710Wood Materials

710.1-STRUCTURAL MATERIALS: Timber, lumber, piles, posts, and blocks shall meet the requirements of AASHTO M 168 and AASHTO M 133. Preservation and Treatment plants shall meet the requirements of the Book of Standards of the American Wood Protection Association (AWPA). All preservatives and treated wood products shall comply with US EPA regulations. 710.2-SPECIES AND GRADE: 710.2.1-Structural softwood shall meet the requirements of the Southern Pine Inspection Bureau (SPIB) grading rules. All wood for structural use shall be visually or m echanically graded for the requirements shown on the Plans or specified in the contract. 710.2.2-Structural hardwood shall meet the requirements of AASHTO M 168 or the Northeastern Lumber Manufacturers Association (NeLMA) structural grades. The grade a nd species required shall be as shown on the Plans or specified in the contract. 710.2.3-Hardwood used for bridge decking shall meet the Standards of the National Hardwood Lumber Association (NHLA) for sound square edge, be rough sawn and sized by being processed through a hit or miss surfacer. 710.2.4-All graded material may either carry the appropriate grade stamp, or be inspected by an independent inspection agency approved by the Division. 710.3-PRESERVATIVE TREATMENT: All wood products and preservative treatments used for highway and commercial use shall meet the requirements of AWPA Standard U1 and AASHTO M 133. The quantity of preservative shall be as required above, unless modified by the Plans or purchase order. 710.4-TREATMENT PLANTS: Material treated with preservative may be purchased from certified or noncertified plants. Both types of plants shall adhere to the quality control procedures of AWPA M2. 710.4.1-Certified Plants: The Division's procedure for plant certification is defined in MP 710.01.40. 710.4.2-Noncertified Plants: Material purchased from noncertified plants will be tested on a lot by lot basis. Th e inspection shall be performed by a Division approved inspection agency. The cost of the inspection will be paid by the supplier. Shipments from noncertified plants shall be documented as described in MP 710.01.40. 710.5-WOOD POSTS: Wood posts shall meet the requirements of AASHTO M 168, AASHTO M 133, and AWPA UC4B. 819 710.5.1-Rectangular posts for guardrail shall be No. 1 major or minor species of Southern Pine as defined in Section 400 of the SPIB grading rules. 710.5.2-Dimensions of all guardrail posts except as noted on the Plans shall be as follows: Rectangular Guardrail Posts Size: 6” ± ¼” X 8”± ¼” throughout the length except as noted on Plans Length: 6’ ± ½” 710.5.3-Dimensions of wood posts for fence and signs shall be as shown on the Plans. 710.6-PLYWOOD: 710.6.1-Plywood shall meet the requirements of Product Standard PS -1 of U.S. Department of Commerce. All plywood shall be identified with the mark of a qualified inspection and testing agency. The identification shall include: 710.6.1.1-Species group classification, o r class number, or span rating, depending on grade. 710.6.1.2-Either interior or exterior. 710.6.1.3-Grade name or grade of face and back veneers. 710.6.1.4-The symbol PS-1 signifying conformance with the standard. 710.6.2-Exterior plywood shall b e bonded with exterior glue and the veneers used in manufacture cannot be less than grade C as defined in PS-1. 710.7-COMMON LUMBER: Common lumber is untreated and suitable for general construction and utility purposes. Common lumber is from two ( 2) inches to, but not including, five ( 5) inches thick and is two (2) inches or more in width. Common lumber shall be grade 2 or better, unless otherwise specified in the plans, when graded by the Board of Review of the American Lumber Standards Committee. 710.8-SERVICE, LIGHTING, AND TYPE D TRAFFIC SIGNAL POLES: Wood Service or lighting poles shall be ANSI Class 5, or larger, or as called for on the contract plans. Lighting poles shall be southern yellow pine and service poles shall be either southern yellow pine or Douglas fir. Type D traffic signal poles shall be ANSI O5.1 Class 3 or greater, or as called for on the contract plans. Species shall be either southern yellow pine or Douglas fir. Poles shall not have more than 180 degree twist in grain over the full length and the s weep shall be no more than four

The poles shall be pressure-treated) to meet the requirements of American Wood Protection Association (AWPA) Standard U1 UC4C (Commodities Specification D: Poles). 820