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What is "Slab-on-grade"?

What is "Slab-on-grade"?

What is "Slab-on-grade"?

(OP)
I have a besement with 2 meters below ground. Is the slab of  this besement floor(-2m) a slab-on-grade?

Is the slab of the basement ceiling  a slab-on-grade?
(assuming the ceiling slab is level 0m with thickness 200mm).

Which is slab-on-grade?

RE: What is "Slab-on-grade"?

A slab on grade is generally a concrete slab that bears directly on the ground and recives it support from the ground. A slab on grade is generally seperate from the foundation walls and does not carry any foundation loads (slab that is intregal with the walls and columns is a mat foundation). The basement floor especially in residential houses is usually a slab on grade. A slab that is supported by the walls and columns, such as the basement ceiling is refered to a suspended slab.
I qualify my answers somewhat because some people use these terms slightly differently, which yes can lead to some confusion. But if you were to say a slab on grade or suspended slab, this is what most people in the field would expect.

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