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-   -   Attic Floor Joists (https://www.askmehelpdesk.com/showthread.php?t=200906)

  • Mar 31, 2008, 06:51 PM
    bat840
    Attic Floor Joists
    Wondering if anyone knows what is recommended for floor joists when developing an attic? My existing ceiling rafter is 2x6 so I will need to sister another joist in, what size... 2x10??
  • Mar 31, 2008, 07:51 PM
    hkstroud
    It all depends on the span of the joist.
  • Apr 2, 2008, 08:37 AM
    ballengerb1
    2x10 is now the recommended size of a new roof rafter, floor joists are 2x12 but span does play a part.

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