Fire Rated Roller Shutters
The NASSAU TM (Tube Motor) and FF (Face Fixed) Fire Rated Roller Shutters are designed and manufactured at our Cheshire based factory from scratch using the latest steel cold rolling techniques. Each piece of steel goes though the cold rolling machine process where it is formed into a 75mm by 20swg Lath which is then assembled on site to produce the bespoke Fire Rated Roller Shutter.
Using this technique the shutters hold a fire test rating of 1, 2 or 4hrs from the Loss Prevention Council who have tested the resistance to fire of the product at their fire research station in Borehamwood, Hertfordshire. Each door holds this vital certificate and is one of the reasons NASSAU Fire Rated Roller Shutters continues to lead the way in Fire Prevention Door Solutions.
The shutter curtain is constructed from cold rolled galvanised steel laths, (76 mm), with a minimum thickness of 20swg. Each lath is retained by pressed steel or malleable iron endlocks fixed and secured by steel rivets. Cast iron wind locks are fitted to retain the shutter curtain within the guide channels in a fire situation.
Formed from mild steel flat bar & angle depending on door width, bolted back to back through a centrally located galvanised steel flat quirk.
Side Guides and Angles
A purpose cold rolled mild steel section of depths ranging from 65 mm to 100 mm dependent upon the application. Mild steel angles of suitable size and thickness are supplied to support the side guides and to form a secure fixing to the structure.
NASSAU FF – Self-coiling shutters are manually operated i.e. push-up/pull-down. The roller barrel is manufactured from 102mm 9swg tube and contains suitable sized springs to counter-balance the shutter. In a fire situation, a solder fusible link melts at 72°C, releasing the shutter via a drop-bar and a ratchet and pawl mechanism.
NASSAU FF – Hand chain operated shutters are fitted with a gearbox unit complete with low level hand chain to open the shutter and a brake release cord, to close the shutter. The roller barrel is manufactured from mild steel tube of suitable outside diameter and wall thickness to suit the shutter application, and is unsprung. The gearbox contains a controlled descent mechanism. A fusible link backup facility is provided as standard. A solenoid release mechanism is available which provides a manual test and reset facility, and can be connected to a fire alarm system (by others).
NASSAU FF – Electrically operated shutters are fitted with a motor/gearbox unit complete with a push button station with “UP”, “DOWN” and “STOP” buttons. The roller barrel is manufactured from mild steel tube of suitable outside diameter and wall thickness to suit the shutter application, and is unsprung. The gearbox contains a controlled descent mechanism and a brake release cord to close the shutter in the event of a power failure. A solenoid release mechanism is available which provides a manual test and automatic reset facility, and can be connected to a fire alarm system (by others).
NASSAU TM 1 Hr – Loss Prevention Certification Board Reference No. 165a/03. Test Report No. 208422 – BS 476 Part 22 1987.
NASSAU FF 1 Hr – Loss Prevention Certification Board Reference No. 165a/04. Assessment Report No. CC93051a – BS 476 Part 22 1987.
NASSAU FF 2 and 4 Hr – Loss Prevention Certification Board Reference No. 165a/01 (4 hour) and No. 165a/02 (2 hour). Test Report No. TE 83228 – BS 476 Part 22 1987.