How important is stacking?
Beardoh
| Posted in General Questions on
It seems that designing a home so that:
Roof Trusses sit directly over Wall Studs
And
Wall Studs sit directly over Floor Trusses/I Joists
would be a good idea…and maybe this is baked into architectural best practice?
Is it necessary?
As I make plans for a simple house in CZ6A, I wonder about stud spacing (I am planning on double stud wall, if that is relevant). The home is a simple single story rectangle. I am inclined to keep my floor I Joists 16″ OC, just for bounce and squeak reasons.
Studs on the other hand have some variability. I could go 24″ OC with 2×6 studs or 16″ OC with 2×4 studs.
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Replies
If you use a double top plate and single sill plate you don’t need to align any of the above mentioned
Thanks for your response. Is this yours? - https://www.freyrdesign.com/
Yep that’s mine
The APA has a really good guide on advanced framing you can download from their website:
https://www.apawood.org/advanced-framing
Advanced framing is a good idea, albeit more complicated, to reduce the "framing factor" of your 24" o.c. wall. In other words, the amount of surface area taken up by studs instead of insulation. The guide has all sorts of detail for two-stud corners, integrated window headers into the rim joist area, and a lot more. There is also a little savings in lumber by going with this method but it is definitely important to get the position of studs/joists correct when doing this.
For a stiffer floor assembly, consider upgrading the subfloor thickness. The TCNA requires 24" o.c. floor joists to use 1-1/8" subfloor for tile installation best practices. Also consider ordering TJI's with a wider flange such as a 2x4. Or just upgrade to full floor trusses instead of joists to make space to run mechanicals and wiring.
I like advanced framing for it's simplicity and savings, but there are a few places where having 16" OC makes more sense. Shower wall will need 16" oc for tile backer. Hanging cabinets and mounting shelves, TV, etc is a little easier with 16oc too.
If you're doing a double stud wall, then obviously less of an issue. Also, the thermal bridging is less of an issue with a double stud wall so one of 24oc's benefits isn't realized either.
I generally use 16" o.c. for floor and wall framing and 24" o.c. for roof framing, but sometimes those numbers vary.