Anyone have direct experience framing 48″ OC who can discuss how/if you can make a rigid sub floor across such a large span, with laminated engineered joists supporting the sub floor?
I normally use Advantech for my sub floor, and their specs say that a 1 1/8″ sheet can span 48″ OC, but never having done it I am hesitant. The finish floor will be 8″ plank flooring glued & nailed, but this is a family room that will likely see a lot of party traffic and I’m worried about bouncy floors.
I am trying to avoid framing between the joists because I am trying to expose their full height below, but if I have to I will frame between them and pack the ceiling down.
If you have direct experience with large spans I’d love to hear it.
Replies
have never built that way, but i have done repairs to a house with this system. Bouncy floors will be your biggest issue (specially if your planning on having parties). sections of the house i worked on had 1'' 1/8 subfloor and sections with 2x6 tongue and groove. the tongue and groove sections were noticably stiffer.
havent done much research on this system but from what i understand its a west coast thing that came about mostly to achive low profile homes, girders being alowed to be 6'' closer to grade than joist.
32"
A good compromise would be 32" centers. 1 1/8 is pretty stif over this span. When you add the glued and nailed planks it should be even better. From below 32" is wide enough to not feel too busy and give the feeling of open beam.