Specifications include, but are not limited to: 1. MATERIAL. a. Posts shall be made of rerolled rail steel or a new billet steel meeting the mechanical requirements of ASTM A 499, Grade 60 [420]. For rails weighing at least 91 lbs. per yd. of length, use steel meeting the chemical requirements of ASTM A 1. 2. LENGTH. a. Posts lengths will be indicated in plans or special provisions. A variation of more than ½ inch under the specified length will not be permitted. 3. WEIGHT. a. Posts shall be of the following nominal weights per length, as shown on the plans or in the special provisions: i. 1.12 lbs. per ft. ii. 2 lbs. per ft. iii. 2½ lbs. per ft. iv. 3 lbs. per ft. v. 4 lbs. per ft. b. Verify the nominal weights of the posts before punching and without galvanizing, or the addition of anchor plates or other attachments. The use posts weighing up to 5 percent under the weight shown on the plans or the special provisions. 4. SHAPE AND DIMENSIONS. a. Posts shall be of channel section design with flanges for the placement of the signs. Use flanges with a flat front face and positioned in the same plane to provide a smooth, uniform bearing for the sign. The back of the flanges and the posts shall be flat and parallel to the front. Connect the backs of the flanges and the posts flat and parallel to the front. Make the cross section of the posts symmetrical about the central axis, perpendicular to the front and back.