Hoop stress- New API650 11th - Earthquake check

[tngv752]

I try to check the hoop stress due to the earth quake based on the new API650 11th.

The equation E.6.1.4-4a have the terms "Cc" and "S" which are not included in the Notations.
Anyone know what they are ?

Thanks

 

[DSB123]

tngv752,
Do a search on this forum. This subject has been covered before.