What is an acceptable tolerance for floor joists (subfloor not laid, yet) over a 4 ft span in an old home? How far out (in height) is acceptable?

  • What is it that you are trying to do? There is a lot more info needed than your question provides
    – Jack
    Nov 25, 2016 at 0:11
  • Sounds like Laxmidi is asking min. dim. of FJ over a 4'0" span. A Hem.Fir. / Pine 2x4 would be fine @ 16" center (spaced apart). Though anything less than 2x6 would make me uncomfortable re: deflection. Nov 25, 2016 at 3:11

1 Answer 1

  1. maybe 18. hard to tell without knowing how many monkeys and typewriters are needed.

for the love of god, phrase your question intelligibly. what tolerance are you asking for? width? height? span? material? youngs modulus? what on earth do you mean by how far out in height?

garbage in, garbage out

  • You're right. My question was not clear. I shouldn't type while tired! I'll edit it shortly.
    – Laxmidi
    Jan 14, 2017 at 20:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.