Seok,

friend.. before doing anything else, the advice of Sir John Luf(whom i think one of the commitee member)who's equally compettative like those person mention above, is enough or more for your concern. It works for me and I hope you'll try.

And I think your mis guided... So what sustain case for? To calculate loads??? ! Maybe its (OPE) rather than (SUS) for load calculation.

Answer given are not as bold as we will expect here, specially from our senior's advice.

Thank you.

Regards!