You have to take into account.
Non load bearing garage door header.
I d use a double 2x6 laid flat at the head of the opening.
The header is usually made out of dimensional lumber installed on its edge.
These charts are for 30 pound per square foot snow load on the roof.
The load that you need to resist is the horizontal force on the wall above the new door.
3 the building width.
Window door garage door headers supporting roof loads only.
Need help with building a door or window header.
1 the length of the window or door opening.
Includes span tables for all load bearing locations and the number of jack studs.
Non load bearing windows and doors do not require a structural header.
These are all term to describe and calculate door and window header sizes.
All doors are set into a frame an opening inside the wall.
Framing for a non load bearing door header.
4 the snow load in the area.
Think of a header like a small bridge.
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.
What exactly is a header.
Table number grade live or ground snow load psf dead load psf load duration factor c d.
The header for a door is much like a bridge transferring the weight above it to the floor and foundation below.
For instance in the basement remodel all the doors have simple 2 4 framing around them.
All other data is available on page 121 of the 2012 international residential code.
Doors in a load bearing wall that holds the weight of the house created by beams and trusses need a larger header than those in non load bearing walls.
You can access a free copy of the 2012 international building code here.
It s not really that difficult if you break it down into simple descriptive terms.
5 whether it s a bearing wall where joists trusses and rafters rest or a non bearing wall to which joists trusses and rafters run parallel.
Span charts and 2012 irc building codes for girders and headers.
A header is to hold something up.