This standard specifies the requirements for materials, dimensions, manufacturing process, and finishes for catches used on doors and windows. It serves as a quality and procurement guideline for architects, builders, and manufacturers to ensure proper fit, finish, and durability of builder's hardware.
Specifies requirements for metallic catches for general use on doors and windows.
Quick Reference Values
General tolerance on overall dimensions± 1.0 mm
Minimum thickness of mild steel sheet1.25 mm
Minimum anodic coating thickness for aluminum10 microns (Grade AC 10)
Practical Notes
Ensure the selected finish matches the environmental exposure. For instance, use brass or heavily anodized aluminum in coastal regions to prevent rapid corrosion.
Hardware alignment issues on site are often traced back to catches falling outside the standard dimensional tolerances. Check samples during material inwarding.