An annular-ring (ring-shank) drywall nail is preferred for its ability to provide better holding power. For drywall that is 1/2" thick, what is the minimum length of nail required?

The correct answer is based on the standard practices for fastening drywall to wooden studs. When using annular-ring (ring-shank) nails for drywall installation, the nails must penetrate sufficiently into the underlying wood framing to ensure the drywall is securely attached.

For drywall that is 1/2 inch thick, the length of the nail must be long enough to penetrate not only the drywall but also provide enough holding power by anchoring into the wood stud. A 1-1/4 inch long nail achieves this by allowing 3/4 inch of penetration into the wood framing after accounting for the 1/2 inch thickness of the drywall.

Selecting a nail that is too short may compromise the stability of the drywall installation, as it would not provide adequate holding power. Conversely, a nail that is too long could potentially cause issues, such as piercing through the other side of the stud or creating unintended damage. Therefore, 1-1/4 inch is the optimal length for achieving the necessary grip while adhering to best practices for drywall installation.