Minimum requirements for Sectional Doors

OPTION 1: Standard Lift / Torsion Front

Backroom: Doors up to 7' [2134mm] high are supplied with a horizontal track measuring 101" [2565mm], for up to 8" [2438mm] high doors 113" [2870mm]. To achieve the minimum backroom requirements (without opener) the horizontal track should be cut to door height + 8" [203mm].

Distance to underside of horizontal track door height + 4 5/8" [117mm].

Drive through clearance = door height -1" [25mm].

OPTION 2: Low Headroom / Torsion Rear

Backroom: Doors up to 7' [2134mm] high are supplied with a horizontal track (including bearing plates) measuring 107" [2718mm], for up to 8' [2438mm] high doors 119" [3023mm]. To achieve the minimum backroom requirements (without opener) the horizontal track (including bearing plates) should be cut to door height + 14" [356mm].

Distance to underside of horizontal track = door height - 5/8" [16mm].

Drive through clearance without operator = door height - 4" [102mm]. Drive through clearance with operator = door height - 1 1/2" [38mm].

* For Liftmaster openers other brands may require different dimensions.

** 39" required for standard height doors (Opener may require modification).

Sectional door plan (with door in open position) showing Front Torsion:

Sideroom and Headroom:

Limited sideroom option available to suit 70mm jambs, with minimal impact on drive through width.

OPTION 3: 3" Frame Option

If your sideroom and headroom are restricted, our unique 3" frame option for sectional doors provide the solution.

Backroom: Doors up to 7' [2134mm] high are supplied with a horizontal track (including bearing plates) measuring 107" [2718mm], for up to 8' [2438mm] high doors 119" [3023mm]. To achieve the minimum backroom requirements (without opener) the horizontal track (including bearing plates) should be cut to DOOR HEIGHT  + 14" [356mm].

Distance to underside of horizontal track = door height - 3 5/8" [92mm].

Drive through clearance without operator = door height - 7" [178mm]. Drive through clearance with operator = door height - 4 1/2" [114mm].

* For Liftmaster openers other brands may require different dimensions.

Additional Requirements

• The area around the opening needs to be structurally sound & strong enough to support the door.
• The surface to which the door is to be fitted should be reasonable smooth & flush although small irregularities, for instance brick or blockwork, are acceptable.
• The lintel must be flush with the rear of opening piers and not protruding forwards or backwards.

If your opening does not meet the listed requirements, please contact us - we probably have the answer.