Automatic door closure is initiated by one of three fusible links that melts at 165º Fahrenheit.
Incorporates corrosion-resistant components to assure a smooth, controlled descent. Protected by a steel head plate cover (cover not shown). Not available on UI model.
A torsion-spring-operated system, enclosed in a structural steel barrel, effectively counterbalances the door for a minimum of 10,000 cycles.
All Fire Coil door curtains are constructed with heavy-duty steel slats. See below for a complete list of slat styles.
Curtain bottoms are reinforced with a minimum of two steel angles for maximum durability. A bottom astral is included on all motor-operated doors.
Guides and end locks:
Structural steel angle guides provide added support for curtain slats. Zinc-plated, malleable cast-iron end locks prevent lateral movement of the curtain slats.
For maximum structural rigidity, curtain hoods feature rolled edges and are formed from 24-gauge, hot-dipped galvanized steel.