Framing an interior door header starts with the width of the door typically 32 inches although this.
Non load bearing garage door header.
Framing for a non load bearing door header measure the door.
A header is to hold something up.
If your walls are non load bearing a single top plate is all that is required.
When in doubt use 2 by 12 inch headers.
Non load bearing windows and doors do not require a structural 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.
I d use a double 2x6 laid flat at the head of the opening.
Most door frames that are 4 feet wide or less require a 2 by 6 header.
This will usually give you the extra studs needs for corners and door openings.
For instance in the basement remodel all the doors have simple 2 4 framing around them.
If they are load bearing a double top plate is required.
Section r502 5shares allowable girder and header spans.
Measure the width of your door frame.
Pro tip you can access a free copy of the 2012 international building code here.
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.
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.
The load that you need to resist is the horizontal force on the wall above the new door.