West Virginia Contractors License Practice Exam

What is the minimum compressive strength required for a concrete basement slab with negligible weathering potential?

1. 1500 psi

2. 2000 psi

3. 2500 psi

4. 3000 psi

The correct answer is: 2500 psi

The minimum compressive strength required for a concrete basement slab with negligible weathering potential is 2500 psi. This strength ensures that the concrete can adequately support the loads it will be subjected to during its lifespan without compromising structural integrity. For a basement slab, where conditions are generally stable and protected from direct exposure to weathering factors like freeze-thaw cycles, the specifications allow for a lower strength compared to outdoor applications. However, it is still crucial to have a compressive strength that meets a solid standard for durability and longevity. While other options might appear feasible for certain applications, they do not align with the typical requirements established in building codes for concrete subjected to foundational loads. Therefore, 2500 psi represents a balance of strength and economy for a basement slab, making it the most appropriate choice for this context.