Massachusetts Construction Supervisor License (CSL) Practice Test

What is the minimum required size for wood columns used in the foundation of 1 and 2 family dwellings?

1. A. 4 in. x 4 in.

2. B. 3 in. diameter

3. C. 3 1/2 in. diameter

4. D. 6 in. x 6 in.

The correct answer is: A. 4 in. x 4 in.

The minimum required size for wood columns used in the foundation of one- and two-family dwellings is determined by building codes that ensure structural integrity and safety. A wood column with a minimum size of 4 in. x 4 in. provides sufficient load-bearing capacity for typical residential applications. This size is commonly accepted for supporting beams and loads in standard construction practices. In contrast, while a 3-inch diameter column may seem adequate, it does not provide the same level of stability and load-bearing capability, especially for larger or heavier structures. The 3 1/2-inch diameter option is also less than the commonly accepted minimum for foundational columns. A 6 in. x 6 in. size is stronger and provides more support but is considered oversized for typical one- and two-family units, making it unnecessary for regulatory minimum requirements. Therefore, the option of 4 in. x 4 in. effectively balances sufficient strength with practical dimensions for residential foundation work.