In many existing commercial buildings, door hardware was originally selected based on basic functionality and cost, rather than fire safety and long-term regulatory compliance. However, as building codes become stricter and fire safety awareness increases, upgrading door hardware from ordinary comme

The fire-rated door is used together with the frame, and it refers to a door that can meet the requirements of fire stability, integrity and thermal insulation within a certain period of time. The fire door is a protective measure to separate the building from fire. They are usually used in firewall