If your walls are non load bearing a single top plate is all that is required.
Non load bearing garage door header.
A header is to hold something up.
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.
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.
Section r502 5shares allowable girder and header spans.
Pro tip you can access a free copy of the 2012 international building code here.
Non load bearing windows and doors do not require a structural header.
I d use a double 2x6 laid flat at the head of the opening.
The load that you need to resist is the horizontal force on the wall above the new door.
When framing in 16 centers a good rule of thumb when figuring material is one wall stud per foot of bottom plate.
This will usually give you the extra studs needs for corners and door openings.
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.
A header needs a full or king wall stud on each side of the opening extending from the bottom wall plate to.
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.
If they are load bearing a double top plate is required.
Framing an interior door header starts with the width of the door typically 32 inches although this.
Measure the width of your door frame.
Most door frames that are 4 feet wide or less require a 2 by 6 header.