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Factors of Safety
Factors of Safety - FOS - are important in engineering design
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Typical overall Factors of Safety - FOS's - are indicated below:
| Equipment |
Factor of Safety - FOS- |
| Aircraft components | 1.5 - 2.5 |
| Engine components | 6 - 8 |
| Heavy duty shafting | 10 - 12 |
| Lifting equipment - hooks .. | 8 - 9 |
| Pressure vessels | 5 - 6 |
| Turbine components - static | 6 - 8 |
| Turbine components - rotating | 2 - 3 |
| Structural steelwork in buildings | 4 - 6 |
| Structural steelwork in bridges | 5 - 7 |
| Wire ropes | 8 - 9 |
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