ZZ axis section modulus for single angles

[Stazz]

This is driving me crazy, the section modulus for Axis ZZ in the AISC tables 1-7 for single angles seems wrong.

They appear to be using Iz/c to get Sz but the "c" that they are using is wrong.

From what I understand, these Axis ZZ values are for the minor principal axis which is the weaker of the 2 (having a lower moment of inertia). They are using the C from the major principal axis and dividing that into the Iz from the minor principal axis.

I've attached a quick calc for the first angle in the tables, am I doing something wrong?

 

[nutte]

Hmm, you're right, they're using the wrong c.

 

[WillisV]

This was updated in the last Spec errata.

 

[nutte]

It was, and I hadn't even noticed. Thanks for the heads up. (Although this is the Manual errata, not the Specification errata.)

http://www.aisc.org/content.aspx?id=2896

http://www.aisc.org/WorkArea/showcontent.aspx?id=4788