I'm using STAAD.Pro V8i SelectSeries5 to code check an aluminum structure. The help file states "STAAD.Pro is capable of performing aluminum member design based on the ASD 1994 Specifications for Aluminum Structures, Sixth Edition (October, 1994)". It's surprising to see such a prestigious design package stuck in 90s. The latest version is 2015 and there are several revisions between 1994 and 2015.
I got the code check result and it is based on Eq. 4.4-1 / 4.4-2. However, when I manually checked against these two formulas in 2005 revision, the utilization ratio doesn't match up. I wonder whether the formulas in 1994 revision is different. Could someone provide these formulas from 1994 revision please? Many thanks.