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Dear Abid, this is not a platform where others can review your project in detail. If you have a specific question please bring forward and we would be delighted to help you for that.

Abid, T can be calculated from both the methods and can be used in static analysis. Thanks.

I hope this snap shot will clear all the confusions.....

Yes, Tb is calculated by computer based on stiffness of building. The book you are referring to clearly explains what are you are asking. 1. Choose method of analysis: Static or Dynamic? A. Static Calculate Ta Calculate base shear V based on Ta Calculate Drifts based on Ta 2. Dynamic Calculate Ta Calculate Tb For base shear V, use Tb but Tb should not be more than 1.4Ta (or 1.3) For drifts disregard the upper limit and just use Tb without 1.3/1.4 limit. Hope that clarifies.