In order to install torsion-spring hardware, we recommend a clearance of 12 in. (305 mm). On the other hand, if there is only 4 ¾ in. (121 mm) to 12 in. (304 mm) available, it is best to use a dual-track system designed for low headroom. When equipping a garage door with an electric door opener, add 2 in. (51 mm) to standard lift movements. For a low-headroom system, you do not need the additional 2 in. (51 mm).
| Torsion1 | Operation type | Extension2 | Operation type |
|---|---|---|---|
| 0″ à 4 ¾” | Not possible (lower the headboard of the door) | 0″ à 4 ¾” | Not possible (lower the headboard of the door) |
| 4 ¾” à 12″ | Low Headroom (double track system) | 4 ¾” à 8 ½” | Low Headroom (double track system) |
| 12″ and higher | Standard (12″ radius)3 | 8 ½” and higher | Standard (10″ radius) |
Conversion: 1 in. = 25.4 mm
- Garaga recommends the use of torsion springs for improved door operation and increased safety.
- Garaga recommends the use of safety cables with extension springs for more security.
- You can order a 15-inch radius with torsion spring operation.
Important: If an electric operator is being used, add 2 inches (51 mm) to the headroom required for standard lift operation.