Hi,

I am using ASCE 7 module of CAESAR for the first time (instead of API 2A).

I am doing this analysis for an offshore facility, where 10 m above mean sea level(where wind velocity is refered) is not same as elevation 10 m. 10 m above mean sea level is 35.8 m elevation in my case.

I see that there is an option in CAESARII to input 3sec gust wind speed @10 m elevation above ground.
But there is no option in CAESARII to key in reference elevation at which this 10 m occurs.

1. Is it not a requirement of ASCE7 to consider Velocity v/s elevation profile?

2.If no, please let me know how CII knows what velocity has to be calculated at which elevation.

Thanks in advance.

You can change the elevation of the model (the first node) in the Piping Input. Use the "Global" option on the "Edit" menu to do this.

You must set your CII global elevation to the distance that point is above mean sea level. It has nothing to do with your plant reference coordinate system, only the DISTANCE above mean sea level or distance above grade for onshore systems.

Thanks for quick help Mr. Richard and Mr. Bob.

I dont want to tamper elevations since I calculate various deflections using CAESARII coordinates and import/export displacements very frequently.

No Problem. I will calculate wind loads outside the software and load them as user defined wind pressure v/s elevation.

Thank you Gentlemen.