When sourcing bed fittings, prioritize material durability and load-bearing capacity. For heavy-duty applications, choose cold-rolled steel or reinforced zinc alloy with a thickness of at least 2.0mm. Ensure that moving parts, such as gas springs for storage beds, have a pressure rating (Newton) calibrated to the mattress weight and have passed 10,000+ cycle durability tests. For surface finishes, electroplating or powder coating should meet salt spray test standards (e.g., 48-72 hours) to prevent corrosion in humid environments.