How many nails are used to attach diagonal, let in, wood bracing to a stud?

The correct answer is that two, 8d face nails are used to attach diagonal, let-in wood bracing to a stud. This standard practice is supported by construction guidelines which emphasize the importance of using appropriate fastening methods to ensure adequate structural integrity and support.

Using two 8d nails provides sufficient hold for the diagonal wood bracing while ensuring that the wood fibers are not overly stressed. This helps maintain the bracing's intended structural function to prevent lateral movement of the wall frame. The choice of 8d nails, which typically measure 2.5 inches, is also suitable for this kind of application as they strike a balance between penetration and holding power.

Other options, such as using more nails or larger sizes, would be unnecessary for this application, as over-fastening can lead to wood splitting or other structural issues. Thus, the standard practice of employing two, 8d face nails is both efficient and effective for attaching diagonal let-in bracing.