Specifications include, but are not limited to: The square steel sign post system for the shall conform to the latest version of the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD), and the State of Nebraska Supplement to the MUTCD including any updates and revisions. 2.1.1 The square steel post system shall be a Telespar brand or approved equivalent. 2.1.2 The Square posts shall be hot-rolled carbon sheet steel, structural quality, ASTM designation A570, Grade 50. 2.1.2.1 Average minimum yield strength after cold forming is 60,000 psi. 2.1.3 The system shall consist of a sign post, anchor and sleeve. 2.1.4 The cross section of the post shall be square tube when formed of 12 gauge (.105 U.S.S. gauge) or 14 gauge (.075 U.S.S. gauge), per request in line items, carefully rolled to size and shall be welded directly in the corner by high frequency resistance welding and externally scarfed to agree with corner radii. 2.1.5 The posts will be punched with 7/16 +/- 1/64 inches in diameter holes on 1” centers on all four sides down the entire length of the post. 2.1.5.1 On square tubing, holes shall be on the centerline of each side in true alignment and opposite each other directly and diagonally. 2.1.6 Post shall be manufactured from hot-dipped galvanized steel conforming to ASTM A653, G90, structural quality, grade 50, class 1. 2.1.6.1 The corner weld is zinc coated after scarfing operation. 2.1.6.2 The steel coated with chromate conversion coating and clear organic polymer topcoat. 2.1.6.3 Both interior and exterior of the post shall be galvanized. 2.1.7 The length of each post shall have a permissible length tolerance of +/- ¼”. 2.1.8 The permissible tolerance for straightness will be within 1/16” in 3 feet and standard corner radius shall be 5/32 of an inch +/- 1/64 inch. 2.1.9 The finished post shall be straight and have a smooth, uniform finish. 2.1.9.1 It shall be possible to telescope all consecutive sizes of square tubes freely and for not less than ten feet of their length without the necessity of matching any particular face to any other face. 2.1.9.2 All holes and ends shall be free of burrs and ends shall be cut square. 2.1.10 Permissible variation wall thickness tolerance is +.010”, -.005” Convexity and concavity measured in the center of the flat sides, tolerance in +/- .010”, determined at the corner. 2.1.11 Standard post lengths will be considered to be 10’, 12, and 24’ regardless of cross section size. 2.1.12 Standard cross sections size is considered to be 1-1/2”, 1-3/4”, 2”, and 2- 1/4” all square.