The door frame of the fire door can be fixed with the wall with expansion bolts, or the iron piece can be buried in the hole when the wall is built, and the connecting piece of the door frame can be welded firmly during installation. The door closer must be installed on the fire door, the sequencer should be installed when the door is opened, the handle on the door, the fire lock and other hardware should be complete.

ZHTdoors fire doors, 31 years of production experience in fire doors and Windows. The main UL fire doors, EN fire doors,  BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.