Section 1738
17-33 installing new decals and furnishing or relocating signs. This item of work may also involve
re-programming the radio. Payment for new risers will be covered separately. Payment will be made under: Pay Item Pay Unit Modify Radio Installation Each SECTION 1738 BACK PULL FIBER -OPTIC CABLE 1738 -1 DESCRIPTION Back pull and store or back pull and reinstall existing communications cable . 1738 -2 CONSTRUCTION METHODS During project construction where instructed to back pull existing aerial sections of fiber -optic communications cable, de- lash the cable from the messeng er cable and back pull the cable to a point where it can be stored or re -routed as shown on the plans. If instructed, remove and discard the existing messenger cable and pole mounting hardware once the cable is safely out of harm’s way . During project construction where instructed to back pull existing underground sections of fiber -optic communications cable, back pull the cable to a point where it can be stored or re - routed as shown on the plans. If instructed, remove abandoned junction boxes and backfil l with a suitable material to match the existing grade. Leave abandoned conduits in place unless otherwise noted. Where instructed, re- pull the fiber -optic cable back along messenger cable or through conduit systems. 1738 -3 MEASUR EMENT AND PAYMENT Back Pull Fiber -Optic Cable will be paid for as the actual linear feet of fiber -optic cable back pulled and either stored or back pulled and rerouted. Payment is for the actual linear feet of cable back pulled and accepted . No payment will be made for removing messenger cable and pole mounting hardware or removing junction boxes and back filling to match the surrounding grade as these items of work will be considered incidental to back pulling the fiber -optic cable. Payment will be made under: Pay Item Pay Unit Back Pull Fiber -Optic Cable Linear Feet 1743 -1 DESCRIPTION Furnish and install the size and type of support assembly for vehicular or pedestrian signal heads, pedestrian pushbuttons, Intelligent Transportation System technologies or other traffic control devices as shown in the plans. Furnish assembly with foundation, grounding system and all necessary hardware as shown in the Roadway Standard Drawings . Provide a pedestal assembly that meets AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals , and the Interim Specifications as shown on the plans . Unl ess otherwise required by the plans, install signal pedestals and pedestrian pushbutton posts on FHWA - approved breakaway support or anchor systems.
17-34 Furnish and install screw -in helical foundation as an alternative to the standard reinforced concrete
founda tion for supporting Type I and Type II Pedestals. Do not use for Type III Pedestals. 1743 -2 MATERIAL Refer to Division 10. Item Section Grounding Electrodes 1091 -6 Signal Pedestals 1098 -15 Wire 1091 -2 Furnish m aterial , equipment and hardware under this section that is pre-approved on the ITS and Signals QPL available on the Department’s website. Pedestals are defined as follows:
A.Type I - Pedestrian Pushbutton Post
B.Type II - Norma l-Duty Pedestal
C.Type III - Heavy -Duty Pedestal 1743 -3 CONSTRUCTION METHODS
A.Type I Pedestrian Pushbutton Post Install pushbutton post for mounting pedestrian pushbutton or an accessible pedestrian signal (APS) assembly (refer to Section 1705). Install underground conduit for pushbutton lead-in cable in the pushbutton post’s foundation. Attach or anchor pushbutton post to the top of foundation via a breakaway support in a vertical plumb orientation. Ensure post is of sufficient length to accommodate the pushbutton, accessible pedestrian signals and any associated pedestrian informational signing at the mounting heights shown in the plans.
B.Type II and III Pedestal s Locate foundations, determine elevation and submit findings for normal -duty and heavy -duty pedestals . Obtain the Engineer’s approval of foundation locations and elevations before constructing foundations. Excavate in accordance with Sectio n 410. If encountered, remove rock or boulders to a sufficient depth to obtain stability necessary to support the structure for design loads. Ensure ground is level before installing foundations. Construct foundations in accordance with Section 825. Cas t concrete for pole foundations against undisturbed soil unless otherwise permitted. Provide forms with chamfer strips that measure one inch along diagonal face at all corners above ground level. Do not install foundations over uncompacted fill or muck. Install conduit in foundations. Securely place, position and align anchor bolts symmetrically about the center of foundation. Give exposed vertical concrete surfaces a broom finish. Give exposed horizontal surfaces a float finish. Level tops of concrete f oundations. Do not allow tops to exceed 4 inches above adjacent ground surface. Pour and finish foundation to a level that is flush with the surrounding sidewalk when possible.
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 831–832 of 857.