attachment_1_bid_214_25.pdf

This document appears to be a technical specification for materials related to delineator posts and sheeting, likely for a transportation infrastructure project, potentially for the Nebraska Department of Transportation (NHDOT). The specification details precise requirements for delineator posts, which shall be flanged channel section steel conforming to ASTM A 36 posts and galvanized according to AASHTO M 111, with specific weight, hole, and length specifications. The document outlines detailed material requirements for delineator sheet materials, including options for aluminum sheeting (ASTM B 209, Alloy 6061-T6 or 5052-H38) and steel sheeting (ASTM A 635, galvanized), with comprehensive technical performance requirements for temporary thermoplastic materials.

The specification provides extensive technical details on material properties, including tensile strength, impact strength, flexural strength, and modulus requirements, with specific test methods and minimum property standards. Additional requirements cover retroreflective sheeting (AASHTO M 268, Type IV) in various colors and bolt specifications for post mounting, including aluminum alloy hexagon head machine bolts with nylon washers and vandal-resistant nuts. The document includes a detailed table of minimum property requirements for thermoplastic materials and specifies hex nuts and bolts as 1/4" - 20x1-1/4" Hex Screw and Hex Nuts in Aluminum - Grade 2, indicating a comprehensive and precise set of technical standards for infrastructure delineation materials.