1103. 09(a) 1103.11( e) 1103 - 9 Initial Edition Grade and grade mark each post, before treatment, with an official grade stamp or inspection agency mark, certified by the Board of Review, American Lumber Standards Committee. Cut and drill before preservative treatment.
2.Treatment. Treat with Ammoniacal Copper Arsenite (ACA) or Chromated Copper Arsenate (CCA) Type A, B, or C meeting AWPA Standard P5. Use a minimum preservative retention of 0.40 pound per cubic foot by assay (oxide basis). Treat and quality mark according to AWPA C2. Inspect according to AWPA Standards M1 and M2. Include a treatment certificate with each shipment.
b.Composite Posts (for Post Mounted Signs, Type E).
1.Posts. Unsaturated polyester resin reinforced with E -glass and lightweight aggregate concrete not greater than 110 pounds per cubic foot to form a rigid structural support member. Tensile modulus of tube to be not less than 2,500 kips per square inch. Posts to be equal to or greater in strength to Schedule 40 steel of the same diameter according to ASTM A53 .
2.Weathering. Post must have less than 10% loss of strength after 3,600 hours of accelerated weathering exposure to moisture and lamps according to ASTM G 152, G55, and G154.
3.Color. Specified post color will be permanent throughout the FRP tube with not less than 1.5 mil dry film thickness. After 3,600 hours exposure according to ASTM G152, G 155, and G154, posts will exhibit 90% adhesion, ASTM D 4541 and a maximum color change of 25, Delta - E.
1103.10 DELINEATOR POSTS —Not used
1103.11 Miscellaneous Materials—
a.Hex Head Bolts , Nuts , and Washers for Extruded Panel Sign Post- Clips. Galvanized steel as specified in Section 1105.02(s) :
1.Hex Head Bolts. ASTM A307, Grade A or B.
2.Nut. ASTM A563 DH or ASTM A194 Grade 1 or 2.
3.Washer. Carbon steel helical coil or ASTM F436 or ASTM F844 (Note 1) . Note 1: If either ASTM F436 or ASTM F844 flat washers are used, bolt must be fastened either using two nuts or a single nut with the threads galled adjacent to the nut to prevent loosening.
b.Post- Clips. For extruded panel signs, aluminum, according to ASTM B108, Alloy 356- T6. For flat sheet aluminum signs with stiffeners, stainless steel, Type 304, 14 gage.
c.Auxiliary Supports for Exit Panels. Aluminum according to ASTM B211 , Alloy 6061- T6. 3 inches by 3 inches by 3/16- inch angle, 6 1/2 feet long or long enough to attach to three stiffeners on the main sign.
d.Lag Screws. 5/16-inch round head, galvanized steel as specified in Section 1105.02(s) , and according to ASTM A307.
e.Rivets. Aluminum, self -plugging or hollow -core, as follows: • 3/16- inch for mounting reflective units and distance plaques . Alloy 5056 with 7178 mandrels. • 3/16- inch for mounting flat alumi
Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 1256–1260 of 1,522.