... Boltless Shelving, Rivet Sack, Long Span Shelving 1,Dimension: 48"*18"*72" (W*D*H) 2,Black Wrinkle finished 3,New step beam Boltless shelving ... , rivet rack, long span shelving:1), Double-layer angle post, with concealed ... segments design2), Consist of angle posts, step beam, steel shelving or wooden panel, footplate and other accessory;3), Easy ...