75mm Steel Roller Shutter (LOW AND HIGH CYCLE)

The curtain is constructed from 75 x 0.8mm and 75 x 1.0mm interlocking slats in galvanised steel. Slat thickness depends on the opening width (see the manufacturer). Every second slat is fitted with nylon end clips to minimise lateral movement and to ensure smooth operation. Slats can be replaced individually if damaged.

If ventilation or viewing is a requirement, multi-hole perforations or slotting can be provided. Multi Holes provide continuous perforation of the slats with 2.41mm diameter holes at 3.66mm staggered centres, providing 27% ventilation per slat (which is slightly reduced by any powder coat finish).

Slotting can also be provided with a slot size of 115mm x 25mm, either in vertical rows or

brick pattern, and will provide 22% ventilation per slat. (which is slightly reduced by any

powder coat finish).

Any number of slats can be perforated or slotted to meet the required airflow. The standard curtain finish is galvanised steel, with the option of a powder-coated finish in the Dulux Duralloy or Interpon Contemporary powder coat ranges. Both ranges include suitable matches to the Colourbond colour range. Non-standard colours are available upon request and may attract additional charges.

The bottom rail is made either from extruded aluminium (which can incorporate a weather seal if required) or from a roll-formed galvanised steel angle, which can also be provided with a weather seal adaptor and rubber seal.

Chain operation (up to 25.0m²); Electric operation is by a 0.75kW (1 H.P.) single / 3 phase motor gearbox, with a reversing contactor and an up, down, stop standard controller.

Alternatively, for high cycle shutters exceeding 40 operations per day, electric operation by a direct drive motorisation incorporating a springless drum and brake motor. Includes a standard up, down and stop controller.

Motors include a hand-chain override mechanism for emergency use in the event of a power failure. Wiring and commissioning can be provided from a power supply (supplied by others).

A wide range of access control systems are available i.e. Key switches, remote controls, push buttons. Card Readers and Fobs (by others) can also be integrated. Battery back ups and obstruction detection devices are also available upon request.

Sliding pad bolts (inside or outside) – padlock by others. Suitable for manual shutters only. Chain-operated shutters are locked with a wall-mounted chain lock keeper and padlock, or can be specified with shoot bolts to the bottom rail. Manual locking is not recommended for motorised shutters and is not covered under warranty due to the risk of motor burnout. (unless a safety switch is fitted).

The drum is manufactured from mild steel or galvanised steel tube and fitted with end caps. Engineered Helical coil oil-tempered springs are fitted to an axle inside the drum tube. They are designed to counterbalance the curtain weight when tensioned.

Whilst standard side guides comprise 75mm x 37mm roll-formed steel channel, other

options include 60mm x 37mm, 100mm x 37mm. An optional 100 x 37mm wind-locked guide is also available for additional wind loading and or security.

Integrity Door Services provides two laser-cut mild-steel drum-mounting brackets for each shutter. Brackets are supplied in zinc prime-coated or can be hot-dipped galvanised for

certain applications upon request. The door opening must be suitably prepared/designed by others to accommodate the above-mentioned mounting brackets.

Power supply: 

• 1 phase 240V 
• 3 phase 415V 
• 10A within 1 metre of the motor

Work by others: 

• power supply
• structural support
• adequate headroom and side room

Integrity Door Services reserves the right to change specifications at any time without notice.

12 months. Integrity Door Services reserves the right to change specifications at any time without notice.