CattleGuardGrids_20160203183856_547_X.pdf

This is a technical engineering drawing showing specifications for a steel cattle guard grid with and without cleanout designs, issued by the U.S. Department of the Interior Bureau of Land Management. The drawing provides detailed structural specifications for manufacturing cattle guards, including dimensions, materials, and assembly requirements.

The drawing specifies the use of cold-formed structural steel tubing (ASTM A500, Grade B) and steel plate (ASTM A242) with minimum thickness requirements. Key components include header plates, stringers at equal spaces, rails, and anchor clips. The design includes specific measurements for all components, welding specifications, and modification options for wild horses. The drawing notes that the design loading must conform to AASHTO H-20-44 standards and includes both English and metric unit conversions. This appears to be Standard Detail Drawing No. 02879-1, last updated on July 31, 2009, and was designed to provide manufacturers with exact specifications for producing cattle guards that meet Bureau of Land Management requirements.