Most door frames that are 4 feet wide or less require a 2 by 6 header.
Non load bearing garage door header.
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.
The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam.
The beam they have specified now is 3 1 2 x 12 x 18 9.
A header needs a full or king wall stud on each side of the opening extending from the bottom wall plate to.
I d use a double 2x6 laid flat at the head of the opening.
If they are load bearing a double top plate is required.
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.
If your walls are non load bearing a single top plate is all that is required.
Pro tip you can access a free copy of the 2012 international building code here.
The load that you need to resist is the horizontal force on the wall above the new door.
Non load bearing windows and doors do not require a structural header.
This is non bearing so you could use studs to create the space down from the roof or ceiling for the roll up door to roll up into.
Section r502 5shares allowable girder and header spans.
Framing an interior door header starts with the width of the door typically 32 inches although this.
When in doubt use 2 by 12 inch headers.
When framing in 16 centers a good rule of thumb when figuring material is one wall stud per foot of bottom plate.
Framing for a non load bearing door header measure the door.
Measure the width of your door frame.