What is the term for the distance from the joint root to the toe of the fillet weld?

The term that describes the distance from the joint root to the toe of a fillet weld is known as the "fillet weld leg." This measurement is critical as it indicates how far the weld extends from the base material into the fillet joint on each side, providing essential information about the strength and integrity of the weld. The legs of a fillet weld are vital for ensuring adequate penetration and bonding of the materials being joined, and they influence factors such as load-bearing capacity and resistance to various types of stresses. Understanding the dimensions of the fillet weld leg allows welders to assess whether the weld meets design specifications and standards that ensure structural safety. Other terms, while related to welding, do not accurately describe this specific measurement.