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  1. #1
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Clearance between grade and TJI

    Is there a min clearnace requirement between grade and TJI's?

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  2. #2
    Join Date
    Mar 2007
    Location
    Washington State
    Posts
    579

    Default Re: Clearance between grade and TJI

    Typicall building practices require 18 inch clearance between joists and soil below, and 12 inches between support beams and soil below. I would personally allow 12 inches if it was just a small area. As a WDO inspector this is condsidered a conducive condition for wood destroying insects and wood rot. Also I would be recommending a vapor barrier be installed on crawlspace ground.


  3. #3
    Philip's Avatar
    Philip Guest

    Default Re: Clearance between grade and TJI

    Trent, I think you nailed this one. Are seasoned builders doing this, or is this the first time for the builder. One of the most important facts you can find out is how many and how long has this builder been in the business. From the looks of how far the beams are from the dirt I would say this builder needs a slap on the head to wake him up. If he can not get this part of construction correct, what else happened under his supervision.


  4. #4
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,549

    Default Re: Clearance between grade and TJI

    Quote Originally Posted by Philip View Post
    Trent, I think you nailed this one. Are seasoned builders doing this, or is this the first time for the builder. One of the most important facts you can find out is how many and how long has this builder been in the business. From the looks of how far the beams are from the dirt I would say this builder needs a slap on the head to wake him up. If he can not get this part of construction correct, what else happened under his supervision.
    I suspect it's an add-on

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  5. #5
    Join Date
    Aug 2009
    Location
    Minnesota
    Posts
    4

    Default Re: Clearance between grade and TJI

    This brings up a question I thought was somewhat related. (but maybe completely a different condition.)

    I'm drawing plans for a house that is to have TJI's cantilevered outside/beyond the foundation and sheathed with 1/2"treated plywood.

    Do I understand code still allows for as little as a 6"clearance if the untreated wood is outside the "periphery" of the foundation?


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