My guess is they don't want create stress points that could cause
cracks. If the floor is uneven the tub might eventually conform to the
floor and the high points would be under stress and crack. Just a
guess.....
Ben....
On 1/17/2010 11:49 AM, David Hillman wrote:
> I picked up a new bathtub the other day, and am confused by one
> part of the installation document ( well, one part other than the math
> errors on certain dimensions ).
>
> The part I don't understand is why they emphasize not letting the
> tub's bottom contact the floor. It's an American Standard Americast
> tub ( Americast is a "unique three-layer construction consisting of a
> smooth porcelain-enamel finish bound to high-quality alloy that is
> backed by an injection-molded structure" ).
>
> It doesn't make any sense to me that the required installation is
> to hang the tub ( 700 pounds full of water ) from the 2x4 stringers,
> instead of letting the floor share the load. By following the
> directions, the entire weight of the tub will be supported by the
> nails through the stringers into the studs. Here are those
> instructions, if anyone is curious;
>
>
>http://www.americanstandard-us.com/assets/documents/amstd/install/Install_349.pdf
>
>
>
> Why would it be bad to have the tub contacting the floor? Thanks.
>
> --
> David Hillman
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