panels shall be
equal or greater than 32 as determined in accordance with ASTM E90-09.
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DESIGN CONCRETE
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2.3
Aesthetics: SoftSound™ panel face colours and textures shall be as specified
in the Contract Documents. (Owner to specify colours, percentages of each
colour, colour pattern, texture, on one or both sides and percentage of textured
panels)
2.5
Steel Posts: Steel posts shall be hot rolled wide flange structural sections in
accordance with shapes, sizes, details and method of connection as shown on
the drawings. All structural steel work to comply with CSA Standard S 16 and
grade of steel shall be G40.21-M 350W. All welds shall conform to CSA
Standard W59 and CSA Standard W47.1. All steel components to be hot dip
galvanized after fabrication in accordance with ASTM A123M-09. The post
design shall be sealed by a Licensed Professional Engineer.
2.6
Post Footings: Concrete in augured footings shall be minimum 20 MPa and in
non-standard, engineered footings, it shall be 30 MPa, all in accordance with
OPSS 1350.
3.
CONSTRUCTION
3.1
Site Grading and Preparation: Grading, (cut and fill) and berm construction
which is associated with the barrier installation shall be completed to within
25mm below the bottom of the barrier wall prior to construction of the barrier
footings. All grading shall be in accordance with OPSS 206. Berms shall have a
profile with a minimum 3.0m flat top and maximum side slope of 3:1. After
completion of wall panel installation, final grading shall be to bottom of wall and
there shall be no visible gaps between bottom of wall and top of final grade. Tree
pruning and removal shall be kept to a minimum. Materials excavated from
footing holes, if acceptable, may be deposited on the adjacent terrain and spread
in uniform layers. Surplus excavated material shall be disposed of at the
contractor’s expense.
Alignment and bottom elevations of wall shall be clearly marked and staked prior
to commencing with construction of wall footings. Grade stakes shall be placed
at approximately 25m on center and at all grade changes, wall steps, starts and
ends of wall and alignment changes. Grade stakes shall show the following
information: station number, bottom of wall elevation, cut or fill dimension and
offset to centerline of wall. Below grade service lines (hydro, telephone, gas,
water, drainage, etc.) located within 1.0m of the noise barrier wall or footings,
shall be clearly marked by stakes.
3.2
Footings: The depth, type and size of the footings shall be shown on the
drawings and shall be designed and approved by a Licensed Professional
Engineer with reference to the soil strength parameters and site conditions
supplied by the Owner’s Representative for the project. The concrete in the
footings shall be cured for a minimum of 5 days before work which places stress
on the posts may be carried out. The tops of all footings are to be shaped and
leveled to provide full horizontal seating of the bottom panels and the remaining
surface of the top footing shall be domed to allow the shedding of water.
SOFTSOUND ABSORPTIVE NOISE BARRER SYSTEM
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DESIGN CONCRETE
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3.2.1 Cylindrical Footings: Concrete for footings in augured holes shall be cast
entirely against undisturbed soil. Should liners be required, concrete shall be
poured into the liner and the liner withdrawn as pouring of the concrete
progresses.
3.2.2 Non-Standard Engineered Footings: Where site conditions dictate
special footings in large hole excavations (e.g. Other than augured holes), the
non-standard footing shall be designed and sealed by a Licensed Professional
Engineer. The excavation shall be backfilled with granular material and
compacted, all in accordance with OPSS 501.
3.2.3 Stepped Footings: Where grade changes require the bottom of the wall to
be stepped, the top of the footing shall be constructed as shown on the drawings
and as per Manufacturer’s recommendations.
3.3
Posts: The posts shall be installed plumb to within +/- 10mm of vertical in 5.0m.
They shall be located to the lines and grades specified on the drawings to within
a tolerance of +/- 10mm. Any accidental coating of concrete on the above grade
surfaces of the posts shall be washed off on the same day of installation.
3.3.1 Steel Posts: A concrete leveling pad shall be poured into the bottom of the
augured hole 4 hours prior to inserting the concrete post. This pad shall serve to
support the concrete post at its proper elevation and alignment during pouring
and vibrating of the footing concrete around the inserted post. Galvanized
surfaces which are abraded shall be cleaned and the abraded surfaces touched
up using soldering or thermal spraying in accordance with OPSS 911.
3.4
Panels: The SoftSound™ panels shall be installed according to type, colour,
texture and length as shown on the drawings and in accordance with
Manufacturer’s recommended practices. Each panel is identified as to its type
and orientation in the Noise Barrier Wall. The contractor shall take care and
provide adequate protection when handling, moving, and storing the panels to
prevent staining, marking, chipping or spalling. To lift and place the SoftSound™
panels, only the lifting device provided by the manufacturer or an approved
equivalent shall be used. Touch up and repair is at the contractor’s expense and
shall be carried out in accordance with the Manufacturer’s recommendations or
at the Engineer’s direction. The bottom panel shall be fully seated on the footing.
Top of footing shall be free of foreign material, ice, snow or water. Horizontal
joints of adjacent panels shall be lined up to a vertical tolerance of +/- 4mm.
Where vertical adjustments are required for alignment, a mortar base shall be
used. Intermediate panels shall fit tight to the panel below. The tongue and
groove detail shall mesh fully, be free of foreign material, ice or snow and there
shall be no visible gaps.
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DESIGN CONCRETE
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3.5
Noise Barriers on Structures: Flashing shall be installed according to the
details in the contract and in such a manner that water will not pond on the
structure. Upon completion of the flashing installation the Contractor shall apply
silicone sealant according to the manufacturer’s recommendations and as
follows:
a) all surfaces to receive sealant shall be clean and dry;
b) the flashing surface is to be wiped with Naphtha to remove oils and dirt; and
c) deleterious material is to be removed from the concrete surface by light wire
brushing.
3.6
Expansion Joints: When the noise barrier alignment traverses structure
expansion joints, the noise barrier shall be designed and installed so as to
accommodate movement of the noise barrier panel without placing undue stress
on the structure and the noise barrier installation, or reducing acoustical
attenuation. The joints in the noise barrier shall match the size and location of the
structure joints.
3.7
Overhead High Voltage Lines: Where the potential of arcing exists due to the
close proximity of existing overhead high voltage lines, metal noise barrier panels
and girts must be grounded in accordance with the requirements of OPSS 609.
4.
QUALITY ASSURANCE
4.1
Aesthetics: The visual appearance of the Noise Barrier Panels, in terms of
colour, pattern and texture, shall be uniform when viewed at a distance of 15m
from the face of the wall. Any visual blemishes shall be repaired and touched up
as per Manufacturer’s specifications.
4.2
Performance: The contractor shall, at his expense, supply to the Owner or the
Owner’s Representative, one panel per thousand panels supplied or a minimum
of three panels for testing to verify structural strength, sound reflection, weather
resistance and durability in salt scaling and freeze thaw.
5.
MEASUREMENT FOR PAYMENT
5.1
Measurement for the above items is by Plan Quantity as may be revised by
Adjusted Plan Quantity, for the length in meters, of the specified height of the
noise barrier. Transitions between different barrier heights will form part of the
higher barrier.
6.
BASIS OF PAYMENT
6.1
Payment of the contract price(s) for the above tender item(s) shall be full
compensation for labour, equipment and materials necessary to construct and
complete the noise barrier work and to provide test panels upon request.
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DESIGN CONCRETE
SYSTEMS LTD.
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