AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A CWI is reviewing a blueprint for a structural assembly. The welding symbol includes a resistance spot weld symbol with the number '5' placed above it. Below the resistance spot weld symbol, the number '2500' is indicated in parentheses. What does the number '2500' represent?
- AThe minimum shear strength per spot in pounds.
- BThe minimum tensile strength per spot in pounds.
- CThe number of spot welds per unit length.
- DThe diameter of the spot weld in millimeters.
Show answer & explanationAnswer & explanation
Correct answer: A. The minimum shear strength per spot in pounds.
For resistance spot welds, a number in parentheses below the weld symbol indicates the minimum acceptable shear strength in pounds per spot. The number '5' above the symbol would typically indicate the number of spot welds.
Why the other options are wrong
- B. While related, the primary specification in parentheses for spot welds is shear strength, not tensile strength.
- C. The number of spot welds is usually placed above the symbol, not in parentheses below.
- D. Diameter is usually specified explicitly or derived from strength requirement.
Spot Weld Shear Strength
For resistance spot welds, the number placed in parentheses below the weld symbol specifies the minimum acceptable shear strength per spot in pounds.
- Parentheses below symbol = shear strength.
- Units are typically pounds.
- Crucial for evaluating weld quality.
Memory trick: Spot strength in parentheses, like a secret power number.