Dear Mariog,

You understand my question very well.

As I mentioned in earlier post, TANK is not very user friendly and you have to decipher the input values in the end result. Another problem I have been facing is that the new software is not fully installed as during the trial run there were issues. The software works in "Design Mode" but crashes in "Analysis Mode". Hence even though I input 0.5625in as thickness and CA=0, the software calculates the required value which is 0.35in in this case and uses this value for all further calculations irrespective of the input. I am compelled to use a seemingly convoluted approach to establish my point. My dealer has apparently logged this issue with Coade and hopefully this will be sorted. I am also therefore not able fine tune, create a straight example and send file to Coade.Maybe I shall send my initial file today.

I would like to have your views on how to have Av=0. Here we generally have only Peak Ground Acceleration as input and at Purchaser's option Av may be nil or some other value.

Regards,