Steel, carbon, fed qq-s-698, composition 1015 to 1020 commercial quality, enamel olive drab finish, 1/2 in. Thk material, 24 in. O/a w, 34-1/8 in. O/a lg, furnished w/four welded angle brackets spaced 6 in. C to c on lg and four welded cleats spaced 8 in. C to c along w on opposite side