Factor of Safety

Not Reviewed
Equation / Last modified by mike on 2015/07/29 07:16
`FoS = `
Factor of Safety
Variable Instructions Datatype
`"Strength of Material Structure""` Enter the strength of the material Decimal
Design Load Enter the design load Decimal
2 variables
MichaelBartmess.Factor of Safety

This equation computes the general case of the a Factor of Safety (FoS), an engineering term used to ensure design capacity exceeds actual loads.

The FoS can be defined as the ratio of absolute strength (structural capacity) to actual load.  The value of the FoS may also be specified by law or by  engineering standards. Since the ratio defines the limit beyond which the system will not fail, it is a measure of the reliability of a system's design.

The FoS essentially defines how much stronger the system is than it needs to be to support the intended load.

Generally systems are designed stronger than needed for normal use, with an intent for the safety factor to encompass emergency unexpected conditions.  The greater the FoS, the larger is the safety "cushion" between just supporting design stress and supporting emergency or unnatural forces.