I guess I am slow here but I don't see a hip rafter the same as a common rafter. I know 802.3 says if the pitch is less than 3/12 the member must be "designed as beams" but I still fail to see how a hip and more importantly a valley can be sized by the same chart a common rafter. The WFCM seems to support this. First, by not mentioning hip and valley rafters; they use the term hip and valley beams, and second, by giving us a table for sizing these beams. If mu quick read of the thread is accurate by WFCM t3.28 you would have a beam that fits in the 8x8 area or 11'4 horizontal span row which would yield 2-2x6 (depending on loads). I am curious what the programs say about that. I have questioned engineers about why no single member greater than a 2x6 is offered in this table and been told that the seat cut becomes too risky for them.I have taken 802.3 in a different light. I beilieve that all structural ridges, hips and valleys are beams but that if the pitch is less than 3/12 802.3 requires them to be "designed" (engineered), otherwise the WFCM could be used.
Just one more illustration of the weakness of this section....IMHO!