What is the minimum grade of studs required for non-bearing walls?

The minimum grade of studs required for non-bearing walls is determined by the standards specified for lumber classification, particularly referring to the DOC PS 20 (Department of Commerce Product Standard 20). This standard outlines acceptable grades of lumber for various applications including structural use. For non-bearing walls, the lumber does not need to meet as stringent structural criteria as bearing walls, but it still requires a standard to ensure adequate performance and durability.

DOC PS 20 categorizes lumber types and grades based on their characteristics, such as strength and appearance. When using this standard, builders and inspectors can ensure that the materials used for non-bearing walls provide sufficient integrity and longevity under normal conditions.

Other grades such as No. 2 and No. 3 may be acceptable in specific circumstances, but they do not represent the minimum requirement for non-bearing walls as per the established standards. Utility grade typically signifies lumber that does not meet the quality of No. 3 grades and is often used for non-structural applications, making it unsuitable for non-bearing walls under the standards implied by DOC PS 20. Therefore, adhering to the DOC PS 20 ensures compliance with safety and construction regulations.