Massachusetts Unrestricted Construction Supervisor License Practice Test

What is the minimum required compressive strength of concrete (f'c) when used in a commercial building?

1. 2,500 psi

2. 3,000 psi

3. 2,000 psi

4. 3,500 psi

The correct answer is: 2,500 psi

The minimum required compressive strength of concrete for use in a commercial building is typically set at 3,000 psi. This value is aligned with industry standards and building codes, which emphasize the importance of ensuring that the concrete can withstand the loads and stresses it will encounter over its service life. Adequate compressive strength is crucial for the safety and durability of structural elements in commercial buildings, such as floors, walls, and foundations. The option stating 2,500 psi falls short of this standard, as it does not meet the minimum requirements typically mandated for commercial applications. While the compressive strength of 2,000 psi is sometimes acceptable for specific applications or low-load conditions, it is insufficient for general use in commercial projects. Similarly, 3,500 psi may be appropriate for certain specialized applications but exceeds the minimum standards set for standard commercial construction. Thus, while stronger concrete can provide additional safety margins, the essential standard remains at 3,000 psi for most commercial building scenarios.