1200mm - Heavy Duty Industrial Longspan Shelving Extension Bay consisting of 1 frame and 3 shelves. Heavy duty industrial boltless racking storage solutions (holds up to 850KG UDL). Can span ground stored loads so no bottom shelf is required.if not needed. Comes complete with chipboard supports as standard on 1400mm -2700mm lengths So easy to construct, no nuts & bolts, slots together in minutes Please note: all sizes are internal, 50mm needs to be added for each end frame. Why not ask about our installation service. Sizes shown as depth x height x length.