A storage shelving module 10 preferably expandable in three dimensions so as to vary the size and capacity of the module without the need to supplement or replace component parts. The module 10 includes first and second frame sub-assemblies 24, 26, each of which includes four telescoping elements 18. Each telescoping element 18 defines horizontally 22 and vertically 20 extending leg members. Each of the horizontally extending legs defined by a telescoping element in each of the two sub-assemblies is disposed in a telescopic relationship with the vertically extending legs in the second sub-assembly. Locking mechanisms 36 are provided for securing each pair of legs disposed in a telescopic relationship together in a fixed disposition at selective locations whereby the collective length of each such pair of legs is adjustable to vary the size and capacity of the shelving module.
