High Strength Friction Grip (HSFG) bolts derive their shear capacity from:
Choose the correct answer
Shear strength of bolt shank in bearing
Clamping force (pretension) creating friction between connected surfaces
Weld connections at bolt ends
The hardness of the bolt material
Correct Answer
B. Clamping force (pretension) creating friction between connected surfaces
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HSFG bolts are pretensioned to a specified proof load (typically 70% of UTS). The resulting clamping force creates friction between contact surfaces, which resists slip. No slip occurs under service loads (serviceability limit).
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