What is the maximum spacing of nails on center for 1/2 in gypsum board when installed perpendicular to framing members without adhesive?

The maximum spacing of nails on center for 1/2 inch gypsum board installed perpendicular to framing members without adhesive is 8 inches. This spacing is specified in building codes and standards to ensure adequate attachment of the gypsum board, which aids in achieving proper performance attributes such as structural integrity, fire resistance, and sound attenuation.

By limiting the spacing to 8 inches, the board is securely fastened, minimizing the risk of sagging or buckling under various conditions. Proper nail spacing also helps to prevent the formation of cracks in the gypsum board, particularly in environments subject to moisture or temperature fluctuations. Additionally, this standard spacing is designed to accommodate the consistent distribution of loads and stresses throughout the board, providing overall durability and longevity of the installation.

While other options may suggest larger spacings, they do not adhere to the guidelines necessary for ensuring that the board remains firmly in place and performs as intended over the lifespan of the installation.