Answer: 46 inches Explanation: Do not wanna pour less than 3 inches or will most likely crack 
Chris's Concrete/Home Improvements 
Answer: 46 inches Explanation: Industry standard is 46 inches depending on the use of slab. The thicker the slab the more weight it can support. 
TN Concrete Restoration 
Answer: 46 inches Explanation: Depends on the application 
Cronin Construction & Resource Management, LLC 

ProMatcher 
Answer: 46 inches Explanation: Its the average standard for strength and durability of concrete for its purpose. 
BAT Concrete llc 
Answer: 46 inches Explanation: This aplies to non post tension slabs which are 10 inches 
Concrete Designs 
Answer: 68 inches Explanation: We've always done 6 to 8 just for foundation purposes 
SouthPac Construction 

ProMatcher 
Answer: 46 inches Explanation: Normal slab for residential structure would be 4". There are grade support beams through the slab also. 
Design4 
Answer: 46 inches Explanation: 4 usually is ok , but if there is load bearing walls that will be framed on new slab then thickened slab or footing needs to installed. 
Concrete services 
Answer: 46 inches Explanation: Our average thickness is 4in and we use #3 rebar on 16in centers with 3000 psi concrete. 
A to Z Fence and Concrete 

ProMatcher 
Answer: 46 inches Explanation: Residential concrete slabs should always be poured at 4 to 5 inches with compacted fill and footers at blueprint spec,to avoid any sinkholes in the future. 
Lals Concrete Company,LLC 
Answer: 46 inches Explanation: 4""
is sufficient 
LPG,LLC 
Answer: 46 inches Explanation: This really varys it all depends on how the house foundation is built and also where it is built. I have done homes in Georgia that where post tensioned and the footing only where 12 inches. Then I have done homes in Michigan and footing where min 27 inches. It depends on the specs and the climate you live in 
h and h company 

ProMatcher 
Answer: 46 inches Explanation: Sometimes 8 inches and with wire mash 
Garcias Concrete Service LLC, 