| 摘要 |
PURPOSE: A fire door for cutting off flame spread is provided to secure evacuation time by preventing flames from spreading through the gap between the fire door and a doorframe. CONSTITUTION: A fire door for cutting off flame spread is comprised as follows. Partition protrusions(120), formed by bending an inner plate(100), are formed on the inner surface of a doorframe(130). An outer plate(110) is bent and is coupled to the inner plate to support the partition protrusions. Seating grooves are formed on the outer plate to receive the partition protrusions therein. |
