2. Fillet Welds
Unit 15

3. Objectives 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.

4. Fillet Weld Approximately triangular Actual throat
Shortest distance between weld root and face of weld
Affects strength of weld

5. Parts of a Fillet Weld

6. Dimensions for Fillet Symbol
Dimension for arrow side fillet on arrow side of reference line
Weld size
Shown to left of weld symbol
Specified dimension is minimum size unless otherwise noted

7. Fillet Weld with Unequal Legs

8. Weld Length Shown to right of weld symbol Weld-all-around symbol
For all geometric shapes
Round parts
Length may be given in degrees

9. Weld Length Given in Degrees

10. Hatching Shows extent and location of fillet weld
Additional arrows used for abrupt changes in weld direction

11. Intermittent Fillet Welds
Intermittent weld
Broken by unwelded spaces
Pitch
Distance between centers of increments on one side of joint
Shown to right of length dimension
Staggered intermittent weld
Weld increments staggered on both sides of joint

12. Intermittent Fillet Weld with Symbol

13. Staggered Intermittent Fillet Weld with Symbol

14. Fillet Welds in Holes or Slots

15. Fillet Weld Contours Specified when specific welded shape is desired
Flat
Concave
Convex
Indicated by contour symbol

16. Combination Weld Symbols
Other types of welds can be used with fillet welds
Fillet symbol and other weld symbol included on welding symbol

17. Example of Combination Weld Symbol