Specifications include, but are not limited to: Construction Builder will construct a steel frame pre-engineered metal building at Fort Griffin State Historic Site. Builder will follow all specifications for the building outlined in this document. Builder will retain all building manufacturer specifications and ratings. Builder will assemble the building the using materials and methods designed by the manufacturer. Foundation Foundation will be constructed for a 30-foot x 60-foot pre-engineered metal building with a 25-foot attached shed, specifications noted below Foundation will meet all applicable building codes for Shackelford County, Texas. Foundation will meet foundation specifications by the building manufacturer. Foundation will be constructed of a reinforced concrete slab and beams under the entire 30 x 60-foot main area, of concrete with a minimum 5-sack mix and 3500 psi compressive strength. Slab will be a minimum of 4 inches thick. Slab will contain number 4, grade 60 rebar spaced a minimum of 16 inches on center, running the full length and width of the slab, and spaced evenly between the upper and lower surface. Beams under the slab will be a minimum of 12 inches wide and 16 inches deep. Beams will be spaced no more than 15 feet on center throughout, and installed at all slab edges.