How to put second wind grider

Dear Friends,

I am venkat from kuwait. While analysing the tank, i want to locate my second wind grider from the top of tank. I don't know how to feed data for second wind grider.

Kind inform me if there is any possiblities.

The second wind girder, if required, is automatically positioned by the software. You can't adjust this. You can only specify the distance down (from the top) for the top girder. This was provided because the top girder is often used to support a walkway near roof.