Q: There are supposed to be three unity ratios reported in the Hydrostatic Collapse Check. Why in some cases is one of them missing?
REV 5.07

A: The code has three sections: hoop stress, tension, and compression. For some cases, there can be no tension (or compression). In other words, the axial load in the beam is such that the maximum normal stress (axial stress +- bending stress) is always of the same sign. In this case one of the checks cannot be made and we print no results.