624.1General Description
This work includes furnishing and installing a noise barrier wall, single and double steel doors and concrete pads according to this Specification and conforming to the locations, dimensions, lines, grades, and material type shown on the Plans. Types of noise wall material include the following: Type A Concrete masonry units Type B Interlocking steel panels Type C Precast concrete panels Type D Treated timber panels Type F Glass reinforced thermoset composite structural panels Type G Precast autoclaved aerated concrete (PAAC) panels Type H Absorptive panels Type I Reflective panels If a material type is not specified elsewhere in the Contract, then the noise barrier walls shall be constructed using precast concrete panels. Interlocking steel panels shall be used where a lighter weight material is necessary such as on bridges and retaining walls. A decision to use a noise barrier wall material other than precast concrete panels or interlocking steel panels, as noted above, will require written approval from the GDOT Chief Engineer. 624.1.01 Definitions General Provisions 101 through 150. 624.1.02 Related References
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AASHTO LRFD Bridge Design Specifications AASHTO LRFD Bridge Construction Specifications GDT 7 GDT 20 GDT 21 GDT 24a GDT 24b GDT 59 GDT 67 QPL 9 QPL 42 QPL 53 QPL 90 Federal Specification QQ-S-763-C AASHTO ASTM M 31/M 31M M 32/M 32M M 111/M 111M M 270/M 270M A 153/153M A 366 A 526 A 568 A 569 A 572 A 591 A 653/653M A 792/792M B 695 B 766 C 90 C 1693 D 638 D 695 D 790 D 792 D 6386 D 2583 E 90 G 154 624.1.03 Submittals Submit to the Engineer shop drawings for noise barrier walls and steel doors for review and approval. Submission should be made electronically in a portable document format (pdf) and include an index. Format all drawings to fit 11 in. x 17 in. (279 mm x 432 mm) paper. Present calculations to fit 8.5 in. x 11 in. (216 mm x 297 mm) paper.
revisions are necessary, to the Engineer for review and approval. Submit this information prior to the creation of noise barrier wall shop drawings.
The minimum requirements are: • Complete elevation view showing the top and bottom elevations, the required wall envelope, the roadway grade, top of side barrier, top and bottom of footing of side barrier and ground line at the wall. • Diameter and depth of caissons at each post • Post size • Transitions between ground mounted and structure mounted noise barriers • Complete plan view with dimensions, stations and offset 1019 1019 1019 1019 1019
Prepare Shop Drawings for a Single Steel Door and a set of Double Steel Doors. Show all details necessary for general construction, configurations, jointing methods, reinforcement, and anchorage meeting the following requirements: • Double steel exterior fire doors – 96 in. (2,438 mm) height by 36 in. (914 mm) width with latch bolt throws with two adjoined concrete pads - 18 ft. (5.49 m) length by 4 ft. (1.22 m) width by 6 in. (152 mm) depth concrete pad and 10 ft. (3.05 m) length by 4 ft. (1.22 m) width by 6 in. (152 mm) depth concrete pad • Single steel exterior door –84 in. (2,134 mm) height by 36 in. (914 mm) width with latch bolt throws with two adjoined concrete pads - 10 ft. (3.05 m) leng th by 4 ft . (1.22 m) width by 6 in. (152 mm) depth concrete pad and 4 ft. (1.22 m) length by 4 ft. (1.22 m) width by 6 in. (152 mm) depth concrete pad • Latch bolt throws - 38 in. (965 mm) to centerline of door knobs from top of finished concrete pad.
624.2Materials
Ensure other materials not listed herein meet the requirements of the appropriate Specification to which they pertain. Noise barriers shall meet the requirements of the following Specification, unless specified otherwise on the Plans or in the Special Provisions. For a list of approved noise barriers, see QPL 90. 624.2.01 Wind Loading Noise barrier panels shall be designed to the following wind speeds using a 700 Mean Recurrence Interval (MRI) for the listed counties: • 140 mph (Coastal 2): Bryan, Camden, Chatham, Effingham, Glynn, Liberty, McIntosh • 130 mph (Coastal 1): Brantley, Bulloch, Charlton, Evans, Long, Screven, Tattnall, Wayne • 120 mph (Piedmont 2): Appling, Bacon, Brooks, Burke, Candler, Clay, Clinch, Decatur, Early, Echols, Emanuel, Grady, Jeff Davis, Jenkins, Lowndes, Miller, Pierce, Seminole, Thomas, Toombs, Ware • 115 mph (Piedmont 1): For all counties not listed above The wind speeds and associated counties listed above result in the following minimum design wind pressures: Regions Strength III Service I Ground mounted Structure mounted
Piedmont 1 24 29 15 Piedmont 2 38 44 15 Coastal 1 44 52 15 Coastal 2 59 70 15 624.2.02 Noise Reduction Noise barrier panels shall meet or exceeds the following criteria related to noise reduction: • Type A, B, D, F, G and I barriers must achieve a minimum weighted sound transmission loss of 20 dBA. The transmission or loss results must be based on the generalized truck spectrum when tested according to ASTM E 90. • Type H barriers must achieve a minimum noise reduction coefficient (NRC) of 0.8 and a minimum sound transmission class (STC) of 30 when tested according to ASTM C423. 1020 1020 1020 1020 1020
624.2.03 Component Materials
Specifications, Section 15.
Use cold formed configured steel panels that meet the following requirements:
Class 2 with a minimum thickness of 0.029 inches (0.74 mm)
adequately according to the manufacturer’s specifications
fasteners when connected to another panel and held in a vertical or horizontal position
AZ50 (AZM150) weight of 55% aluminum-zinc alloy according to ASTM A 792/792M.
Use one of the following coatings:
1) Apply the coating system (including primer) at a total minimum film thickness of 1 mil (0.03 mm) per coated side. 2) Cure the polyvinylidene fluoride film to at least 0.8 mil (0.02 mm) film thickness.
(0.04 mm) coated on both sides. 1) Have the coating applied at the factory to thoroughly cleaned and pretreated galvanized steel according to ASTM D 6386. 2) Laminate the coating to the galvanized steel using heat and adhesive to form a uniform and durable coating pigmented to obtain optimum color performance. 3) Use a color from the Federal Standard Color Number indicated on the Plans. Ensure that caulking is color pigmented to match the wall color specified.
Use posts that meet the following requirements:
111/M 111M
2 (610 g/m²) on all sides
affixed near one end of each post. 1021 1021 1021 1021 1021
Use flashing and caps for steel walls of the same material and color coating as the panels. Fasten steel flashing and caps with self-tapping screws. Ensure that A-1 screws are Class #410 Stainless Steel and conform to Federal Specification QQ-S-763-C, or are cadmium coated according to ASTM B 766.
Attach panels to posts using a powder-actuated fastening system. Ensure fasteners are stainless steel or hot- dip galvanized as per ASTM A 153 Class C or have a mechanically deposited zinc coating as per ASTM B 695 Class 50.
Use precast concrete panels meeting the following requirements: Class AA Concrete or Self-Consolidating Concrete (SCC) Reinforcing AASHTO M 31/M 31M and M 32/M 32M If SCC is used the following shall be met: wet/cement ratio 0.40 min 3500 psi Spread Slump 24” ± 2”, Air Entrainment – min 3.5% to max 6.5%
Use posts that meet the following requirements:
111/M 111M
affixed near one end of each post.
Grade 36 (F1554M), A563 (A563M) and F436 (F436M), except use rolled threads meeting 8 UN/8 UNR thread profile according to ANSI B1.1. Use bolts with Class 2A threads, and nuts with class 2B threads. Galvanize all components in accordance with ASTM A 123/A123M or A153/A 153M, whichever is applicable.
Use elastomeric bearing pads that conform to Section 885.
Noise Barrier Walls See QPL 90 Class A Concrete Section 500 Lumber and Timber Section 860 Preservative Treatment of Timber Products Section 863 1022 1022 1022 1022 1022
PROPERTY MINIMUM VALUE TEST METHOD Flexural Modulus 2,200,000 psi (15200 MPa) ASTM D 790 Flexural Strength 70,000 psi (480 MPa) ASTM D 790 Tensile Strength 65,000 psi (450 MPa) ASTM D 638 Tensile Modulus 4,500,000 psi (31000 MPa) ASTM D 638 Elongation 1.5% ASTM D 638
Compressive Strength 60,000 psi (410 MPa) ASTM D 695
Barcol Hardness 50 ASTM D 2583
Specific Gravity 1.86 ASTM D 792
sorted and graded ground tire rubber (0.25 + 0.025 inch (6.4 + 0.6 mm)).
Use posts that meet the following requirements:
111/M 111M
(610 g/m²) on all sides
affixed near one end of each post.
Grade 36 (F1554M), A563 (A563M) and F436 (F436M), except use rolled threads meeting 8 UN/8 UNR
thread profile according to ANSI B1.1. Use bolts with Class 2A threads, and nuts with class 2B threads.
Galvanize all components in accordance with ASTM A 123/A123M or A153/A 153M, whichever is
applicable.
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cement, fine aggregate, water, gypsum, lime, and an expansion agent. After setting, and before hardening, the
PAAC is machine cut to the required size, then steam-cured under pressure in an autoclave. Use PAAC that
meets the following physical requirements:
accordance with ASTM C 1693, with no single specimen having a compressive strength of less than 580
psi (4000 kPa).
(544 kg/m
) and 41 lb./ft. (656 kg/m
) when tested in
accordance with ASTM C 1693
Use posts that meet the following requirements:
111/M 111M
(610 g/m²) on all sides
affixed near one end of each post.
same topcoat color on both the PAAC panels and the steel supports. Submit independent laboratory test
results for 1500 hours of accelerated weathering in accordance with ASTM G 154. Submit results that show
ratings of at least 9 in the following categories: color change, chalking, checking, cracking, blistering, flaking
and rusting. Submit a certification stating that the PAAC topcoat is graffiti resistant.
Grade 36 (F1554M), A563 (A563M) and F436 (F436M), except use rolled threads meeting 8 UN/8 UNR
thread profile according to ANSI B1.1. Use bolts with Class 2A threads, and nuts with class 2B threads.
Galvanize all components in accordance with ASTM A 123/A123M or A153/A 153M, whichever is
applicable.
certified wind load test report.
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Use posts that meet the following requirements:
111/M 111M
(610 g/m²) on all sides
affixed near one end of each post.
Grade 36 (F1554M), A563 (A563M) and F436 (F436M), except use rolled threads meeting 8 UN/ 8UNR
thread profile according to ANSI B1.1. Use bolts with Class 2A threads, and nuts with class 2B threads.
Galvanize all components in accordance with ASTM A123/A123M or A 153/A 153M, whichever is
applicable.
pertain.
certified wind load test report.
Use posts that meet the following requirements:
111/M 111M
(610 g/m²) on all sides
affixed near one end of each post.
F1554 Grade 36 (F1554M), A563 (A563M) and F436 (F436M), except use rolled threads meeting 8
UN/8 UNR thread profile according to ANSI B1.1. Use bolts with Class 2A threads, and nuts with
class 2B threads. Galvanize all components in accordance with ASTM A 123/A123M or A153/A
153M, whichever is applicable.
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Ensure materials meet the following:
A-569 and ASTM A-568.
complying with ASTM A526, with ASTM A653, G-60 zinc coating, mill phosphatized. Use for all exterior
units.
into exterior walls, complying with ASTM A-153, Class C or D as applicable.
Use one of the following coatings:
1) Apply the coating system (including primer) at a total minimum film thickness of 1 mil (0.03 mm) per
coated side.
2) Cure the polyvinylidene fluoride film to at least 0.8 mil (0.02 mm) film thickness.
(0.04 mm) coated on both sides.
1) Have the coating applied at the factory to thoroughly cleaned and pretreated galvanized steel
according to ASTM D 6386.
2) Laminate the coating to the galvanized steel using heat and adhesive to form a uniform and durable
coating pigmented to obtain optimum color performance.
3) Use a color from the Federal Standard Color Number indicated on the Plans.
624.2.04 Delivery, Storage, and Handling
General Provisions 101 through 150.
624.3Construction Requirements
624.3.01 Construction
Perform the following work according to the Specifications:
When necessary, clear and grub according to Section 201 as applicable.
Perform excavation, borrow, and embankment according to Section 205, Section 206, Section 208, or Section
210. The scope and dimensions of the work are shown on the Plans.
Perform grassing according to Section 700, as specified on the Plans.
Plant vine, shrub, and trees according to Section 702 as specified on the Plans.
When items are shown on the Plans but are not covered in this Specification, the Plans and Standard
Specifications to which they pertain govern the work. 10261026102610261026
Follow these requirements to construct each type of wall:
When using hollow load bearing concrete masonry units (concrete block) to construct the walls, work
according to the notes, details, and dimensions on the Plans, including footings, reinforcement, and plaster
coat when required.
When using precast concrete panels:
Engineer.
and cured the same as the panels and from inspection during manufacture.
Have the panel manufacturer furnish facilities and assistance to sample and test quickly and
satisfactorily.
supplemented by hand tamping and rodding to force the concrete into the corners of the forms to
eliminate stone pockets, cleavage planes, and air bubbles.
specified. Provide a similar architectural finish to the opposite side of the barrier unless noted
otherwise in the plans. Provide the same or similar finish on extensions of existing noise walls or
additions of new noise walls along a corridor with existing noise walls.
Moisture, (wet cure) long enough for the concrete to develop the specified compressive strength.
1) Ensure that the curing period is at least 72 hours under normal summer temperature conditions.
In colder weather extend the curing period, as directed by the Engineer
2) Protect the panels from freezing from the time the concrete is placed until curing is complete.
3) Instead of the wet cure method, steam cure the panels as specified in Subsection
865.2.01.B.2.g.(2) if desired.
NOTE: Even with the Inspector’s acceptance at the precast yard, panels can still be rejected at
the erection point if they are damaged.
and tighten the restraining bolts. Do not stack more than two bearing pads at the panel support. Do not
use concrete blocks at the panel supports to make up for grade difference on top of foundation.
dirt or stains. 10271027102710271027
Install in accordance with manufacturer’s recommendations and plan details. Do not install walls with burns,
discolorations, cracks, or other objectionable marks that would adversely affect the performance of the
system.
Install in accordance with manufacturer’s recommendations and Plan details. Do not install walls with burns,
discolorations, cracks, or other objectionable marks that would adversely affect the performance of the
system.
cured the same as the panels and from inspection during manufacture. Have the panel manufacturer
furnish facilities and assistance to sample and test quickly and satisfactorily.
side of the barrier, provide a similar finish to the opposite side unless noted otherwise in the plans.
by hand tamping and rodding to force the concrete into the corners of the forms to eliminate stone
pockets, cleavage planes, and air bubbles.
that the units meet the physical requirements of Subsection 624.2.03.F.1.
NOTE: Even with the Inspector’s acceptance at the precast yard, panels can still be ejected at
the erection point if they are damaged.
dirt or stains.
1) PAAC panels. Apply the coating with a sponge-textured roller in accordance with the manufacturer’s
recommendations. Cover all exposed galvanized steel surfaces for protection from splattering. Apply
the coating at a minimum thickness of 60 dry mils (1.5 mm). Apply the coating only when the ambient
temperature is greater than 40 o F (4 o C) and rising. Do not apply any coating during rainfall or when
rainfall is forecast overnight.
2) Galvanized Steel Supports. Apply a corrosion resistant coating by brush, roller, or airless spray in
accordance with the manufacturer’s recommendations. Protect the adjacent PAAC surfaces from
overspray. Apply the coating at a minimum thickness of 2 dry mils (0.05 mm). Use a color that
matches the PAAC final topcoat color. Apply the coating only when the ambient temperature and
relative humidity fall within the limits stated by the manufacturer.
Install in accordance with manufacturer’s recommendations and Plan details. Do not install walls with burns,
discolorations, cracks, or other objectionable marks that would adversely affect the performance of the
system. Ensure to install panels with the absorptive portion facing the highway side.
Install in accordance with manufacturer’s recommendations and Plan details. Do not install walls with burns,
discolorations, cracks, or other objectionable marks that would adversely affect the performance of the
system. Ensure to install panels with the reflective portion facing the highway side. 10281028102810281028
Before beginning earthwork on the Project, stake the noise barriers in the field and establish the final ground
line elevations at the noise barrier walls.
After wall stake out data has been reviewed and approved by the Engineer per subsection 624.1.03, furnish
these elevations to the supplier who will develop the shop plans per subsection 624.1.03.A.
them without the Engineer’s approval.
Ensure that vibration from metal barriers is not a secondary source of noise transmission.
recommendations and as directed by the Engineer at the Contractor’s expense.
conditions:
1) Submit load calculations for the specific connection to be modified.
2) Use a safety factor of at least 3.0.
backfill.
If the Engineer believes the trench is too narrow for compaction, backfill the trench excavation with
concrete grout to the Engineer’s satisfaction. No additional compensation will be made for the concrete
grout.
long as the Engineer deems practical.
and plant grass or sod.
1) Vertical alignment for barriers and posts is:
• 0.5 in. (15 mm) for noise barrier heights to 10 ft. (3 m)
• 1 in. (25 mm) for noise barrier heights to 20 ft. (6 m)
• 1.5 in. (40 mm) for noise barrier heights to 30 ft. (9 m)
2) Horizontal alignment for noise barriers is close to that shown on roadway Plans.
3) Post spacings are within 0.5 in (15 mm) of their intended location.
to 95% of the maximum density as determined by GDT 7, GDT 24a, GDT 24b or GDT 67, as applicable.
Determine in-place density according to GDT 20, GDT 21, or GDT 59, as applicable.
1) Manufacture Type C and G panels within the dimensional tolerances for Flat Wall Panels listed in
SOP-3, Standard Operating procedures for Precast/Prestressed Concrete.
2) The Department may reject noise wall panels based on excessive deviations.
3) For textured finished, surface defects greater than 5/16 in. (8 mm) in 5 ft. (1.5 m) will be rejected. 10291029102910291029
and Shop Drawings approved by the Engineer.
complete elevation view of each single and double steel door set indicating the locations and the
concrete pad top elevation.
This work includes providing graffiti-proof coating on both faces of concrete and masonry noise barriers, and
single and double steel doors from the ground line to the top of the wall.
intact.
Store the materials out of the weather, in a single location, and as specified by the manufacturer.
cause.
Use application equipment recommended or approved by the coating manufacturer for use on this Project.
Use equipment in good operating condition.
recommended by the coating manufacturer.
pressure spray.
624.3.02 Quality Acceptance
The panels are subject to rejection if they fail to meet the requirements specified above. The following defects are also
cause for rejection:
10301030103010301030
624.4Measurement
Clearing and grubbing will not be measured separately for payment.
Excavation, borrow, and embankment will not be measured for payment unless an earthwork pay item is included
in the contract.
The scope and dimensions of the work are as shown on the Plans.
Grassing is not measured separately for payment unless shown on the Plans as a payment item.
Vine, shrub, and tree planting shown on the Plans is measured according to Section 702.
Items shown on the Plans but not covered in this Specification are measured for payment according to the
applicable portions of the Specifications.
Concrete masonry wall constructed of concrete masonry units (blocks), complete in place, is measured in
square feet (meters) of area from end to end and from top of footing to top of wall, including solid top block or
solid cap block.
Steel wall is measured in square feet (meters) of wall surface installed before backfilling complete in place
according to Subsection 109.01, Measurement and Quantities. There will be no separate measurement for
posts, flashing, caps, concrete post embedment, or other incidental items required for construction.
Precast concrete noise barriers are measured in square feet (meters) of wall surface before backfilling,
including pile flanges, complete in place and accepted.
There will be no separate measurement pile, anchor bolts, plates, connections, neoprene bearing pads,
connecting bolts, or other components of the noise barrier.
Treated timber walls are measured in square feet (meters) of wall surface installed before backfilling.
No separate measurement is made for posts, caps, foundations, footings, hardware, timber treatment,
pile, or over boards.
Glass reinforced thermoset composite structural panel walls are measured in square feet (meters) of wall
surface installed before backfilling complete in place in accordance with Section 109.
There will be no separate measurement for posts, top caps, bottom caps, side caps, flashing, strip
seals, mounting brackets and hardware, concrete post embedment, or other incidental items required
for construction.
Precast Autoclaved Aerated Concrete walls are measured in square feet (meters) of wall surface installed
before backfilling, complete in place and accepted.
There will be no separate measurement for steel supports or any other components of the noise barrier. 10311031103110311031
Absorptive panel walls are measured in square feet (meters) of wall surface before backfilling complete
in place and accepted. There will be no separate measurement for steel post or any other components
of the noise barrier.
Reflective panel walls are measured in square feet (meters) of wall surface before backfilling complete in place
and accepted. There will be no separate measurement for steel post or any other components of the noise
barrier.
624.5Payment
The pay quantities will be the Wall Envelope quantities shown in the Plans unless the Engineer approves an adjusted
wall envelope. In this case, the pay quantities will be the adjusted wall envelope quantities.
No additional compensation will be made for any additional material, equipment, design, or other items found
necessary to comply with the project Specifications as a result of the Department's review except for changes made
necessary by the survey verification required by Subsection 624.1.03 and Subsection 624.3.01.F.9, or other changes
approved by the Engineer.
Include in the unit bid prices all costs necessary to comply with the requirements of this specification. No payment will
be made for wall area outside of the adjusted wall envelope.
The cost of clearing and grubbing is included in the Lump Sum Clearing and Grubbing Item for the Project. When
clearing and grubbing is not shown as a payment Item, the cost is included in the overall Contract Price for the
work covered in this Specification.
No separate payment will be made for Excavation, Borrow and Embankment unless shown on the Plans as a
separate Pay Item.
No separate payment will be made for Grassing unless shown on the Plans as a separate pay item.
When the Plans state that this Item will be paid for, payment will be made under Section 702.
Items shown on the Plans to be paid for but are not covered by this Specification will be paid for according to the
applicable portions of the Specifications.
includes but is not limited to: Concrete blocks of the thickness shown on the Plans for the wall and
pilasters.
Steel wall will be paid for at the Contract Unit Price bid per square foot (meter). Payment is full compensation
for furnishing and installing materials, providing post and post embedment, and providing labor, equipment,
and incidentals to complete the Work. 10321032103210321032
Precast concrete noise barrier will be paid for at the Contract Unit Price bid per square foot (meter). Payment
is full compensation for furnishing materials, including piling and attachments and for erecting the noise
barrier, including graffiti-proof coating.
Treated timber wall will be paid for at the Contract Unit Price bid per square foot (meter). Payment is full
compensation for furnishing materials including concrete and steel and for erecting the noise barrier.
Glass reinforced thermoset panel walls will be paid for at the Contract Unit Price bid per square foot (meter).
Payment is full compensation for furnishing and installing materials, including post and post embedment, and
for labor, equipment, and incidentals to complete the Work.
Precast autoclaved aerated concrete noise barrier will be paid for at the Contract Unit Price bid per square
foot (meter). Payment is full compensation for furnishing materials, including steel supports, and for erecting
the noise barrier, including graffiti-proof coating.
Absorptive wall will be paid for at the Contract Unit Price bid per square foot (meter). Payment is full
compensation for furnishing and installing materials, post and post embankment, labor, equipment, and
incidentals to complete the Work.
Reflective wall will be paid for at the Contract Unit Price bid per square foot (meter). Payment is full
compensation for furnishing and installing materials, post and post embankment, labor, equipment, and
incidentals to complete the Work.
Payment will be made under:
Item No. 624 Noise barrier type ___, Ground Mounted Per square foot (meter).
Item No. 624 Noise barrier type ___, Structure Mounted Per square foot (meter).
624.5.01 Adjustments
General Provisions 101 through 150.. 1033 1033 1033 1033 1033
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