Wood framing supporting gypsum board shall not be less than how many inches nominal?

The correct answer is based on the requirements set forth in the North Carolina Residential Code regarding the support of gypsum board by wood framing. The code specifies that wood framing that is used to support gypsum board must have a nominal size of at least 2 inches. This is to ensure sufficient strength and stability in the framing system, allowing it to properly support the weight of the gypsum board and any other loads it may encounter. A nominal width of 2 inches provides the necessary structural integrity while also allowing for efficient installation and attachment of the gypsum board, helping to prevent issues such as sagging or failure over time.

Options that suggest a size of 1 inch, 3 inches, or 4 inches would not meet the minimum requirements for adequate support. A 1-inch nominal framing would lack the necessary strength for a secure installation, while 3 inches and 4 inches, although adequate, exceed the minimum requirement and may not be necessary for typical residential construction. Hence, the specified minimum of 2 inches is both practical and code-compliant for supporting gypsum board adequately.