Gable End Truss Offset Siding
No, the 2x 10 is installed like a stud, vertically, 24" oc. It's nothing like your pic. Squash blocking is a 2x 4 nailed tight between the vertical 2x 10's so they can't move. The correct terminology for this type of application is called cantilevering the gable end trusses.
Looking at the drawings you have posted, it appears that the truss is still carried on the plate line, just moved out some for a shadow line. The method you have posted will work as long as 1/3 of the thickness of the truss is bearing on the plate. Otherwise, you're putting the wood in a shear load and wood doesn't do that well especially when it's the thickness of a 2x that's in shear.
Last edited by TrapperL; 07-29-2011 at 12:47 PM.