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[runkir]

Dear Sir/Ma'am,


It is good to see that introduction of a dedicated code for the design of tall buildings in India. This would definitely be a milestone towards the design of safer structures using the latest state of art technologies.
I have few queries in the IS 16700, which are listed below.

1. Deformation�limit (Section 5.4): The section recommends the use of 50 year return period for the service wind drift limit. I feel this bit conservative. International codes generally considers 10 years return period for the service drift limitation.�
2. Seismic Drift: The code does not provide any reference to convert the elastic displacement to the maximum inelastic response displacement. Does it mean that�whatever displacement is obtained for the seismic load combination shall be used for checking the drift limitation?�

Would appreciate your clarification on the above queries.


Thank you
Regards
Kiran

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