What is the term used to describe the difference between the throat height and the heel height of an elbow gore?

The term that describes the difference between the throat height and the heel height of an elbow gore is referred to as "Rise." In the context of sheet metal and piping, the rise is an important measurement because it helps determine the fit and angle of the elbow gore, affecting how it connects in a system.

Understanding the rise is essential for ensuring that the piece fits properly in the intended application. The rise essentially represents the vertical distance between the changes in direction of the elbow. It plays a vital role in calculating the necessary dimensions and ensuring the elbow functions correctly in terms of flow and structural integrity.

Other choices refer to different concepts in sheet metal work. "Fall" typically relates to the slope or drop in drainage systems, "Angle" may refer to the degree of the elbow itself, and "Curve" might relate to the smoothness or radius of the bend, none of which specifically address the difference in height measurements for an elbow gore.