ASCE 7-02

[picasa]

I am looking at compress calcs for a vertical vessel. Wind calcs are done per ASCE 7-02.

Compress calculates vessel OD = 3.3958' which is 3" higher than the actual vessel OD of 3.1458'. I guess the extra 3" is to account for nozzle projections, ladder etc. How does compress determine this number 3"? What is the formula?

 

[picasa]

Also how does it determine n1 which is the building natural frequency also called as fundamental frequency in compress.

 

[JStephen]

Could the 3" be insulation?

 

[picasa]

No. Vessel is not insulated.

 

[LSThill]

picasa (Mechanical)

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