Security and Visibility
About Roller Grille Shutters
Safety roller grilles are a perfect way to cover broad opening widths while offering visibility as well as protection. The nature of our link profile ensures that the grille remains solid in both a brick pattern and a straight pattern and is made of reinforced aluminium hinges and ties, whilst the wide spacing between provides a high degree of visibility.
Our roller grille doors, while maintaining a high degree of protection, provide strong visibility, airflow and light. With excellent ventilation for smoke clearance and fume exhaust, it is the perfect shutter solution for the entrances and exits of carparks.
The door can be controlled or motor-driven manually. For smaller openings, the manual push-up is suitable and does not require a power supply. In the event of power loss, the powered motor arrives with a manual over-ride hand chain for urgent activity. With a fully enclosed configuration, the motor is adequately sized. The motor has a high starting torque, a built-in gear box and a heat protector built-in. The engine gearbox has an integrated centrifugal velocity regulator that ensures protection in the event of a free fall. An infinite hand chain is given for manual operation from the ground level in the case of power failure. To set the upper and lower limits for the movement of the curtain, adjustable limit switches are used.
The roller grille is composed of tubes and connecting parts of aluminium that are rigidly supported by galvanised steel rods.
In damp, cramped conditions, fresh air and ventilation minimise air pollution, bad odours, and the potential for mould formation.
Powder coat finishes
To show the identity of your brand and add a decorative feature to the internal and outsides or shopfront, your door has a wide range of colour choices available.
Excellent wind resistance
Due to a total airflow surface area of up to about 80 percent, the wind load force on the door is almost non-existent.
100 mm high and 330 mm wide, 3 mm thick UV-treated and non-toxic polycarbonate slats are finished with rounded top and bottom profiles. These slats are installed with nylon end caps to lock axial movement into upper and bottom oval shaped hollow extruded aluminium alloy hinges that are 30 mm high and 16 mm wide. Within the hinges, strengthened ribs have high impact strength and reduce the panels’ deflection well beyond most other contemporary designs. Nylon belts are placed around the edges of the curtains to generate a quiet and greaseless process.
The basic guide rails are cold-rolled to a ‘U’-shaped profile using a 3 mm thick galvanised steel coil. For opening widths of less than 3.5 m, sizes range from 60 mm to 36 mm, and for wider shutters, 90 mm to 36 mm. PVC weather strips can be supplied with optional heavy duty 3 mm thick aluminium guide rails that are 75 mm by 75 mm as an alternative.
The bottom bar is a ‘L’ shaped aluminium profile consisting of 60 mm high and 60 mm wide heavy duty extruded aluminium alloy. To obtain the PVC weather-seal, the base of the bar has dovetail grooves.
The shutter box consists of two heavy-duty steel endplates, 4 mm to 7 mm thick, depending on the size of the shutter; joined together by means of five 50 mm x 25 mm hollow steel parts, finished in black primer. The end plates are welded to attach the shutter box to the building frame using two 50 mm x 50 mm x 4.5 mm thick steel angles with slotted sealing holes.
The barrel is made of a heavy-duty seamless steel pipe, welded according to the size of the shutter, with axles from 35 mm diameter to 50 mm diameter. With heavy duty sealed roller bearings, this barrel is mounted to the right and left endplates.
The shutter box covers are made of steel sheets of 0.8 mm thick zincalume, with the edges folded purpose of providing stiffness.