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I admit to being lazy and do not want to learn a new code. This maybe why I 
prefer the ASD approach to steel design. The other possibility is I am very 
concerned about the service loading on buildings, tanks and equipment 
foundations. This dictates an ASD analysis. I believe the best approach would 
be to do two analysis. The first a service loading to determine deflection and 
natural periods. This would insure structural systems would work for day to day 
operations. Then a LFRD analysis would be preformed to insure ductility and 
reliability in the event of a catastrophic event. This would allow us to go 
into the inelastic region to insure the structure does not collapse. Now all I 
need to do is get my boss to cut my work load in half.
     What do you say Phil?

Acie Chance