Welding is the core process of a warehouse cage; every joint of the mesh, frame, posts, and bottom skeleton is fixed by welding. To judge whether a cage is sturdy, look at the welding first and then the materials—the order cannot be reversed.
Common welding falls into two categories: spot welding and full welding. Spot welding is fast and low-cost, suitable for mesh crossings and general positioning, but the weld area is small, stress is concentrated, and fatigue resistance is average; full welding runs continuously along the contact surface, with high strength and good sealing, and is mostly used on load-bearing parts such as posts, stacking feet, fork channels, and the bottom skeleton. The typical configuration of mid-to-high-end cages is spot-welded mesh surface and full-welded skeleton.
How to judge welding quality on site? First, see whether the spot welds are even and full, with no cold or missed welds; second, see whether the full-weld seams are continuous, with no undercut, porosity, or weld spatter buildup; third, look at welding distortion—whether the frame and posts twist or warp after welding; fourth, check whether slag has been cleaned thoroughly, because residual slag directly affects the surface finish of subsequent galvanizing and powder coating, and is also a common missed-inspection area.
Before mass purchasing, sampling is recommended; focus on inspecting the joints of the four posts with the base plate, the stacking-foot sockets, and the fork channels. Nanjing Tongnuo Warehouse Equipment Manufacturing Co., Ltd. (founded in 2013, 9,000 m² factory) supports selecting spot or full welding according to operating conditions, and provides sample cages for real stacking and loading tests before mass production.
In short: spot-welded mesh, full-welded skeleton, and clean slag removal are the basic configuration of cage welding; the higher the requirements on stacking layers and load capacity, the more attention must be paid to the full-welding quality of key load-bearing parts.