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safety factor[′sāf·tē ‚fak·tər]
The amount of load, above the normal operating rating, that a device can handle without failure.
Increase in range or elevation that must be set on a gun so that friendly troops, over whose heads fire is to be delivered, will not be endangered.
Overload factor in design to ensure safe operation.
factor of safety, safety factor
1. The ratio of the ultimate stress of a structure or pressure vessel to the design working stress.
2. The ratio of the ultimate breaking strength of a member or piece of material or equipment to the actual working stress or safe load when in use.
The ratio of the maximum load a structure is designed to withstand to the maximum load it will be subjected to during a normal operating regime.