20 Foot Garage Door Header

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.

20 foot garage door header.

Timberstrand header comes only in 3 widths in depths that range from 4 3 8 to 18. Between 4 and 5 feet the header should be built 2 inches wide and 8 inches long while a larger opening needs a header that is 2 by 12. When in doubt use 2 by 12 inch headers. 20 header over garage door.

Wide window and door openings and in most situations be code compliant for openings up to 6 ft. Wide a common patio door width. I ve even seen 2 1 3 4 x12 lvl headers in a 2x4 garage door wall sag while we were framing the house. 16 garage door headers the garage and other window and door openings are prescriptive see figure r602 10 6 2 alternate braced wall panel adjacent to a door or window opening a minimum 3 x 11 25 net header size is required for opening from 6ft to a maximum 18 ft.

I have seen too many garage door openings sagging after 10 15 years. Table number grade live or ground snow load psf dead load psf load duration factor c d. 11 run 20 year shingles and no snow load whatsoever. In all but the most bizarre situations they ll easily carry the weight for 4 ft.

That would take care of the wind and seismic shear loads. If there isn t enough room above the opening this can t be done without raising the roof of the garage. 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. Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.

Most door frames that are 4 feet wide or less require a 2 by 6 header. This product is new and distributors don t want to stockpile inventory. If you want to build it right go with the lvls. Calculating header size is no picnic as you learn how to frame a window.

It worked for most of the applications in our case house. The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness. 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. And that s with a 7 12 hip roof avg.

Measure the width of your door frame.