When referring to a rafter, what does the term 'run' denote?

The term 'run' in relation to a rafter specifically refers to the horizontal distance that the rafter spans from the peak of the roof down to the point directly above the wall it supports. This measurement is essential in roofing because it impacts the overall height and pitch of the roof. Understanding the run is crucial for proper rafter installation, ensuring that the roof has the desired slope for water drainage and structural integrity.

The height of the rafter pertains to the 'rise,' which describes how tall the rafter is from the base to the peak. The distance covered along the roof refers more to the total length of the rafter, while the angle of the rafter relates to the slope or pitch, which affects the overall aesthetics and functionality of the roof design. Therefore, the correct definition of 'run' aligns with the width that a single rafter covers in the horizontal direction, making it a fundamental concept in roofing construction.