20 Foot Garage Door Header

Window door garage door headers supporting roof loads only.

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. It worked for most of the applications in our case house. Table number grade live or ground snow load psf dead load psf load duration factor c d. Calculating header size is no picnic as you learn how to frame a window.

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. 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.

Measure the width of your door frame. Wide a common patio door width. 11 run 20 year shingles and no snow load whatsoever. This product is new and distributors don t want to stockpile inventory.

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. That would take care of the wind and seismic shear loads. The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness. When in doubt use 2 by 12 inch headers.

Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening. And that s with a 7 12 hip roof avg. 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. 20 header over garage door.

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. Most door frames that are 4 feet wide or less require a 2 by 6 header. If you want to build it right go with the lvls. It is worth noting that the 18 foot garage door header application pushed timberstrand beyond its structural limit.

I have seen too many garage door openings sagging after 10 15 years.