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# RE: Single angle bending member

• To: seaint(--nospam--at)seaint.org
• Subject: RE: Single angle bending member
• From: "jrgrill(--nospam--at)cableone.net" <jrgrill(--nospam--at)cableone.net>
• Date: Tue, 21 Nov 2006 15:59:07 -0700

Thanks Gunnar,

I was actually being a little lazy hoping someone had a list of Iw and Iz.  The formulas on page 17-42 of the manual would be for an angle constructed of plates (no fillets or radius at the toes), so I was hoping there was a tabel somewhere that could be had, so itterative calculations for a beam would be a bit simplified.

Joe

On Tue Nov 21 17:41 , 'Gunnar H. Isleifsson' sent:

You can find Iz and rz from the following equations:

Ix + Iy = Iw + Iz

rz = sqrt(Iz/A)

where
Ix and Iy are moments of inertia about major and minor geometrical axis
Iw and Iz are moments of inertia about major and minor principal axis

HTH
Gunnar Hafsteinn Isleifsson
Denmark

From: jrgrill(--nospam--at)cableone.net [mailto:jrgrill(--nospam--at)cableone.net]
Sent: 21 November 2006 23:21
To: seaint(--nospam--at)seaint.org
Subject: Single angle bending member

I am looking at the design of an unequal leg angle in bending using the new 13th edition of the AISC manual.  In section F.10 I need values for Iz and rz for the unequal leg angle to find Me.  Are these values listed somewhere I am not familier with.  I think I can calculate it from the diagram on page 17-42 but I would rather not make any mistakes.  If I have to is that the correct formula (O.k. maybe a dumb question for someone that has supposed to be educated).  If someone has a list of the values for angles I would love to get a copy, or can anyone tell me where to find the values.

Thanks,

Joe Grill, PE

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