| A | B |
|---|
| Root Opening | A separtion at the joint root between the workpeices. |
| Root Face | That portion of the groove face adjacent to the joint root. |
| Groove Face | The surface of a joint member included in the groove. |
| Bevel Angle | The angle formed between the prepared edge of a member and a plane perpendicular to the surface of the member. |
| Groove Angle | The total included angle of the groove between workpieces. |
| Groove Weld Size | The joint penetration of a groove. |
| Plate Thickness | Thickness of the basr metals to be welded. |
| Theoretical Throat | The distance from the beginning of the joint root perpendicular to the hypotenuse of the largest right triangle that can be inscribed within the cross section of a fillet weld. |
| Effective Throat | The minimum distance minus any convexity between the weld root and the face of a fillet weld. |
| Actual Throat | The shortest distance between the weld root and the face of the fillet weld. |
| Weld Root | The points, shown in a cross section, at which the root suface intersects the base metal surfaces. |
| Fillet Weld Leg | The distance from the joint root to the toe of the fillet weld. |
| Weld Toe | The junction of the weld face and the base metal. |
| Weld Face | The exposed surface of a weld on the side from which welding was done. |
| Depth Of Fusion | The distance that fusion extends into the base metal or previous bead from the surface melted during welding. |
| Fillet Weld Size | The lengths of the largest isosceles right triangle that can be inscribed within the fillet weld cross section. |
