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

3-4 inches
13%
4-5 inches
50%
5-6 inches
15%
6-8 inches
11%
8-10 inches
9%
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Question: What is the most typical thickness of a slab-on-grade concrete foundation?
Top Answer (50% of 44 votes): 4-5 inches.

Answer: 4-5 inches
Explanation: The most typical thickness of a slab-on-grade concrete foundation is 4 to 6 inches. This range provides adequate strength and support for most residential and light commercial buildings. A 4-inch slab is generally sufficient for single-story homes and light structures, while a 6-inch slab is recommended for heavier loads, multi-story buildings, or structures in areas with challenging soil conditions. Proper subgrade preparation, including compaction and moisture control, and the use of reinforcement materials like rebar or wire mesh, are crucial to ensuring the slab's stability and durability over time.
Midtex Services
Answer: 5-6 inches
Explanation: 4 to 6 inches is ideal because it's anchored by the footing and stem wall.
Solid Solutions Concrete LLC
Answer: 4-5 inches
Explanation: Per engineer
Capristo concrete
ProMatcher
Answer: 3-4 inches
Explanation: Standard Inchehes for Residential Concrete Slabs
Hill Country Foundation Repairs & Remodeling
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
ProMatcher
Answer: 8-10 inches
Explanation: A "Slab-on-grade concrete foundation" is an atypical term. Typically, the foundation is thought of as being comprised of elements of Spread, Strip, Turndown, and Deep Bearing footings, with the slab representing the floor of the building. Although it is not abnormal to build the floor and footings in a single monolithic piece, the footings are generally considered to function as the foundation, while the slab functions as the floor. Monolithic slabs vary in thickness from 4" in non-load bearing portions of the floor, to 24" in load bearing portions.
Maven Group 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
ProMatcher
Answer: 8-10 inches
Explanation: Normally the footing will be approx 1 ft deep depending on where your building. That's why its called a footing.
h and h company
Answer: 4-5 inches
Explanation: With footings
Garcias Concrete Service LLC,
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