A06_RPFO_BLM_generic_Cattleguard_drawing.pdf

This is a standard detail drawing specification for a steel cattle guard grid with and without cleanout, designed by the United States Department of the Interior, Bureau of Land Management. The document provides comprehensive engineering specifications and technical details for the manufacture and assembly of cattle guard grids used in land management applications.

The drawing specifies structural steel components including cold-formed rails, header plates, stringers, and welded assemblies with detailed dimensional tolerances and material requirements. Key specifications include 1/4-inch (6 mm) header plates, 3/16-inch (5 mm) structural elements, and 7-gauge minimum thickness cold-formed steel per ASTM A242 Grade B. The design incorporates both standard configurations with clearout panels and alternative designs for wild horses, as noted in Detail F. The grid features equally-spaced stringers as referenced in the specifications, with specific mounting requirements including 6 of 9/16-inch (14 mm) holes for anchor bolts. Welding symbols legend and detailed cross-sections (Details A through E) provide construction guidance for rail configurations, welds, and component assembly. The document was designed August 29, 1990, with revision showing a metric conversion update dated 7/31/09. The drawing is identified as Standard Detail Drawing No. 02879-1 and emphasizes safety considerations throughout the design specifications.