Notches under the rafters allow the ledger stock to be full dimension on the ends to better support the return framing.
Roof return framing.
The rise or height of the roof at its peak is the altitude of the triangle.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Return eaves a common roof structure is made of trusses or rafters.
Run both boards long and cut in place.
Whether you are framing a cornice return capped with a hip roof or a shed roof the first step is to install the subfascia and the ledger.
This structure supports all roof sheathing materials such as plywood sheathing underlayment and of course shingles.
The run or half the building span is the base of the triangle.