721.1Description.
This work consists of guardrail end sections, end anchorages, buried end sections, guardrail to barrier connections, and guardrail transition sections.
721.2Materials.
(https://www.deldot.gov/Business). Before installation, provide a submittal for guardrail end treatment including the associated manufacture’s installation instruction for the end treatment selected. Use guardrail end treatment designs as follows:
retroreflective yellow stripes sloping downward at an angle of 45-degrees toward the side of the end treatment on which traffic will pass.
retroreflective yellow stripes sloping downward at an angle of 45-degrees toward the side of the end treatment on which traffic will pass.
nose of the end treatment.
ii. A striped marker consisting of ASTM D4956 Type IV sheeting with alternating black and retroreflective yellow stripes sloping downward at an angle of 45-degrees toward the side of the end treatment on which traffic will pass.
721.3Construction.
installing guardrail systems.
including the associated manufacturer’s installation instructions.
contract. 721.3.1 Post Installation.
approved by the engineer.
backfill around the posts. Backfill with approved material. Place backfill in compaction lifts not exceeding 6-inches of uncompacted material.
plumb. Repair bituminous concrete that cracks or breaks resulting from post installations in accordance with Section 401. 721.3.2 Guardrail End Treatment. Assemble and place the guardrail end treatment in accordance with the manufacturer’s recommendations. Grade in accordance with the manufacturer’s recommendations. Place only guardrail reflectors on the end treatment specified by the manufacturer. Affix the required retroreflective material to the nose of the guardrail end treatment. Construct guardrail end treatment using applicable construction methods provided in Section 720.3. 721.3.3 Guardrail End Anchorage. Install guardrail end anchorages in accordance with the Standard Construction Details. Construct end anchorages using applicable construction methods provided in Section 720.3. 721.3.4 Buried in Back Slope and Entrance Special End Anchorage. Install buried end sections in accordance with the Standard Construction Details. Construct buried end sections using applicable construction methods provided in Section 720.3. 721.3.5 Guardrail to Barrier Connection. Install approach type or exit type guardrail-to-barrier connections in accordance with the Standard Construction Details. Construct guardrail-to-barrier connections using applicable construction methods provided in Section 720.3. Fill existing holes in concrete barrier with non-shrink grout.
721.4Method of Measurement.
721.4.1 Guardrail End Treatments.
The Department will measure the quantity of guardrail end treatments as the number provided, assembled, placed, and accepted. The Department will define the limit of payment in the Standard Construction Details for the type of end treatment installed. 721.4.2 Guardrail End Anchorages, Entrance Special End Anchorages, Buried in Back Slope, Guardrail to Barrier Connection. The Department will measure the quantities of guardrail end anchorages, entrance special end anchorages, buried in back slope, and guardrail to barrier connections as the number provided, assembled, placed, and accepted.
721.5Basis of Payment.
721.5.1 Guardrail End Treatment.
and payment will constitute full compensation for:
instructions;
721.5.2 Guardrail End Anchorage.
each. Price and payment will constitute full compensation for:
721.5.3 Buried in Back Slope and Entrance Special End Anchorage.
at the contract unit price per each. Price and payment will constitute full compensation for:
721.5.4 Guardrail to Barrier Connection.
per each. Price and payment will constitute full compensation for:
ITEM DESCRIPTION UNIT 721000 GUARDRAIL END TREATMENT, TYPE 1-31, TEST LEVEL 2 EA 721001 GUARDRAIL END TREATMENT, TYPE 1-31, TEST LEVEL 3 EA 721002 GUARDRAIL END TREATMENT, TYPE 2-31, TEST LEVEL 2 EA 721003 GUARDRAIL END TREATMENT, TYPE 2-31, TEST LEVEL 3 EA 721004 GUARDRAIL END TREATMENT, TYPE 3-31 EA 721005 GUARDRAIL END TREATMENT, TYPE 4-27 EA 721006 END ANCHORAGE 31 EA 721007 ENTRANCE SPECIAL END ANCHORAGE EA 721008 BURIED IN BACK SLOPE EA 721009 GUARDRAIL TO BARRIER CONNECTION (EXIT TYPE 31) EA 721010 GUARDRAIL TO BARRIER CONNECTION, APPROACH TYPE 1-31 EA 721012 GUARDRAIL TO BARRIER CONNECTION, APPROACH TYPE 3-31 EA 721017 BULLNOSE END TREATMENT EA
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