Shelving
Steel shelving is a very inexpensive solution for pick & pack operations which have many SKUs that are relatively shallow in depth. Because the shelving structure is built using relatively high gauge steel, vertical expansion potential is very limited, so shelving is also typically the storage unit of choice for warehouses with low ceilings or mezzanines.
Steel shelving comes in two general varieties: boltless “rivet” shelving, which is assembled much like pallet rack without the use of nuts or bolts, is the less expensive variety due to its lighter-duty steel construction and the ease with which it is assembled and configured; and nut-&-bolt shelving which is of a heavier gauge and therefore more expensive and can be used to store significantly heavier products.