Controls how the software handles spring hangers. If you select True, the software places the designed spring stiffness into the Hanger Operating Travel Case and iterates until the system balances. This iteration scheme therefore considers the effect of the spring hanger stiffness on the thermal growth of the system (vertical travel of the spring). If this option is used, it is very important that the hanger load in the cold case (in the physical system) be adjusted to match the reported hanger cold load.
If you select False, spring hangers are designed the traditional way.