With notches the gable roof overhang loads and the gable rafter partial load.
Garage door header on gable end.
16 garage door headers the garage and other window and door openings are prescriptive see figure r602 10 6 2 alternate braced wall panel adjacent to a door or window opening a minimum 3 x 11 25 net header size is required for opening from 6ft to a maximum 18 ft.
Window door garage door headers supporting roof loads only.
Loading conditions are detailed below.
As such the wind loads c c on the gable end will be felt by the garage door header and sizing of the header may be affected by this increased biaxial loading situation d 6w or d 0 75 0 6w 0 75 s.
That would take care of the wind and seismic shear loads.
The point load of the door should be within 2 of each outside wall you re putting another 6x6 posts there right.
If the gable rafters are continuous and without any notches for the look outs out riggers the header would only support the wall framing above.
For each application a pdf download is available.
Also see assumptions for table development.
Two overhead doors ten foot wide plus a 3 foot man door need between 26 and 30 foot of linear space depending on how tight i want to go to the walls and between garage door bays.
They may suggest doubling up the trusses at the gable end in order to hand the header.
Window door garage door headers supporting roof wall floor loads.
Really kind seems to me like i ll save floor space by putting the doors on the gable end.