Half the span refers to which term in roofing?

Half the span in roofing specifically refers to the total run. The span of a roof is the distance from one side to the other, typically measured horizontally. The total run is essentially half of this measurement, representing the horizontal distance from the center ridge of the roof to the outer edge or eave. This term is significant in roofing calculations, as it helps determine the angle of the roof and the length of the rafters. Understanding the concept of total run aids in accurate calculations for materials and structural support requirements in roofing applications.