This standard specifies the classification, model, requirements, test methods, inspection rules and packaging, marking, transportation and storage of steel multi-functional door frame profiles. This standard applies to multi-functional door frame profiles produced using cold-rolled steel plates and steel strips as raw materials and using cold bending and rolling forming processes.
JG/T 152-2003 history
2003JG/T 152-2003 Profiles of steel multifunction external doorframe