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  1. #1
    Join Date
    Mar 2007
    Location
    Chicago, IL
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    2,797

    Default Minimum throat depth for conventional wood stringers

    Does the IRC specify a minimum throat depth at stringers cut from conventional lumber, or is there another source for such recommendations? (I can find a lot of information on-line for engineered wood products used as stringers, but nothing for conventional sawn lumber...)

    Thanks.

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  2. #2
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Minimum throat depth for conventional wood stringers

    I don't see anything in the NC code about stringer size....


  3. #3
    Join Date
    Mar 2007
    Location
    Garland, TX
    Posts
    622

    Default Re: Minimum throat depth for conventional wood stringers

    might get shot for this but as i recall from wood framing days

    Throat depth:
    3” for 9” stringer
    5⅞” for 11⅞” stringer
    8” for 14” stringer
    Lumber should be Min. No. 2 hem-fir, spruce-pine-fir or better grade

    let the bullets fly

    badair http://www.adairinspection.com Garland, TX 75042 TREC # 4563
    Commercial-Residential-Construction-EIFS-Infrared Thermography
    life is the random lottery of events followed by numerous narrow escapes

  4. #4

    Default Re: Minimum throat depth for conventional wood stringers

    Barry,

    That's what is called for by Boise Cascade for their Versa- Lam stringers. http://www.bc.com/dms/wood/ewp/3_Gui...rstep.ptdddddd

    I've seen both 4 and 5" min. called for with conventional lumber, so I am curious as well.............The American Wood Council calls for a min. 5" throat: http://vil.albion.ny.us/content/Depa...ts/File/51.pdf Fig. 28


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