steelwise - AISC

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Safety factor and Ω The design method for allowable tension in a threaded fastener, as given in reference 5, results in a variable value of the actual safety factor S F against tensile rupture. That is, Ω usually does not equal S F. This is due to the simplification provided by use of the gross diameter A G and to the variable ratio A T /A G. S F

  Safety, Threaded, Cisa