... . Storage Systems, selective pallet rack, shelving pallet racks,beam rack1), The most popular and economical racking in warehouse;2 ... hole distance 50mm or 75mm;3), Box beam or step beam used. Beam can be freely adjusted by pitch 50mm or ... 75mm;4), Connection of the upright and beam is by wedging, equipped with safety pin to make ... Systems, selective pallet rack, shelving pallet racks,beam rack