Example 1.2.1 Factor of Safety
Given: An iron bar of cross-sectional area, A=1 in2,
can support a force of P=36,000 lb in tension before it yields (starts
to permanently deform).
Req'd: If the Factor of Safety is 2.0 against yielding, what is the Allowable Load, Pallow (the maximum Working Load), that the bar can be subjected to?.
Sol'n:
Pallow = Pf/F.S. = (36,000 lb)/(2.0) = 18,000
lb
In service, the bar should not be loaded to more than Pallow = 18,000 lb.
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