Specification: 2700x1000x4500(LxWxH) Height can be adjustable (Vertical column: 2pcs per column net weight: 46.8kg) (1)Composite crossbeam specification (mm): 50x80x1.5 Length (mm): 2700 Loading of each layer: within 800kg Net weight: 13.5kg (2)Composite crossbeam specification (mm): 50x100x1.5 Length (mm): 2700 Loading of each layer: within 1000kg Net weight: 14.8kg (3)Composite crossbeam specification (mm): 50x120x1.5 Length (mm): 2700 Loading of each layer: within 2000kg Net weight: 16kg (4)Composite crossbeam specification (mm): 50x140x1.5 Length (mm): 2700 Loading of each layer: within 2500kg Net weight: 17.6kg (5)Composite crossbeam specification (mm): 50x140x2.0 Length (mm): 2700 Loading of each layer: within 3000kg Net weight: 22.85kg