191 pitch staggered intermittent weld After completing Unit 15, you will be able to: ❍ Name the parts of a fillet weld. ❍ Determine weld size and weld length by interpreting the fillet welding symbol. ❍ Read and interpret a fillet welding symbol used for intermittent and staggered intermittent welds. ❍ Determine the weld face contour of a fillet weld. Key Words actual throat hatching intermittent weld A fillet weld is usually used when joining two surfaces perpendicular to each other or at an angle, Figure 15-1. It is approximately triangular in shape. The parts of the weld include the weld root, leg, toe, face, (Refer to Unit 13) and throat. The actual throat is the shortest distance between the weld root and the face of the weld. The throat affects the strength of the weld. General Use of Fillet Weld Symbol Welding symbols for fillet welds are shown in Figure 15-2. The dimension for an arrow side fillet weld is placed on the arrow side of the reference line (the same side as the weld symbol). Weld size is shown on the left side of the weld symbol. Unless otherwise noted on the print, the minimum size of a fillet weld is the specified dimension. Figure 15-1. Study the parts of a fillet weld. Leg Toe Face Actual throat Toe Leg Weld root Unit 15 Fillet Welds