Discussion
Assertion (A): A fitting factor is applied in addition to the ultimate factor of safety.
Reason (R): Load distribution within a fitting is less predictable than in a simple member.
Select the correct answer from the options below.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the justification. A simple member in tension carries a load that can be calculated with confidence; a fitting introduces eccentricities, uneven fastener load sharing, local bending and stress concentrations that the analysis represents only approximately. The fitting factor of about 1.15 covers that additional uncertainty, and it multiplies a load that already includes the ultimate factor of 1.5.
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