What is the minimum thickness required for a ridge board?

The minimum thickness required for a ridge board is 1 inch nominal. This specification is based on the need for structural integrity and proper load distribution when rafters are framed to the ridge. A ridge board serves as a support for the upper ends of the rafters, and having a thickness of at least 1 inch ensures that it can adequately handle the stresses placed upon it by the roofing material and environmental loads such as snow or wind.

Using a ridge board with a thickness less than this minimum would compromise the structural stability of the roof framing, potentially leading to sagging or failure under load. Therefore, the 1 inch nominal thickness is a crucial requirement to ensure a properly functioning and safe roof structure.