Long span shelving rack is one kind of the storage rack,which has a wonderful looks and scientific structures.The upright is made of the cold rolled steel sheet,which is bent and rolled.And it has the double line of holes,and there is a 50mm distance between two holes.The holes is designed to hang the beams.There are row bracing and diagonal racing between the upright frame.And the beam is "P" beam,and the height is matched with the shelf panels.