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ZZ axis section modulus for single angles

ZZ axis section modulus for single angles

ZZ axis section modulus for single angles

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?

RE: ZZ axis section modulus for single angles

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

RE: ZZ axis section modulus for single angles

This was updated in the last Spec errata.   

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