The overlap between the fire door and the door frame shall not be less than 10mm, and the gap between the door and the door frame shall not be greater than 4mm. After the fire door is installed and closed, the gap should not be too large, otherwise the sealing performance of the fire door is difficult to guarantee, and it is difficult to reflect its function of suppressing the spread of fire and smoke under fire conditions.

27 inch fire door,fire resistant door manufacturers in mumbai,overhead fire door,metal security door,fire door from garage to house,

fire resistant door manufacturer,fire resistant doors for home,fire resistant door,27 inch fire door,fire resistant door standards,fire resistant door,overhead fire door,fire resistant door locks,fire door from garage to house,

fire resistant,door paint,27 inch fire door,fire resistant door malaysia,metal door