The distance measured from the top of a member to the point of tangency defines what in welding?

The distance measured from the top of a member to the point of tangency typically refers to the depth of a flare-V-groove weld. In this type of weld, the geometry involves a rounded edge that allows for proper fusion and strength, and the specific measurement from the surface to the point where the weld begins to taper creates an important parameter for assessing the weld's integrity. This measurement is crucial as it influences the weld's strength and how well it can handle operational stresses.

Understanding these properties is essential in welding design and quality control, as the depth at which the weld penetrates can directly affect the overall performance of the weld joint in application. Given this context, knowing how to measure and interpret the depth of a flare-V-groove weld aids in ensuring compliance with the specified requirements in technical drawings and welding procedures.