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 I use both ASD and LRFD. All Offshore Structures are primarily designed 
by API RP 2A which is basically based on AISC with the exception of 
punching shear , Hydrostatic collapse, pile-soil-structure interaction 
etc. Traditionally API used ASD method . However new API codes are also 
available in LRFD. In Canada all the Building and offshore structural 
codes are based on LRFD method. I prefer ASD to LRFD where I can see 
things better. In general LRFD produces lighter structure because the 
load combinations are based on statistics i.e., unlike ASD the Dead , 
Live, Wind, Earthquake, Temperature do not occur simultaneously and hence 
reduced factors are used.

Amal K. De P.Eng.

On Mon, 8 Apr 1996 BRBATES(--nospam--at) wrote:

> Question for anyone who's interested:
> Are you using ASD or LRFD (or something else) for steel design, and why?
> Thanks,
> Bruce Bates
> RISA technologies
> ...