Factor of Safety

Factor of safety, abbreviated as FS, also called safety factor, a dimensionless number, is the ability of a system's structural capacity to be usable beyond it's expected or acrual loads.

 

factor of safety formula
\(\large{ FS = \frac {UTS}{R}  }\)
Symbol	English	Metric
\(\large{ FS }\) = factor of safety	\(\large{ dimensionless }\)
\(\large{ R }\) = applied stress	\(\large{ \frac{lbf}{in^2} }\)	\(\large{ Pa }\)
\(\large{ UTS }\) = ultimate tensile stress	\(\large{ \frac{lbf}{in^2} }\)	\(\large{ Pa }\)