Birds Mouth Depth?
Birds Mouth Depth?
(OP)
We have 2X12 roof rafters spanning 10'4 from ridge to wall which is less than 1/2 the distance code allows it to span. Code states a birds mouth cut can only cut into a rafter 1/4 of the depth...since a 2x6 can technically span the 10'4" is it possible to cut the birdsmouth 1/2 the depth of the 2 X 12 rafter?
RE: Birds Mouth Depth?
Also, much of the grading of lumber has to do with knotches and knots in the extreme fibres. A 2x12 ripped down to 5 1/2" deep may not grade the same as a 2x6.