If rebar is not in direct contact with soil or weather, the encasement can be less than 3 inches.

• A. It can be less than 3 inches
• B. It must be at least 3 inches
• C. It must be at least 2 inches
• D. It must be at least 4 inches

Answer: (A)

Minimum concrete cover over reinforcing steel depends on environmental exposure. The cover protects the steel from moisture, chlorides, and other corrosive agents, and it also ensures good bonding with the surrounding concrete. When the rebar is not in direct contact with soil or weather, the surrounding environment is less aggressive, so the encasement does not have to meet the full 3-inch minimum. In that situation, it can be less than 3 inches. The other options impose a fixed minimum, which isn’t required under this non-exposure scenario.