... 1)3 or more layers 2)Max 4T for beam,15T for upright 3)Material Steel Q235 4)corrosion resistant ... make sure of the safety;5), Rich accessories: upright protector, guide rail, frame barrier, row spacer, wire decks, steel shelf, etc ... 50P-Box Beam29572053166312581064913739611100*50400034612804212017941538Please inform us of the following information for quick quotation: 1.Drawing (if available)2.Size ...