STAAD shear calculation error for AISC 360-10

Hi All,

I have noticed that STAAD incorrectly calculates the shear capacity for a member.

Specifically, it uses a VERY large shear area (overstated by a factor of 2!).

Here is the output for an Australian 250UC72.9:

INTERMEDIATE:         Aw:       Cv:          Kv:       h/tw:        Vn:
MAJOR(VZ):           7.454     1.000        1.200     8.944       194.597

The depth of a 250UC72.9 is 254 mm and the web thickness is 8.6 mm which yields an area of 2184 mm^2 (3.385 inch^2). STAAD uses 7.454 inch^2 which is 2.2 times larger, causing the final capacity to be similarly overstated.


Is this intended?  Has anyone else experienced this problem?