If you are intending to purchase and install the Steel Line roller door then you need to start by making sure you order and specify the right size roller door. The Steel Line roller door can only be installed to the inside face of a structural opening or behind a suitable structure such as a timber framework.
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Width Dimensions Explained
Maximum overall width for Steel Line Door = 5100mm
Minimum overall width for Steel Line Door = 1270mm.
The Overall Width is also the reference for the Ordering Width when purchasing a Steel Line roller door and is the Structural Opening Width plus the curtain overlap on each side which is 25mm each on a door up to 3348mm total width or 50mm each side on a door over 3348mm.
For the Rollguard security option add 35mm each side regardless of the width of the structural opening.
Example: A 2500mm wide garage opening requires a further 50mm adding for the 2 no. 25mm guides each side giving an Ordering Width size of 2550mm.
Summary of ordering width requirements
| ‘A’ Series door width | Opening width + 50mm (2”) minimum |
| ‘AA’ Series door width | Opening width + 100mm (4”) minimum |
| Rollguard (all doors) | Opening width + 70mm (2 3/4”) minimum |
Important:
The support brackets and fixing lugs on the guides make the total width required on a basic manual door 90mm wider EACH SIDE than the daylight opening width up to 3348mm wide and 120mm each side on wider AA series doors. Optional Rollguard guides require 150mm each side.
It is essential you calculate the total width required for installation purposes as it is wider than the ordering size!
See Table Below
Minimum Clearance Required per side of structural opening for installation (not ordering)
Door Type
Manual Door
Automatic Door
Motor side only
'A' series (up to 3348mm wide)
90mm
100mm
'AA' series (over 3348mm wide)
120mm
150mm
All size doors with 'Rollguard' option
150mm
150mm
Overview of Steel Line roller door viewed from inside a garage
Height Dimensions Explained
Maximum guide height for Steel Line standard = 3000mm
The Guide Height is also the reference for the Ordering size for a Steel Line roller door -
It is the total height of the side guides that the roller curtain slides in.
The amount of headroom required above the guide height is dependant upon the height of the door ordered, see table and diagram below:
Example: A floor to lintel height of 2150mm means ideally you would require 405mm of headroom and the ordering measurement would be 2150mm. If you don't have 405mm of headroom the roller door will still fit but you will lose drive through height when open. In the worst case of having no headroom at all then you will require a fascia cover of some description to cloak the roll from outside but your order height will be the total height less the roll size required. Always better to overestimate the height required with a Steel Line roller door as you can always cut the steel guides if they are too long.
The drive-through height is approximately 80mm less than the ordering opening height.
| Guide Height | Min. Headroom required for curtain roll |
| Up to 2134mm (7'0") | 380mm |
| Up to 2286mm (7'6") | 405mm |
| Up to 2438mm (8'0") | 405mm |
| Up to 2743mm (9'0") | 430mm |
| Up to 3048mm (10'0") | 455mm |
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Photograph of Steel Line roller door on the inside
Same door viewed from outside and finished in blue
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