This document provides an overview of the requirements of CSA-A344.2 – Standard for the design and construction of steel storage racks with respect to welding. It is designed to apply primarily to selective pallet racks, although the principles set out in this Guide may be used when purchasing and using other types of racks, such as deep reach, push-back, drive-in and drive-through racks; cantilever racks; portable racks; rack buildings; and stacker racks.