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Old 01-18-2010, 12:33 PM
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Silverback51 Silverback51 is offline
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Quote:
Originally Posted by madmaxx View Post
go buy a 4 post lift, they do not need anchored. I would think the whole floor or larger than 16x16 would have to be replaced. I imagine the bending moments on your bad can get pretty high. 2000lb times 4 feet? = 8000 ft-lbs of torque, it does not seam a 16x16 square would not pop out off the ground and let the thing turn over.
As long as it's tied into the existing slab he will be okay. Otherwise you are correct. I would pull out of the floor.

Here is a link to how to tie into existing slabs.

http://www.finehomebuilding.com/how-...ete-slabs.aspx

Also, you need to maintain a 1 to 1 ratio between depth of the anchor to the edge of the slab to avoid break out. This means with a 4 inch anchor, you have to have a minumum of 4 inches to the edge of the slab, or slab joint.
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