304 mm available it is best to use a dual track system designed for low headroom.
Garage door header requirements.
In order to install torsion spring hardware we recommend a clearance of 12 in.
Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
Header requirement 2 at minimum the header should be 12 wide with doubled 2 4 at opening and ceiling running the width of the door with a 2 4 in the center of the opening for the center bracket to attach to.
Window door garage door headers supporting roof loads only.
For door openings up to 36 nominal and for structures with no more than two floors above it s a safe bet that doubled 2x10s are adequate as a load bearing header.
It is possible to mount torsion springs in a garage with only 5 inches of headroom.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
Lay a single piece of the 1 inch by 11 inch lumber.
Loading conditions are detailed below.
Garage doors operating with torsion springs require a minimum of 9 1 2 inches of headroom while doors using extension springs require a minimum of 4 1 2 inches of headroom.
However this requires mounting the torsion spring on the rear of the horizontal tracks.
If you are installing a 9.
Rip 11 inch wide strips of inch plywood using a circular saw.
For each application a pdf download is available.
How much headroom is required above a residential garage door.
To finish the opening.
Window door garage door headers supporting roof wall floor loads.
An attached garage must be separated from the residence and its attic area by not less than 1 2 inch gypsum board applied on the garage side.
Without more detailed information that s as much as i can say.
Also see assumptions for table development.
Cut three pieces of 1 inch by 11 inch lumber to the width measurement of the garage door rough opening plus 12 inches.
If the door is 7.
Let s get started with your framing 1.
121 mm to 12 in.
On the other hand if there is only 4 in.