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Re: stone floor deflection criteria

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The Marble Institute of America requires no more than L/720 total load deflection for stone/marble/slate floors. Also, the joists shall be at no more than 16"o.c. 

Mike Perakis, P.E.

>>> kspeoples(--nospam--at) 01/30/01 11:38AM >>>

I am doing a residential project that involves stone floors supported by wood joists.  The stone/setting bed thickness is about 3".  Can anyone direct me to a publication that would give a recommended deflection criteria for such a system.  I am leaning towards something like I would use for a masonry wall - say l/600 or l/700, but I would certainly like some back-up for my calculations.



Kenneth S. Peoples, P. E.
Lehigh Valley Technical Associates
1584 Weaversville Road
Northampton, PA 18067-9039
ph: 610-262-6345
fax: 610-262-8188
e-mail: kpeoples(--nospam--at) 

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