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SMURAN 06-04-2009 11:57 AM

Structral Question
I am looking for the formula for the different sized boards for the joist (ex. 2 X 6, 2X 10)

The formula that I am looking for is how to calculate the maximum span I can run my floor joist using a deflection of L/360. and I am also looking for the spacing between joist. I am not sure what a good pounds per square foot would be, I am not putting a hot tub or anything on the deck.

I know there are places on line that I can enter the type of wood I am using but in the size of board I want to use and specify the spacing that I would like to use and it will calculate the span that I should not exceed. But I am looking for the formula that is used to arrive at that answer if anyone can help me out.

thedeckbarn 01-09-2010 06:07 PM

you will need or should probably go to an engineering site to see if that is available. Might try a university also
steve scholl

lnkddbz 07-15-2010 06:41 AM

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I think for this you have to look for a engineering website..

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thedeckbarn 12-31-2010 04:52 PM Here is a how to that will give you the formulas you are looking for. There were made by The American Wood Coulnci.

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