Technical Info – Roller Shutters
TECHNICAL INFORMATION FOR ROLLER SHUTTERS
- For opening height apertures up to 2100 mm, please allow 255 mm for shutter box (ideal 305 mm)
- For opening height apertures from 2100 mm to 2700 mm, please allow 305 mm for shelter box (ideal 355 mm)
- For opening height apertures from 2700 mm to 3300 mm, please allow 355 mm for shelter box (ideal 405 mm)
For sizes taller than these please seek advice from our office, sizes above these tend to require 460 mm clearance and above.
- For opening height apertures up to 1200 mm, please allow 250 mm for shutter box (ideal mm)
- For opening height apertures up to 2400, please allow 300 mm for shutter box (ideal mm)
- For opening height apertures from 2400 mm to 3400 mm, please allow 350 mm for shutter box (ideal 350 mm)
For sizes taller than these please seek advice from our office, sizes above these tend to require 400 mm clearance and above.
Please note the above headroom clearances are the minimum requirements needed in order to obtain a clear height. It would always be prudent to leave more space than the minimum clearance requirements.
ROLLER SHUTTER MOUNTINGS
Typically steel angle iron or steel box section, roller shutter mountings are either front fixed on the inside or outside wall of an opening between 100 mm to 150 mm past the opening on each side.
(Too near to the edge of the brickwork could cause cracking whilst drilling to the brickwork).
Side fixed roller shutters tend to be within brick reveals, this method reduces headroom and the width of the opening.
Clearances should be considered when reveal fixing roller shutter mountings.
ROLLER SHUTTER ENDPLATES
The weight of the curtain determines the thickness of the roller endplates in order to cope with deflection.
Typically smaller shutters are made from 3 mm thick galvanized steel MS plate.
Medium shutters are made from 6 mm thick galvanized steel MS plate.
Larger shutters are made from 8 mm, 10 mm, and 12 mm thick MS plate.
ROLLER SHUTTER BARRELS
Sizes and construction are determined by curtain weight versus deflection tolerances: Smaller shutters tend to be a 100 mm OD tube x 16 swg thick.
Medium shutters tend to be a 100 mm OD tube x 9 swg thick.
Large shutters tend to be a 127 mm OD tube x 9 swg thick.
Industrial shutter doors have differing sizes to suit application; please contact our office for advice.
COIL CASING OR CANOPIES
1 mm thick galvanized steel is folded for rigidity, with double edged folds to prevent sharp edges.
Grease and debris are chemically removed from steel surfaces to allow positivity and negativity charged particles of powder to attract to steel surface by means of electrostatic.
Oven baked to 200°C for approx. 12 minutes.
Anti vandal lacquers can be applied to aid the removal of graffiti.
50 mm, 65 mm, 75 mm, 100 mm or wind lock guide for large shutters, 3 mm thick roll formed galvanized steel.
75 mm deep scroll curvy lath, interlocking type, lateral movement prevented by either plastic, steel endlocks or riveted endlocks.
Useful Information on Curtain Weights
22 swg/.7mm thick solid curtain = 9.5 kg m²
22 swg/.7mm thick perforated curtain = 8.5 kg m²
20 swg/.8mm thick solid curtain = 11.5kg m²
20 swg/.8mm thick perforated curtain = 10.5 kg m²
18 swg/.9 mm thick solid curtain = 16.5 kg m²
ALSO ALLOW FOR BOTTOM RAIL
Width of door x 4kg for bottom rail.
Electrical operation instead of spring barrels works by a tubed or external motor, either 240V typically pulling 5 amp, or a three phase motor typically pulling 8 amp