The Gliderol fire shutter system was tested in the USA by the Underwriter's Laboratories Inc. in accordance with BS 476 Pt 22 and UL 10B and achieved integrity of up to 4 hours. The GLIDEROL fire shutter system also meets the Australian Standard 1530 for fire rated shutters methods for fire test on building materials, (components and structures) Part 4-1990. Our fire shutters are available in both counterbalanced models.

Drum Assembly
The roller drum consists of an extremely rigid steel tube sheathed over a driver assembly at each end. The drive assembly is made up of steel discs fitted to a solid polished-steel shaft of AISI 1045 grade hardness. The shaft at the drive end is key-wayed to accept the drive sprocket.

The protruding ends of the shafts are fitted with self-aligning bearings. Their housing which are fitted through the 8mm thick steel headplates holds these bearings. The headplates form the support for the entire door roll.

Counterbalanced models shall have torsion springs incorporated into the roller drum. One end of the spring is secured to the shaft and the other secured to cast-iron drum wheels attached to the tube so that spring torsion is applied as the tube rotates around the shaft. The number, type and size of springs used are calculated, in accordance with the width, height and weight of each door to achieve the torque required for counterbalancing 80% of the door weight.

Door Curtain
Sturdily designed scrolled profile rollformed from 1.0mm or 1.2mm thick galvanised steel with steel endclips secured to alternate slats to prevent lateral movement. Door curtain is available in galvanised.

Bottomrail
Inverted T formed by 2 lengths of up to 65 x 65 x 6mm thick angle iron secured back-to-back through a bottom slat.

Operation
Manually operated models are equipped with chain-operated hoists.

Electric Operator
The operator is mounted at one side of the door, directly below the drive sprocket. Hence, the manual handchain is also located at the side of the door opening, readiliy accessible for use. The operator also features an automatic disengage mechanism which allows immediate manual operation whenever the chain is pulled. Whenever the chain is at rest, it automatically re-engages into automatic mode. The model is recommended for use where it is preferred to have manual operation conveniently available.

The operator is supplied with push button controls, upper and lower limit switched and thermal overload protection.

Automatic Descent Mechanism
All GLIDEROL fire shutters are equipped with a fusible-link activated automatic descent mechanism designed to automatically close the shutter whenever the surrounding temperature reaches 74 degrees Celsius. Fusible-links with break-point values other the 74 degrees Celsius and quartz bulb type are also available on request.

Where required, an additional auto-descent mechanism incorporating a solenoid switch can also be incorporated. this device is connected to a pair of 24V DC contacts supplied by the fire alarm panel so that the shutter will also automatically whenever the fire alarm is activated. In such cases, both mechanisms are capable of operating independent of each other. The shutter will close whenever either of them is activated.