ChiefChris1 Posted October 10, 2017 Share Posted October 10, 2017 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? Link to comment Share on other sites More sharing options...
Richard_Morrison Posted October 10, 2017 Share Posted October 10, 2017 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. Link to comment Share on other sites More sharing options...
chief58 Posted October 10, 2017 Share Posted October 10, 2017 are you looking for something like this, I am in Pa also and the builders I work for use these for long spans http://bluelinxco.com/files/StructuralFramingProducts/EngineeredLumber/onCENTER AFL Floor and Roof Product Guide_sm (1).pdf Link to comment Share on other sites More sharing options...
AndyGump Posted October 10, 2017 Share Posted October 10, 2017 You may be looking for fire rated assemblies. Try this link. http://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/usg-fire-resistant-assemblies-catalog-en-SA100.pdf Link to comment Share on other sites More sharing options...
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