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Re: [TRNSYS-users] TJI floor

Matt,
  It depends a bit on what you have above and below the floor...

1. if you have a floor above the joists but nothing below them (ie there is no ceiling in the zone below) then I would ignore the joists and only treat the layers of the floor in the model (flooring and subfloor).

2. if the joist cavities are insulated, you can either figure out the total floor area that is flooring, subfloor, joist web, ceiling and the total floor area that is flooring, subfloor, insulation, ceiling and have two different "wall" types. Or you can ratio the two areas and come up with an equivalent material. This second option is how those TESS 2x4 stud walls were created).

3. if you have a floor above and a ceiling below but no insulation be careful not to just use the equivalent thinkness of air in the cavity as an insulator. The R-value for air that is typically reported is for stagnant air and floor cavities are not sealed enough for that air to be stagnant. You'll end up with much too high an insulating layer.

Kind regards,
 David


Matt Fung wrote:

What layers should I use to create a TJI floor or are there already layers created in the library that can be used (ie TESS 2x4 stud wall)?  Thanks.

 

Matt Fung

Associate Engineer

7407 Tam O’Shanter Drive

Stockton, CA 95210-3370

Phone: 209.473.5000 / Fax: 209.474.0817

MFung@ConSol.ws

www.ConSol.ws

 

You can call me directly at 209.473.5002

 


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