When CAESAR II designs spring hangers, two additional load cases are required. The letter H designates the hanger installation load (pre-load) that is always present in a spring hanger.
L1 |
W |
(HGR) *HS = Rigid |
L2 |
W+T1+P1 |
(HGR) *HS = Ignore |
L3 |
W+T1+P1+H |
(OPE) *HS = As Designed |
L4 |
W+P1+H |
(SUS) *HS = As Designed |
L5 |
L3-L4 |
(EXP) ** |
*HS is the hanger stiffness specified in the Static Analysis - Load Case Editor.
** Use the algebraic combination method in the Static Analysis - Load Case Editor.
When you use only predefined spring hangers, there is no need for the first two load cases. However, the letter H is still required in the operating and sustained load cases. Other hanger load cases are required when you use multiple load case design. In such instances, let CAESAR II recommend the load cases. You can then add or edit the non-hanger design load cases as necessary.