The shutter curtain consists of fully interlocking cold-rolled galvanised steel 20 gauge laths for maximum strength and durability. The laths are securely held in place by mild steel end locks to provide smooth trouble-free operation.
Vertical side guides, 75mm or 100mm x 32mm are formed from cold-rolled galvanised steel.
The shutter barrel is formed from steel tube.
Barrel assemblies are encased in 18 gauge galvanised steel sections.
6, 8 or 10mm steel plates support the shaft ends of the barrel to carry the motor.
A rigid ‘T’ section bottom rail is provided to give added strength.
Operation is either via a single phase or 3 phase, externally mounted motor fixed to one of the end plates. For normal operation a key switch is provided. In the event of a fire the brake is disengaged by the means of a fuseable link or a signal from the fire alarm. A range of control panels are available to facilitate this. The speed of the shutter descent is controlled by a centrifugal clutch/brake which is built into the motor unit.
Galvanised sheet laths are standard but they can be overcoated with a polyester powder finish. Guides, hoods and facias can be similarly overcoated.
Fire shutters are manufactured to specification s tested by Warrington Fire research consultants in accordance with BS476: Part 22, 1987 and BS5950: Part 8, 1990.
If you would like to know about Crown Doors & Shutters’s curtain walling please contact us today on 0191 4194499