The cleanest look for a gable end with a closed eave is to angle the soffit therefore eliminating the need to resolve the eave at the gable end.
Frame gable roof soffit.
This is a very small amount but it will keep your soffit from bending later.
Begin at one bottom edge of the gable and slide the soffit into the f channel along the wall.
Set out the wall plates to whatever centers you need for your gable roof 400 450 600 or 900 governed by the weight of roof covering ie tiles and cut fix the joists so they are parallel to each other and flush with the back edge of the wall plates.
This configuration gives the look of an open eave but it has the same benefits ease of maintenance and energy performance as a closed eave.
The other end will be closest to you.
Gable roof soffit and fascia this video shows the framing process from start to finish of the gable end wall in this house on the loft side of the house.
This is how i did my pole barn workshop and at the end of the video i also show.
Ridge work out how wide you want the barge soffit boards.
With enclosed overhangs soffit will attach to this solid blocking.
Here s how to frame a boxed soffit on the eave and gable end of a building.