public void BoltSlipCriticalSTDReturnsReducedSlipResistance()
 {
     BoltSlipCriticalGroupA bolt = new BoltSlipCriticalGroupA(0.75, BoltThreadCase.Included, BoltFayingSurfaceClass.ClassA,
     BoltHoleType.STD, BoltFillerCase.One, 1, null);
     double T_u = 72.0/8.0;
     double phiR_n = bolt.GetReducedSlipResistance(T_u);
     double refValue = 54.4/8.0; // from Design Examples
     double actualTolerance = EvaluateActualTolerance(phiR_n, refValue);
     Assert.LessOrEqual(actualTolerance, tolerance);
 }