# Margin of Safety for a Failure Load

Written by Jerry Ratzlaff on . Posted in Safety Engineering

Margin of safety for a failure load, abbreviated as MS, a dimensionless number, is the ratio of the system's structural capacity to the requirements or how much excess capacity.

## Margin of Safety for a Failure Load Formula

 $$\large{ MS = \frac{ FL }{ DL \; DSF } }$$ (measure of required verification) $$\large{ MS = \frac{ FL }{ DL } \; -1 }$$ (measure of structural capacity)

### Where:

$$\large{ MS }$$ = margin of safety for a failure load

$$\large{ DL }$$ = design load

$$\large{ DSF }$$ = design safety factor

$$\large{ FS }$$ = factor of safety

$$\large{ FL }$$ = failure load

Tags: Equations for Safety