Specifications include, but are not limited to: SIGN BLANK SPECIFICATIONS: All aluminum sheet sign blank material offered within this bid shall conform to ASTM B 209, Alloy 6061-T6 or Alloy 5052-H38. The minimum thickness of the sheet less than 36” in longest dimension shall be 0.080”. Signs 36” or greater in longest dimension shall be a minimum of 0.100” unless otherwise requested at time of order. SIGN PLANK SPECIFICATIONS: All sign plank material offered within this bid shall be extruded aluminum plank of butt type, conforming to the requirements of ASTM B 221, Alloy 6061-T6. Aluminum molding may be of T5 or T6 temper unless otherwise requested at time of order. ROUND ALUMINUM TUBE SPECIFICATIONS All round aluminum tube to be standard shape aluminum tubing conforming to ASTM B221. All round aluminum tube to be alloy 6063-T6, mill finish.