The proof load is the maximum load (force) that a bolt can withstand without acquiring a...

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The proof load is the maximum load (force) that a bolt can withstand without acquiring a permanent set. When no bolt grade or specification is available, the proof load for a bolt with yield strength S, and area of threaded portion (4) is: (a) 0.75 x A x S, (b)0.85 x A x Sy (c) 0.90 x A x S, (d) 0.95 x A Sy The proof load is the maximum load (force) that a bolt can withstand without acquiring a permanent set. When no bolt grade or specification is available, the proof load for a bolt with yield strength S, and area of threaded portion (4) is: (a) 0.75 x A x S, (b)0.85 x A x Sy (c) 0.90 x A x S, (d) 0.95 x A Sy