] [Thread] [Date] [Author]

["Joseph R. Grill" <jrgrill(--nospam--at)cableone.net>]

I'm sorry, I was not clear, but as Conrad pointed out it is the J as used as
the torsional constant and the approximate equation he sent is what I was
looking for and what I also found after some searching through my storage in
the garage.  It was also in my older Salmon and Johnson text.
Thanks
Joe

-----Original Message-----
From: Liaquat Ally Akhand [mailto:laakhand(--nospam--at)gmail.com] 
Sent: Monday, November 23, 2009 5:30 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: "J" For Lateral Torsional Buckling equations

Dear,

"J" is the polar moment of inertia.

It is the square root of summation of square of moment of inertia
about "x-axis" and "y-axis".

You can find it in any standard Handbook.

Regards,



On Tue, Nov 24, 2009 at 6:52 AM, Joseph R. Grill <jrgrill(--nospam--at)cableone.net>
wrote:
> I have a small ?T? section that will be a fabricated section.  I?m a bit
> embarrassed, but I can?t seem to remember how to calculate the ?J? for a
> section (always been able to pull the value from the tables).  It is
needed
> for Lateral Torsional buckling equations for a tee section in the 13th
> edition of the AISC.  Can anyone out there help me out.
>
>
>
> Thanks,
>
> Joe
>
>
>
>

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