I am actually faced with two jobs where clients want to extend rafter tails. The attached file shows a deck with a shed roof. In order to reduce rain getting on the deck, client wants to add length to rafters.
The rafters are birdsmouthed an bear on a beam. Is there a ratio for acceptable cantilever?
For example overhangs on gable end of roofs are usually framed with lookout rafters. The overhang is equal or smaller than the length of rafter inside the wall.
Any thoughts on how to make this work appreciated.