Hi Shiny
At the time of erection/maintenance spring is kept under locked position.
So do the produce upward load.
In running plant when particular equipment is in standby position can take slightly more load. So nozzle load at wnc could be slightly more than allowable.

We should try to design the system in such a way so that it is safe in operating/sustain condition as well do not produce very serious effect in the system at WNC condition.


Regards

Habib