Steel Galvanized, portable bleachers. Standard features include; a galvanized steel angle understructure with an 8" rise & a 24" run, a 54" wide front walkway elevated 32" above grade with stairs at each end, double 2x10 footboards, risers, 2x10 clear anodized seat planks, vertical aisle, and chainlink guardrail system. All Outdoor Aluminum Bleachers are designed in accordance with the IBC 2009, and ICC 300-2007 building codes.