adding a cement floor

Old 05-13-03, 05:57 AM
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adding a cement floor

Hey guys,
My basement currently has a dirt floor under a wood sublayer and carpet. I am going to tear all this out to put in a new cement floor to add a more comfortable and healthy living space. My question is. Do I need to know where the support beams are going to be located for the upper floor prior to laying the cement ? Does the cement need to be a greater depth where these will located? Or do they need to be set in the cement, in which case I must know....thanks
Old 05-13-03, 05:43 PM
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What's holding up the upper floor now?

Posts must sit on substantial footings, not on a slab. A typical footing is a cube of concrete reinforced with rebar. This footing will be much thicker than your slab. The size of the cube depends on the weight it must support.

Do you have posts now? What are they currently sitting on? If you already have posts and you have no problems with them now, there's a good chance they are already sitting on footings and you can just leave them alone. In fact, I suggest you leave them alone if you don't want your house to fall on your head.

I suggest you consult a structural engineer.

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