18 Ft Garage Door Header

There are a few sizes of doors that are considered standard.

18 ft garage door header.

18 ft garage door is the size that is suitable for you who have a oversized garage. The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam. Calculating header size is no picnic as you learn how to frame a window. Also see assumptions for table development.

For each application a pdf download is available. Window door garage door headers supporting roof loads only. Window door garage door headers supporting roof wall floor loads. For single car garages include 8 x 7 ft 8 8 ft 8 9 ft 9 8 ft 10 7 ft and 10 8 ft.

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. The standard size for double garage doors is 16 feet wide and 7 to 8 feet high. Loading conditions are detailed below.

The beam they have specified now is 3 1 2 x 12 x 18 9. 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. 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.

Measure the width of your door frame. Wide a common patio door width. Many 16 x 7 garage doors will be designed with a pair of single 8 foot garage door bays separated by a central post or column. When in doubt use 2 by 12 inch headers.

In all but the most bizarre situations they ll easily carry the weight for 4 ft. Many homeowners have two cars and need garage space to shelter them both. Many home builders do not consider this a structural necessity but a style and price choice for the homeowner.