What strength concrete is normally used for the slab under a home?
Typical mixes range from 2500 pounds per square inch (psi) to 3000 psi, depending on the geography of the country and the quality of the raw materials. Sometimes we are asked if a different weight should be used for the garage area. This is not really necessary. Usually the biggest load on a slab is the heaving from the sub grade and not the structure on top of it (or the car).
