Montana Department of Transportation (MDT) · 2020 Standard Specifications for Road & Bridge Construction
Section 705 — Guardrail
Montana 2020 Standard Specifications for Road & Bridge Construction, Section 705. Full text, cross-references and related pay items on BuildSpec.
SECTION 705 GUARDRAIL 705.01 GUARDRAIL Furnish steel beam and cable guardrail materials in accordance with the contract. Manufacturers of steel beam guardrail must be listed on the QPL. 705.01.1 Steel Beams and Fittings Furnish steel beam guardrail in accordance with AASHTO M 180, Class A, Type 1 requirements. Supply rail in lengths that place the splices on posts. Shape rail to be erected on curve radii less than 150 feet (45.75 m) before erecting. Use ASTM A307 bolts with ASTM A563, Grade A or better nuts. Use ANSI B27.2, Type A plain steel washers. Galvanize all bolts, nuts, washers, and…
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