Technical Information

Push-up operation is also known as self coiling or hand operation. The weight of the curtain is counter balanced by the self coiling action of the spring loaded barrel. The door is lifted open by using handles fitted to the bottom rail or T-Section.

This type of operation is suitable for relatively small openings, not exceeding 7.5m² or approximately 3000mm wide x 2500mm high.

Table : Space Requirements (refer to diagram)

Push up operation

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Note: these space requirements are applicable to all widths within the total m² limitations.

Chain operation is suitable for roller shutters between 8m² and 30m². These are operated mechanically by an endless chain through a spur reduction gear fitted to the spring loaded barrel.

Table : Space Requirements (refer to diagram)

Chain operation

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Note: these space requirements are applicable to all widths within the total m² limitations.

A manually operated reduction gearbox can be installed in place of the endless chain. A bevel gear type cast iron gearbox operated by a crank handle is used on most applications. Larger roller shutter doors may require proprietary worm reduction gearboxes. Generally, the cast iron type of gearbox is applied to doors not exceeding 25m² in area. Crank operation can also be specified instead of chain or push-up operation should the user so prefer.

Table : Space Requirements (refer to diagram)

Crank operation

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Note: these space requirements are applicable to all widths within the total m² limitations.

Electric operation is recommended for large doors in frequent operation, although it can be specified for any size door. Supply includes the electrical motor reduction gearbox, remote push button starter, limit switch assembly and, if required, an electro-magnetic brake. The unit is fitted with an emergency hand operator for use in the event of a power failure. Many additional features can be supplied, for example card readers, inductive loop circuits and automation.

Table : Space Requirements (refer to diagram)

Electrical operation

Click to enlarge

Note: these space requirements are applicable to all widths within the total m² limitations.