720025 GUARDRAIL OVER CULVERTS, TYPE 2 -31 EACH

DE · 2025 Standard SpecificationsBook pages 401–402View official source ↗

GUARDRAIL SECTION 720 391 ITEM DESCRIPTION UNIT 720019 GALVANIZED STEEL POST, 8' EACH 720020 GUARDRAIL REFLECTOR EACH 720021 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 1 -31 LF 720022 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 2 -31 LF 720023 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 3 -31 LF 720025 GUARDRAIL OVER CULVERTS, TYPE 2 -31 EACH 720026 GUARDRAIL OVER CULVERTS, TYPE 3 -31 EACH 720028 CURVED GUARDRAIL SECTION LF 720030 RELOCATING GUARDRAIL LF 720032 REMOVE AND RESET GALVANIZED STEEL POST AND OFFSET BLOCK EACH 720033 OFFSET BLOCKS EACH 720034 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 1-27 LF 720035 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 2 -27 LF 720036 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 3 -27 LF 7200 37 GALVANIZED STEEL BEAM GUARDRAIL, TYPE 1 -31, STEEP SLOPE LF 720038 LONG WOOD BREAKAWAY POST, TREATED EACH GUARDRAIL END SECTIONS AND TRANSITIONS SECTION 721 392 SECTION 721 — GUARDRAIL END SECTIONS AND TRANSITIONS

721.1Description.

This work consists of guardrail end sections, end anchorages, buried end sections, guardrail to barrier connections, and guardrail transition sections.

721.2Materials.

A.Guard rail End Treatment.

1.Provide guardrail end treatment, selected from the Approved Products List

(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:

a.Type 1 – tangent end treatment.

b.Type 2 – flared end treatment.

c.Type 3 – median end treatment.

2.Provide with retroreflective material on the nose of the guardrail end treatment as follows:

a.Type 1

i.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.

b.Type 2

i.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.

c.Type 3

i.A marker consisting of ASTM D4956 Type IV retroreflective yellow sheeting covering the

nose of the end treatment.

d.Type 4 -27

i.A minimum of 3 -square feet.

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.

B.Guardrail End Anchorage. Section 720.2

C.Buried End Section. Section 720.2

D.Guardrail to Barrier Connection. Section 720.2

E.Non -Shrink Grout Section 1047.2

F.Bullnose E nd Treatment Section 720.2

G.Galvanized Steel Rub Rail Section 1070

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 401–402 of 779.

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