What is the minimum nominal thickness required for wood framing supporting gypsum board?

The minimum nominal thickness required for wood framing supporting gypsum board is crucial for ensuring that the structural integrity and support of the wall system are adequate. A nominal thickness of 2 inches provides sufficient strength and rigidity to support the weight of the gypsum board while adhering to building codes and standards.

Using framing that is too thin may not provide the necessary support, leading to potential sagging or cracking of the gypsum board over time, especially in situations where the board is exposed to moisture or thermal expansion. Adequate thickness also facilitates better attachment of the gypsum board, ensuring that screws or nails have enough grip in the wood substrate.

In summary, a minimum nominal thickness of 2 inches is specified to ensure that the wood framing can adequately support the gypsum board, maintain the structural integrity of the wall, and comply with best practices in construction.