Lintel (header height)
Vertical space between the top of the opening and the ceiling of the garage. Determines the track type.
Definition
The lintel (or header height) is the distance between the top of the garage door opening and the ceiling. It dictates track choice and sometimes the door type possible. On new-build, 200 mm is typical. On existing garages, this dimension is often tight.
Track choice by lintel
- N (standard track, torsion springs): 210 mm minimum for a powered door.
- L (low headroom, torsion springs): 115 mm for a powered door, 100 mm manual.
- With ThermoFrame or RC2 burglar-resistant equipment, the required headroom increases slightly.
- Z (tension springs): 115 mm for a powered door, 100 mm manual.
- H (high-lift track): for large headroom, the tracks run up the wall before turning under the ceiling (not available on the LPU 67 Thermo).
Measurements to take
- Total ceiling height.
- Opening height.
- Difference = available lintel.
- Also check the depth under the ceiling: for a sectional door, slightly more than the door height, including tracks and operator.
Related terms
Frequently asked questions
My lintel is 90 mm, can I install a sectional door?
Not with a Hörmann sectional door: Z and L tracks need at least 100 mm for manual and 115 mm for powered operation. With 90 mm, the RollMatic OD up-and-under door, which needs only 60 mm, is the solution. A RollMatic roller door, on the other hand, needs 290 mm.
Mechanics
Back to glossarySectional door
Garage door made of horizontal hinged panels that rise to the ceiling along side tracks.
Torsion spring
Horizontal helical spring that balances the weight of the door leaf and allows effortless manual opening.
Roller box
Housing at the top of the opening that holds the rolled-up curtain of a roller door.