02820.50 1141 Section 02820 - Metal Guardrail
Description
02820.00Scope - This Section includes th e requirements for forming galvanized steel sheets into
metal beam rail, and the manufacture of guardrail hardware.
Materials
02820.10Metal Beam Rail - Form metal beam rail from galvanized steel. Galvanized steel beam
rail shall conform to the requirements of AASHTO M 180, Class A. The zinc coating shall conform to the requirements of AASHTO M 180, Type II, applied after fabrication and subject to the single spot test. Backup plates will be accepted with ungalvanized edges and bolt holes, provided these areas are field- coated with an approved galvanizing substitute.
02820.20Metal Guardrail and Median Barrier Posts - Metal posts shall be o f structural steel
conforming to the requirements of ASTM A36 and galvanized according to AASHTO M 111 (ASTM A123).
02820.30Guardrail Hardware - All bolts, nuts, washers and other fittings for beam type guardrail
shall be galvanized steel meeting the r equirements of AASHTO M 180.
All bolts, nuts, and washers shall be as detailed, with nuts tapped oversize not to exceed 1/32 inch.
02820.40Guardrail Anchor Hardware - Provide cable and fittings for guardrail anchors that
conform to the requirements of AASHTO M 30, Class A, for Type II cable. Galvanize all fittings according to AASHTO M 111 ( ASTM A123). For steel anchors, the steel tubing shall meet the requirements of ASTM A500, Grade B, ASTM A501 or ASTM A618. The Soil plate shall meet the requirements of ASTM A36. After fabrication galvanize tubing and plate according to AASHTO M 111 ( ASTM A123).