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