Vision-Air roller
This is specially designed to provide (free) air flow and a see through security screen thus giving protection against vermin and debris. This door is commonly used on underground car parking entries and where airflow and security is required e.g. security entrances, bottle shops, boiler rooms, sub-stations, mall entries etc.
Suggested Specification
The vision-air roller shutter will be manufactured by 3rd Generation Doors. The curtain will be constructed using 75mm, 100mm or 130mm by 1.0mm thick galvanised steel roll formed interlocking slats. The slats will be fully perforated with 2mm perforations to the entire slat face. Alternative slats will be fitted with nylon end clips. The door will be operated by chain or electric motor where specified. The curtain will be pre paint finished to colour specified.
Curtain
The curtain will be constructed using 75mm, 100mm or 130mm by 1.0mm thick galvanised roll formed interlocking slats. The slats will be fully perforated using 2mm perforations. Each alternative slat will be fitted with nylon end clips to prevent lateral movement.
Bottom Rail
The bottom rail will be specially extruded heavy duty interlocking aluminium angle section and where doors are over six metres in width they will be fitted with a rolled hollow steel box
Guide Channels
Guide channels will be manufactured from roll formed galvanised steel channel section having a depth of either 65mm or 75mm and matched to suit doorway..
Operation
Will be either by means of a hand chain through a suitable gear reduction for ease of operation or motorised using a three phased reduction geared motor incorporating limit switches and emergency hand chain operation in case of power failure.
Centre Mullions
Centre mullions can be provided for multiple installations normally of a sliding type to suit applications where required.
Size
Doors up to 6 metres in height and 7 metres in width. All heavy doors are recommended to be motorised.
Finish
We recommend that ail shutter curtains be painted either by using the powder coating process or using polyurethane paint. Guide channels galvanised and all other components to be given a priming coat of zinc rich grey primer.
Roller Drum
The drum will be a steel cylindrical tube encasing helical torsion springs matched to suit door weight and size and revolving on a steel axle.
Support Brackets
The support brackets will be fabricated from mild steel plate having a minimum thickness of 6mm and matched to the door weight and size with provision made for fixing to brickwork or steelwork.
