02-25-2009, 06:04 PM
I can't quite make sense out of your description of what's going on, but if it is different than what the plans call for, contact your architect and have them inspect the forms before the concrete is poured. It is his/her responsibility to make sure the plans are structurally sound and it is the contractor's responsibility to follow the plans unless the architect knows about the changes and approves them.
Generally a slab foundation will have thickened edges as well as deeper/thicker areas under posts and areas of heavy load. There would generally be a thicker layer of concrete under any walls, especially support walls. Usually the slab is poured on top the compacted gravel with 6" x 6" 10/10 welded wire mesh across the entire slab area and at least several bands of rebar around the edges. There is sometimes more rebar in the thickened areas under posts.
The compacted gravel, plastic moisture barrier and welded wire mesh/rebar are always in place when the concrete forms are inspected. I'm not sure what you mean by "footprint or imbeds of any sort" but if he can pour the walls as part of the foundation, it would be stronger than to do it in two pours.
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Kurt Wilson
Generally a slab foundation will have thickened edges as well as deeper/thicker areas under posts and areas of heavy load. There would generally be a thicker layer of concrete under any walls, especially support walls. Usually the slab is poured on top the compacted gravel with 6" x 6" 10/10 welded wire mesh across the entire slab area and at least several bands of rebar around the edges. There is sometimes more rebar in the thickened areas under posts.
The compacted gravel, plastic moisture barrier and welded wire mesh/rebar are always in place when the concrete forms are inspected. I'm not sure what you mean by "footprint or imbeds of any sort" but if he can pour the walls as part of the foundation, it would be stronger than to do it in two pours.
Kurt Wilson
Kurt Wilson