A fillet welding symbol shows 1/4 to the left of the weld symbol and a single number, 6, to the right (inch units). What is required?
- One 1/4 in. fillet weld that is 6 in. long
- Six 1/4 in. fillet welds along the joint
- 1/4 in. fillet welds spaced 6 in. apart
- A 6 in. fillet weld made in 1/4 in. long steps
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A. One 1/4 in. fillet weld that is 6 in. long
A single number to the right of the weld symbol is the weld length. A count of welds is never shown this way, and spacing (pitch) would appear as a second number after a hyphen.
Reference: AWS A2.4, Standard Symbols for Welding, Brazing, and Nondestructive Examination: length of fillet welds
In an intermittent weld callout, how is pitch measured?
- From the end of one weld increment to the start of the next
- From the start of the joint to the center of the first increment
- From the center of one weld increment to the center of the next
- From the start of the first increment to the end of the last
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C. From the center of one weld increment to the center of the next
Pitch is the center-to-center spacing of the weld increments. Treating it as the clear gap between welds makes the unwelded spaces too long by one weld length.
Reference: AWS A2.4, Standard Symbols for Welding, Brazing, and Nondestructive Examination: intermittent welds, pitch
An intermittent fillet weld is dimensioned 50-125 on a metric drawing (millimetres). What is the clear unwelded space between adjacent increments?
Answer in mm.
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75 mm
Pitch is center to center, so the clear space is pitch minus increment length: 125 mm - 50 mm = 75 mm.
Reference: AWS A2.4, Standard Symbols for Welding, Brazing, and Nondestructive Examination: intermittent welds, length and pitch