How should nominal 1" collar ties be attached to common rafters?

Nominal 1" collar ties should be attached to common rafters with three 16d nails at each end to ensure a strong and secure connection. Collar ties are horizontal members that help stabilize the roof structure by preventing the rafters from spreading apart under load. Using three nails provides adequate shear strength and distribution of force across the collar tie, minimizing the risk of joint failure.

The choice of 16d (16-penny) nails is appropriate because they are commonly used in carpentry for framing and provide enough holding power necessary to secure the collar tie firmly to the rafters. This attachment method is aligned with building codes and practices, which emphasize the need for strong connections in roof framing to withstand wind and snow loads effectively.

Other methods, such as using fewer nails or screws, may not provide the same level of strength and durability. For instance, using only one nail or two screws might not adequately resist the forces acting on the collar ties during severe weather conditions, potentially compromising the structural integrity of the roof. Additionally, brackets may not be conventional or practical for this specific application, leading to unnecessary complexity or inadequate support.