Fillet weld angles more than 135 degrees should not be relied upon to transmit what?

Fillet weld angles more than 135 degrees should not be relied upon to transmit what?

• A. Any loads
• B. Calculated loads
• C. Tension
• D. Shear

Answer: (B)

When a fillet weld is formed with an included angle greater than 135 degrees, the weld’s effective throat (the minimum cross-section that actually resists the load) becomes much smaller and the load path through the weld becomes less predictable. Design methods for fillet welds assume a certain throat size and a steady, predictable transfer of forces. As the angle opens beyond 135 degrees, those assumptions break down, so you should not rely on such a weld to carry the calculated design loads. If the joint must carry the designed forces, revise the weld geometry or size to restore a reliable throat and use a more appropriate weld detail. The weld could still transfer some tension or shear in real life, but the calculated design loads aren’t reliably transmitted by this high-angle fillet.

When a fillet weld is formed with an included angle greater than 135 degrees, the weld’s effective throat (the minimum cross-section that actually resists the load) becomes much smaller and the load path through the weld becomes less predictable. Design methods for fillet welds assume a certain throat size and a steady, predictable transfer of forces. As the angle opens beyond 135 degrees, those assumptions break down, so you should not rely on such a weld to carry the calculated design loads. If the joint must carry the designed forces, revise the weld geometry or size to restore a reliable throat and use a more appropriate weld detail. The weld could still transfer some tension or shear in real life, but the calculated design loads aren’t reliably transmitted by this high-angle fillet.