What is the maximum spacing allowed for rafter ties?

The maximum spacing allowed for rafter ties is 4 feet. This regulation is in place to ensure that the rafter system remains structurally sound and can effectively distribute loads. Rafter ties serve to prevent the walls from spreading apart due to the load of the roof, especially in cases of heavy snow or wind pressure. Maintaining this specific spacing helps to ensure that the ties can adequately provide support and prevent any structural failure over time.

The code and best practices are based on extensive engineering studies, which show that ties spaced further apart would not adequately resist lateral forces, increasing the risk of structural compromise. The choice of 4 feet as the standard strikes a balance, allowing for sufficient strength while also considering practical construction methods. This spacing is consistent with guidelines established by building codes and architectural standards.