What does the span refer to in roof framing terms?

In roof framing terminology, the span refers specifically to the distance between the outside top plates of the walls that provide support for the roof structure. This measurement is crucial in design and construction because it helps determine the load that the roof will bear and affects the choice of materials and framing style.

Understanding span is vital for ensuring stability, structural integrity, and adequate load distribution across the roof. Accurate measurement of the span influences factors like the type of rafters used, their spacing, and the overall design of the roof. Thus, knowing the span is essential for builders and architects when conceptualizing and constructing a roof system.