Roller Shutter Doors are widely used in the building industry from simple applications such as serving hatches and shop fronts to heavy-duty electrical operated doors.
Roller Shutter Doors consist of steel interlocking slats, which form a continuous hinged curtain. This construction allows the curtain to roll up or down as it is raised or lowered onto a revolving spring-loaded barrel, which is mounted onto steel support end plate brackets. A bottom T-bar is fitted to the curtain to strengthen the curtain and allows for the fitment of handles and locking devices. The curtain is also prevented from moving side-ways by side channels or guides. The entire assembly is either bolted or welded to the structure and the rolling mechanism is enclosed in a canopy.
This is the integral part of any Roller Shutter and is available in different styles, material thickness, designs and finishes.
Guides are formed from a steel channel section and are mounted on either side of the door opening forming a guide channel for the curtain to run in. Guides are generally made of mild steel and are available in different depths according to the requirements of the various sizes of Roller Shutter Doors.
T-BAR (BOTTOM RAIL)
The bottom of the curtain is reinforced with a double steel 40x40x5mm thick angle to form an inverted T-section, which interlocks into the curtain. ALUMINIUM T-BARS is available, which offers better finishing, stability, and increase load – bearing abilities.
Nylon end locks are fitted on every alternate slat on either side of the Roller Shutter Curtain. The purposes of these are as follows:
Side plates are fabricated steel brackets, tailored to be fixed to either brickwork, concrete or steel columns, support the spring balanced shaft at each end. Side plates also provide the fixing points to support the canopy cover.
Consists of structural steel pipe of sufficient diameter and thickness to carry the load of the curtain. The shaft is the “Heart” of any Roller Shutter Door and allows the curtain to roll up neatly.
Guide locks are a push in pin lock mechanism, pushed through the guide and curtain of the `roller shutter door and housed in a steel casting welded to the guide.
Centre locks are key operated locks situated in the center of the T-Bar with locking bards which slide horizontally into slots provided in the two channel guides.
PUSH UP OPERATION
This type of door is suitable for relatively small openings. The weight of the curtain is counter-balanced by the self-coiling action of the spring-loaded barrel and the door is operated by use of the lifting handles fitted to the bottom T-Bar.
An endless chain through a spur reduction gear fitted to the spring-loaded barrel can operate larger doors of between 8 and 30 sqm mechanically.
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 doors may require double reduction gearboxes.
Electrical operation is recommended for large doors in frequent operation, although this type of operator can be specified for any size door. In the case of electrically operated doors, the supply would include the electrical motor, push button, and remotes. The unit would be fitted with an emergency hand chain operator for use in the event of power failure. Many other features can also be supplied such as card readers, inductive loop circuits, automatic operation, etc.
WICKET ACCESS DOOR
Wicket gates can be fitted to most roller shutter doors and are used for personnel or emergency escape use. The standard dimensions are 635mm wide x 1830mm high and can be specified as inward or outward opening, and located on the left or right.