How many nails do you use on each end of bridging?

Using two #8D nails on each end of bridging is the standard practice in carpentry. Bridging refers to the installation of diagonal bracing in floor joists or rafters, which helps to prevent lateral movement and provides stability to the structure.

The choice of #8D nails is appropriate as they offer the right balance of strength and size for securing bridging. Typically, a #8D nail has a length of 2.5 inches, which is well-suited for penetrating most materials encountered in framing. Furthermore, using two nails on each end ensures a stronger and more secure connection, enhancing the overall structural integrity. This practice is essential because it distributes the fastening load more evenly and helps resist any potential shifting or settling over time.

When considering the other options, it's important to note that using only one nail, regardless of its size, would not provide the same level of security. Conversely, while using #16D nails offers greater length and strength, it is generally not necessary for bridging, as the excessive size can cause splitting of the materials being joined and may not match with standard bridging practices. Thus, employing two #8D nails is the well-established and recommended approach in carpentry for securing bridging effectively.