731.02 Timber Preservatives and Treatment
Table 730:5 Repair Coating Properties Property Test Value Slip Coefficient Report Value Only Salt Fog Resistance: Delamination None Rust Criteria @ 5,000 hours 8 mm Maximum Creep and 4 mm Average Creep Blister Criteria @ 4,000 hours Blister Conversion Value of 6 Cyclic Weathering Resistance: Delamination None Rust Criteria @ 5,000 hours 10 mm Maximum Creep and 5 mm Average Creep Blister Criteria @ 4,000 hours Blister Conversion Value of 7 Gloss Value Report Value Only % Gloss Retention Report Value Only Color Change, Δe Report Value Only Abrasion Resistance Weight Loss and Wear Index – Report Only Adhesion 350 psi [2.4 MPa] Freeze Thaw Stability 210 psi [1.4 MPa]
731.01 Materials
Provide timber preservative in accordance with AASHTO M 133.
731.02 Preparation for Trea Tment
A.General Requirements The Department’s “Shop Inspection” Testing Laboratory will inspect all lumber and timber products at the treatment facility. Ensure the treatment facility is equipped with the necessary gauges, appliances, and facilities, and make available to the Department 's representative. MATERIALS FOR GUARD RAIL, GUIDE POSTS, BRIDGE RAIL, MISCELLANEOUS RAILING, AND FENCES 732.01 747 B. Inspection Notify the Department’s “Shop Inspection” Testing Laboratory immediately before treatment of lumber, timber, piling, and posts. The Department's representative will inspect the following: Lumber, timber, piling, and posts for the grades and sizes required by the Contract; and Materials and processes used in the treatment in accordance with AWPA M2.
731.03 Storing and Handling
Store the lumber or timber on dunnage to prevent contact with the ground or paved surfaces, and allow to thoroughly dry after treatment. SECTION 732 MATERIALS FOR GUARD RAIL, GUIDE POSTS, BRIDGE RAIL, MISCELLANEOUS RAILING, AND FENCES
732.01 Metal Guard Rail
Provide guard rail items in accordance with the testing and performance requirements of NCHRP 350, and the following:
A.Beams Provide corrugated steel beams in accordance with AASHTO M 180, Type I or Type II.
B.Guard Rail Posts
1.Steel Posts Provide hot rolled (forged) steel shapes in accordance with ASTM A709, Grade 36. Provide shapes that are galvanized in accordance with AASHTO M 111. Complete punching, drilling, cutting, shearing, and grinding before galvanization. Repair surface defects by grinding, cutting, or welding. Ensure surfaces are coated with two coats of zinc -dust zinc -oxide prim er in accordance with Section 730, “Paint for Structural Steel.” Perform alternative repairs in accordance with ASTM A780/A780M. Alternatively, the Department will accept steel posts fabricated in accordance with ASTM A769/ A769 M. Ensure fabricated posts do not vary more than 5 percent from the mass, dimensions, and section properties for hot rolled shapes. Ensure dimensions, mass, and section properties are in accordance with the American Institute of Steel Construction (AISC) Steel Construction Manual , or the supplier’s technical publications endorsed by the AISC. Provide fabricated posts with sharp, sheared edges that are dulled in the upper 18 in [450 mm] of the post, using grinding, secondary rolling, or sand or shot -blasti ng. Complete dulling operations in accordance with AASHTO M 111 before galvanization.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 760–760 of 935.