SECTION 509 – BRIDGE COMBINATION RAILING, MISCELLANEOUS RAILINGS, AND FENCE
509.01 Description
This Section describes the requirements for constructing metal railing, fence, and guide rail on bridges. Metal railing includes metal railing components for combination traffic railing system, combination non -traffic railing system, non-traffic pedestrian or bicycle railing, ornamental railing and other railing not subject to vehicular impact.
509.02 Materials
Bearing Pads ................................ ................................ ................................ ................................ ................. 907.03 Bolts and Bolting Material ................................ ................................ ................................ ................................ 908 Anchor Bolts ................................ ................................ ................................ ................................ ............ 908.01.03 Adhesive Anchor Bolts ................................ ................................ ................................ ............................ 908.01.04 Chain-Link Fence ................................ ................................ ................................ ................................ .... 913.02.01 Bridge Railing................................ ................................ ................................ ................................ ............... 913.03 Ensure that the railing is fabricated to allow for minor adjustments in both horizontal and vertical directions.
509.03 Construction
509.03.01 Bridge Railing
At least 30 days before beginning the work, submit working drawings for certification. Indicate material specifications for adhesive, anchors, washers, and nuts on the working drawings. Base the design embedment of the adhesive anchor bolts on a concrete compressive strength of 4 ,000 pounds per square inch. Ensure that the embedment depth of the adhesive anchors shown on the working drawings is sufficient to obtain the required pullout strength as required for the proof load testing as specified in 908.01.04. Ensure that the railing is fabricated to allow for minor adjustments in both horizontal and vertical directions. Install 1 or 2 rail aluminum or steel railing on top of the concrete parapet as shown on the Plans. Install other types of metal railing on concrete sidewalk or deck as shown on the Plans. Do not use expansion type anchor bolts.
1.Cast-in-Place Type. Set anchor bolts before placing concrete using a rigid template for each anchor assembly. When placing concrete, ensure that bolts do not move and spacing is maintained between the rigid templates. Ensure that the exposed threaded ends of the anchor bolts remain clean and protected from concrete. Clean the anchor bolts before installing the specified hardware.
2.Adhesive Type. Do not drill for installation until the concrete has cured for at least 14 days. Install adhesive anchors according to the manufacturer’s recommendations. When drilling, ensure that spalling does not occur and existing utilities are not damaged. Repair damage to the existing concrete, utilities, and reinforcement steel as a result of drilling. Clean and dry drill holes before and during installation of the adhesive anchors. Repair damage to galvanized coating as specified in 912.02.01.
509.03.02 Chain-Link Fence for Bridge
At least 30 days before beginning the work, submit working drawings for certification. Indic ate material specifications for adhesive, anchors, washers, and nuts on the working drawings. Base the design embedment of the adhesive anchor bolts on a concrete compressive strength of 4 ,000 pounds per square inch. Ensure that the embedment depth of the adhesive anchors shown on the working drawings is sufficient to obtain the required pullout strength as required for the proof load testing as specified in 908.01.04. Do not use expansion type anchor bolts. Place anchors using one of the following:
1.Cast-in-Place Type. Set anchor bolts before placing concrete using a rigid template for each anchor assembly. When placing concrete, ensure that bolts do not move and spacing is maintained betwee n the rigid templates.
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 290–290 of 651. View official source ↗