What is the minimum number of 16d common nails that must be used to end nail a 2"x4" to a top or bottom plate?

The requirement for end nailing a 2"x4" to a top or bottom plate specifies that at least two 16d common nails must be used. This guideline ensures adequate structural integrity and stability in the framing system. Using two nails allows for better holding power, reducing the risk of the connection loosening over time due to stresses from loads or environmental factors.

Utilizing only one nail would not provide sufficient strength for the connection, leaving it vulnerable to failure under stress. Similarly, using more than two nails may be seen as excessive in this context, as well-established building codes determine that two nails are adequate to securely fasten these components together for most residential framing scenarios.