ChiefChris1

FIRE RATED FRAMING

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I am looking for span tables for FIRE RATED LUMBER.  Specifically floor joists.

I have a clear-span of 17'10 3/8"
We want to span that with fire rated lumber.  (AFL?)
I need the dimensions of the lumber for my section/elevation dimensions.
Does anyone have a reference?

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You need to know the species/grade and type of treatment. In general terms, you do a calculation based on untreated wood, and modify those values by a factor that is a result of testing. I would call tech support at http://www.frtw.com/ to see what they have available.

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