Answer: 45 inches Explanation: Depending on the weight that will be distributed on the surface. 
RP Enterprises 
Answer: 56 inches Explanation: concrete must to 5 to 6 inches tick for reinforcement and use rebars for the footings to reinforce 
RAMOS CONCRETE CONSTRUCTION 
Answer: 56 inches Explanation: Between 4" and 6" depending on the garage. 
Cronin Construction & Resource Management, LLC 

ProMatcher 
Answer: 45 inches Explanation: Its the average standard for strength and durability of concrete for its purpose to accomidate average vehicles. 
BAT Concrete llc 
Answer: 34 inches Explanation: Same as driveways 
QUALITY CONTRACTORS 
Answer: 67 inches Explanation: The standard concrete garage floor is six inches thick and, with use of proper control joints, should be thick enough to withstand normal use. 
Colorado Concrete 

ProMatcher 
Answer: 45 inches Explanation: If placed proper on compacted material with reinforced concrete 4 to 5 inches is good. 
Concrete services 
Answer: 45 inches Explanation: The standard thickness will depend on the use of the garage. We find that 4 inches of 3000 psi concrete is adequate for most applications. 
Alliance Construction 
Answer: 56 inches Explanation: A 6" slab is required for parking vehicles 
BellPro Construction LLC 

ProMatcher 
Answer: 45 inches Explanation: 4 is sufficient if done correctly with 8 in perimeter 
DIRTCO CONSTRUCTION 
Answer: 56 inches Explanation: All residential garage slabs should be poured over well compacted fill at 5 to 6 inches thick with footers 
Lals Concrete Company,LLC 
Answer: 56 inches Explanation: to support weight of automobile floor should be 6" and reinforced 
LPG,LLC 

ProMatcher 
Answer: 34 inches Explanation: Residential concrete garage slabs are typically 4" 
Concrete & Beauty Design 
Answer: 45 inches Explanation: Yes 
Garcias Concrete Service LLC, 