Coastal and Floodplain Construction Inspector's Practice Exam

According to the Home Builder's Guide to Home Construction, what is the minimum psi concrete that should be used?

1. 3000 psi

2. 4000 psi

3. 5000 psi

4. 6000 psi

The correct answer is: 5000 psi

The minimum psi for concrete used in residential construction is specified to ensure structural integrity and durability. The Home Builder's Guide to Home Construction typically recommends a minimum of 4000 psi, which offers a strong balance between strength, workability, and durability for typical residential structures. This strength level is capable of withstanding normal environmental stresses and loads experienced by homes, making it suitable for most applications including foundations, slabs, and other structural elements. Choosing a higher psi, such as 5000 psi or 6000 psi, may be appropriate for specific applications requiring additional strength or for structures subjected to harsher environmental conditions, but for general residential construction purposes, 4000 psi is often deemed sufficient and is therefore the recommended minimum. The specified psi reflects the compressive strength of the concrete after 28 days of curing, and using the right mix ultimately enhances the overall performance of the constructed home.