How to overframe a blind valley / california valley on a hip roof?
I’ve attached 3 files. I’m building my own 28×40 shop framed with 2×6 walls which has an 8/12 pitch hip roof with engineered trusses. The engineered truss package does not include the false gable over the left garage door so it must be over-framed. While searching for some examples on how to do this correctly, I’ve discovered the “false gable” is also referred to as a “blind valley” or “california valley.”
I have no problem framing the blind valley itself, what I am trying to figure out is the gable end itself which needs to be sheathed and the overhang to the left of the garage door.
Does the gable end, which is flush with the front wall of the garage, sit on top of the hip roof’s jack trusses (which need to have overhang cut off flush with the front wall) or do the jack trusses need to be cut back 1-1/2″ allow the gable end to sit directly on the top plate?
Any assistance or a pic worth a thousand words would be welcome!
Replies
There are a number of if's here. Will the truss maker shorten the trusses behind the gable?
I'd probably sheath the hip first and build the gable on top. In the sketch, I left out the sheathing for clarity. It's one way to do it, I'm sure there are other options.
If you stud the gable, you'd have the opportunity to reinforce the truss tails if they have to be field cut.
Thanks for the reply. I've attached another pic. Trusses are already on site and installed, less the hip rafters and corner jack trusses. They'll be up today. So, no the truss manufacturer did not cut those trusses short.
Your pic is helpful. I'll likely take your advice and sheath the hip then build hip on top. Thanks again!
Really have to start with full understanding of the roof truss package before thinking about cutting any part of it..
I would think you want the roof deck overhang supported by the gable end to the wall below (and door headers to wall jack studs down to the foundation) rather than on the truss package rafter overhang, unless specifically engineered for these loads.