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Notch Repair on Roof Rafters

Notch Repair on Roof Rafters

Notch Repair on Roof Rafters

(OP)
Have existing roof rafters that are notched at an interior knee walls about 6 feet from the base of the rafters. The architect wants to move those knee walls "outward" to 4 feet from the base.  Any recommendations on notch repair?  Any design/detail references?

I'm considering plywood on one or each side, but I'm not sure what to use for design values.  Maybe another material would be better.  I'm also considering a strap along the bottom of the rafter to help with bending.  

Thanks.

RE: Notch Repair on Roof Rafters

Moving the wall places the notch in bending (both compresion and tension).  Consider scabing lumber ~4' long, same sized as the rafter on each side.

RE: Notch Repair on Roof Rafters

strap the underside with well nailed or screwed sheats of plywood which in effect turns each member into a structural beam

RE: Notch Repair on Roof Rafters

Whatever you do will look like a hack job.  Why would an architect or builder want to foist such a thing on an owner and why would an owner accept such garbage?  Replacing the lumber is the only ethical thing to do.  I would not try to cover up or patch rafters that are now inadequate because the architect changed his/her mind or goofed.  Perhaps I'm being harsh....especially not knowing the real situation.

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