20 Foot Garage Door Header

20 header over garage door.

20 foot garage door header.

Window door garage door headers supporting roof loads only. That would take care of the wind and seismic shear loads. It worked for most of the applications in our case house. Calculating header size is no picnic as you learn how to frame a window.

When in doubt use 2 by 12 inch headers. I have seen too many garage door openings sagging after 10 15 years. And that s with a 7 12 hip roof avg. Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.

I did a garage with a br above once it was a long span i don t remember how far the plans called for a gluelam with a 1 camber what a pain that was it did nt sag though. The span above the door opening is framed with a long header that supports the wall area above the door and this header will need to be raised or rebuilt in order to increase the overall door size. Table number grade live or ground snow load psf dead load psf load duration factor c d. Wide a common patio door width.

11 run 20 year shingles and no snow load whatsoever. It is worth noting that the 18 foot garage door header application pushed timberstrand beyond its structural limit. Most door frames that are 4 feet wide or less require a 2 by 6 header. Wide window and door openings and in most situations be code compliant for openings up to 6 ft.

Measure the width of your door frame. If there isn t enough room above the opening this can t be done without raising the roof of the garage. I ve even seen 2 1 3 4 x12 lvl headers in a 2x4 garage door wall sag while we were framing the house. 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.

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. Timberstrand header comes only in 3 widths in depths that range from 4 3 8 to 18. This product is new and distributors don t want to stockpile inventory. If you want to build it right go with the lvls.

The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness.