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Can i drill a 2.5" hole through a joist?

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  • Can i drill a 2.5" hole through a joist?

    Don't know if it is safe to drill a 2.5" hole through a joist for vent pipe. How about sister that portion and then drill a hole?
    Last edited by thisnewowner; 02-11-2011, 03:05 PM.

  • #2
    Re: Can i drill a 2.5" hole through a joist?

    here is the answer: http://www.selfhelpforums.com/showthread.php?t=8136

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    • #3
      Re: Can i drill a 2.5" hole through a joist?

      Just leave 2" of meat from the bottom of the pipe to the bottom of the joist..I try to leave 1" from the top ..But I'm a plumber we butcher everything ..Also I would try to keep 2' from the end of a joist for a 2" hole , 3' for a 3" hole etc..Atleast that's what we use to do
      ''Beer is proof that God loves us and wants us to be happy" Benjamin Franklin

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