Selecting the correct material is the foundation of durability. For standard office furniture, Cold Rolled Steel with zinc plating is the industry standard. However, for kitchen or medical environments, you must specify SUS304 or SUS316 Stainless Steel to prevent corrosion. Regarding load capacity, always categorize your needs: Light-duty (up to 35kg) for desk drawers, Medium-duty (45kg-68kg) for file cabinets, and Heavy-duty (above 100kg) for industrial toolboxes or machinery. Ensure the supplier provides a SGS Load-Bearing Test Report to verify these claims.