Design parameters of SEISMIC as per Section 12 of IS 800 in Staad pro.

Question

Dear sir, 
 When we design steel structures using Indian standard IS 800, If Design parameters of SEISMIC as per Section 12 of IS 800 will be checked as follows: 
 At the same time, Response spectrum analysis had already been performed in model. 
 
 But after Run Analysis, some warning and note indicated in Output as follows: 
 
 We don't understand why software mentioned Seismic definition unavailable? can you supply some solution to eliminate these warning and note in Output? 
 
 Regards 
 LYN

Abhisek M · Accepted Answer

Please refer response in the below link. 
 https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/235080/seismic-parameter-setting-for-is1893-part4

Abhisek M · Answer

Hello, 
 As per implementation logic, the seismic definition is required. But if you do not provide any seismic definition, the program will consider the default values and will show notes indicating what values the program is using. If you are okay with that, then you do not need to do anything. But if you want to use some other value, please use seismic definition.

Design parameters of SEISMIC as per Section 12 of IS 800 in Staad pro.

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