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What is the most typical thickness of a slab-on-grade concrete foundation?

3-4 inches
4-5 inches
5-6 inches
6-8 inches
8-10 inches
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Question: What is the most typical thickness of a slab-on-grade concrete foundation?
Top Answer (46% of 30 votes): 4-5 inches.

Answer: 4-5 inches
Explanation: Standard concrete floor slab thickness in residential construction is 4 inches. Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks.
Rod Martin's Complete Basement Systems
Answer: 4-5 inches
Explanation: Foundation slabs are 4"to 6" thick except the footers which bear weight of structure and are at least 12"X18".
Allied Concrete LLC
Answer: 4-5 inches
Explanation: Slab-on-grade concrete foundations should have a minimum of 3~1/2" slab, a minimum footer depth of 18", and a minimum footer width of 12".
Cronin Construction & Resource Management, LLC
Answer: 5-6 inches
Explanation: Slab on grade for residential is 4" For Commercial it is 6"
Barrows Contracting Inc
Answer: 4-5 inches
Explanation: 4 to 5 inches usually is standard unless it is a heated floor or load bearing walls will sit on it.
Concrete services
Answer: 4-5 inches
Explanation: we do not pour slab on grade foundations in frost prone area
Answer: 4-5 inches
Explanation: With footings
Garcias Concrete Service LLC,
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