Porch Truss Profile/Framing
Porch Truss Profile/Framing
(OP)
Hey everyone,
I'm working on a wood project with wood roof trusses. Single story - SDC C and normal wind. I have a proch roof with a shallow slope all over the perimeter of the building. I have some plcaes my exterior wall job so my bearing point goes away and I can't make the normal truss profile work. I've modified the normal truss to provide a "porch truss" so I can span to the exterior walls (see attached - the typical "porch truss modification is on the right). In the attached example I have my typical porch truss on the right side and a short beam for truss bearing on the left. The wall jogs out on the left so I also have a longer portion of overframed porch roof.
My questions are:
1) Is the porch roof even resonable? I don't want to pawn my problems off on the truss designer
2) Does it seem economical to provide a porch truss profile on the left as well and then just frame the roof to a ledger on the truss?
Thanks!
I'm working on a wood project with wood roof trusses. Single story - SDC C and normal wind. I have a proch roof with a shallow slope all over the perimeter of the building. I have some plcaes my exterior wall job so my bearing point goes away and I can't make the normal truss profile work. I've modified the normal truss to provide a "porch truss" so I can span to the exterior walls (see attached - the typical "porch truss modification is on the right). In the attached example I have my typical porch truss on the right side and a short beam for truss bearing on the left. The wall jogs out on the left so I also have a longer portion of overframed porch roof.
My questions are:
1) Is the porch roof even resonable? I don't want to pawn my problems off on the truss designer
2) Does it seem economical to provide a porch truss profile on the left as well and then just frame the roof to a ledger on the truss?
Thanks!






RE: Porch Truss Profile/Framing
RE: Porch Truss Profile/Framing
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Porch Truss Profile/Framing
Kootk - You think it's more economical than the overframing appraoch? As far as building envelope goes I think the truss would stop at the exterior wall so it would be sheathed to the underside of the roof. I would attach the outside porch joists (or rafter rather) to a ledger of some kind that's attached to it.
Really appreciate the help!
RE: Porch Truss Profile/Framing
RE: Porch Truss Profile/Framing
RE: Porch Truss Profile/Framing
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Porch Truss Profile/Framing
RE: Porch Truss Profile/Framing
RE: Porch Truss Profile/Framing