Garage Door Header Construction

If it s 9ft the opening must be 9ft 3 inches and so on.

Garage door header construction.

Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening. On previous projects i have been supplied a glu lam boise makes specifically for garage door headers that was 3 1 2 x 11 1 4 x 18 9. Building a structural header for a garage door opening can be handled on the jobsite and will offer the same structural support as more expensive solid wood beams. This piece of lumber will be used to attach the center bracket of your garage door spring assembly.

Big headers for big openings garage doors and other large openings require headers too beefy to be made from standard lumber. 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. Local and national building codes have specific structural requirements pertaining to beam sizes to span specific wall openings relative to the wall loads so consult your local building department before beginning this. This is a typical spacing for most residential construction.

Cut a 2 x 6 piece of lumber and nail to the face of wall exactly in the center of the garage header. This beam is suitable for garages with a second floor above. The beam they have specified now is 3 1 2 x 12 x 18 9. You get the picture.

These fabricated wood products can span longer distances and carry greater loads. Last pull a measurement from the top of the 2 x 6 piece of lumber that you just installed to the ceiling of the garage. Attach lumber to the face of the garage wall to the edge of the garage door header. Layout the bottom plate and one of the top plates at 16 on center.

The width of the rough opening should be 3 inches greater than the width of the garage door you are purchasing. That means you will place wall studs every 16 inches.