Roof air rising 1

[Marinel1]

I woukld like to know how to calculate the right pressure for roof air rising of a tank.
I have been involved in some but only as an observer. I would like to know if someone can help me on this issue.

 

[Syahar1975]

Good evening Lylebrown00 / Marinel1,

There is a checklist to ensure all procedures had been followed. Off Course back up blower and generator shall be available. The fuel in the generators and blower rotation direction shall be checked.

I have experience when the roof is raise about 1 foot we lowering down by opening the roof manhole wider. And the roof went down slowly.

But it would be different case if the roof already raised in half way.