Attachment_2-_DFO_Cattleguard_Drawings_and_Location_Map.pdf

This document consists of engineering drawings and specifications for cattle guard products manufactured for the United States Department of Interior, Bureau of Land Management (BLM), located in Montana.

The drawings include four main product designs: a location map showing the BLM facility near Dillon, Montana; a steel cattle guard grid with all-welded construction meeting ASTM A 36 specifications and AASHTO HS20 design load standards; cattle guard bases consisting of precast concrete with 3,000 psi compressive strength and lift eye sets for installation; and cattle guard wing details featuring all-welded steel construction. All steel components must be cleaned per SSPC SP4 standards and receive a prime coat and finish coat of lead-free alkyd metal primer and alkyd enamel paint in federal safety yellow or matching color number 13655. The specifications require a minimum paint thickness of 3 mils dry film applied in two applications. Cattle guard grids measure 12 to 16 feet in width with single widths of 12, 14, or 16 feet available. All welding must be secure and complete along edges and joints, conforming to AWS D1.1 standards. Manufacturers must submit two copies of descriptive data and written certifications confirming conformance to all stated requirements including materials and paint specifications. The drawings are designated as typical specifications for BLM Montana locations and are marked "NO SCALE ENTIRE DRAWING."