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[Shop-talk] hanging a tub.

To: <shop-talk@autox.team.net>
Subject: [Shop-talk] hanging a tub.
From: "Mark Miller" <markmiller@threeboysfarm.com>
Date: Sun, 17 Jan 2010 13:02:03 -0800
I have an acrylic American Non-Standard tub.  Its instructions say it has to
be a full bottom contact install - I set it in a mortar base per these
instructions.

The cast tub does not because it will 'oilcan' if there is full bottom
contact.  It needs a bit of room when it expands and contracts with a full
load of hot water.  It isn't really bad for the tub but it freaks people out
and causes them to call their plumber, builder, or (even worse) the American
Standard customer support folks. 

The hanging install is on 5 studs on the long side and 3 one each short side
- 22 nails.  That's plenty of support, less than 40 pounds per nail.  If it
makes you nervous you can always double up on the studs and get more nails
in there, or mortise in a 3 x 4!

Mark Miller
Measure once, curse twice. 


<<<    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_34
9.pdf

    Why would it be bad to have the tub contacting the floor?  Thanks.

--
  David Hillman
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