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Thread: Joist question

  1. #1
    Join Date
    Mar 2008
    Location
    Park City, Utah
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    Default Joist question

    Is this type of joist rated for exterior exposure. Several joists were sistered under a hot tub and the water from the tub was deteriorating the joist. But,I was curious what everyone knows about these.

    Thanks

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  2. #2
    Join Date
    Mar 2007
    Location
    Oregon
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    2,365

    Default Re: Joist question

    Wow, all kinds of problems there....

    Leaking tub of some type

    Boring in the lower 1/3 of the joists

    And no, I'd say that's not an 'outdoor' piece of lumber. However, I think the decking might give out before the joist.... kind of a race, really

    That's a glue-lam of sorts, definitely not intended for outdoor use... under a hot tub.


  3. #3
    Join Date
    Aug 2007
    Location
    Memphis TN.
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    4,311

    Default Re: Joist question

    Weyerhaeuser makes it .
    .
    http://www.ilevel.com/literature/TJ-7000.pdf
    .
    Also as treated / exterior applications ( PSL )

    http://www.ilevel.com/literature/TJ-7100.pdf

    Last edited by Billy Stephens; 06-30-2008 at 10:47 PM. Reason: treated link
    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  4. #4
    David Banks's Avatar
    David Banks Guest

    Default Re: Joist question

    Second PDF posted by Billy says PSL for exterior use.
    Rusty nails not good.
    Is deck bolted to house. Proper flashings?


  5. #5
    Join Date
    Mar 2008
    Location
    Park City, Utah
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    Default Re: Joist question

    Thanks for the info. I spoke to a rep today and he said they have to be wolmanized for exterior use. Also the hole drilled is not an issue. Thanks for the web site, very helpful.

    Mat


  6. #6
    Join Date
    Mar 2007
    Location
    Healdsburg, CA
    Posts
    1,741

    Default Re: Joist question

    If those drilled holes are within 2 inches of the bottom of those framing support members its a violation of IBC 2308.10.4. (2007 CBC same)

    Jerry McCarthy
    Building Code/ Construction Consultant

  7. #7
    Ron Bibler's Avatar
    Ron Bibler Guest

    Default Re: Joist question

    Good eye Jerry.

    Best

    Ron


  8. #8
    Join Date
    Mar 2008
    Location
    Park City, Utah
    Posts
    1,530

    Default Re: Joist question

    Jerry,
    What if the joists are sistered, does that negate the detrimental effects of holes being drilled in the lower third.


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