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Unread 05-10-2019, 04:27 PM   #7
...unrepentant, detail focused, over-analyzer.
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Join Date: Jan 2013
Location: Virginia
Posts: 2,832
I ran the numbers on the tools; looks good.

Originally Posted by Deflecto
Thank you for using the John Bridge Forums Deflect-O-Lator :-)

For joists that are SYP or Douglas Fir, in good condition, 9 inches tall, 3 inches wide, 16 inches on center, and 12 feet long between supports, the deflection calculated is 0.138 inches.

This translates to a deflection of L / 1043.

Since the maximum deflection for tile is L / 360, and for natural stone is L / 720, your floor is rated for Ceramic tile or Natural stone, Congratulations!
Those results aline with my calculations too.
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