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RE: QUESTION REGARDING 18B40 (LIGHT BEAM SECTION PROPERTIES)

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If it was built in 1970, it was a W18x40.  The engineer was probably an old timer.  The B was indicative of a Bethlehem beam. 
 
Check out the references:
http://www.slideruleera.net/miscellaneous.html

Regards, Harold Sprague


 
> Date: Thu, 8 Oct 2009 16:49:29 -0700
> From: katy6827(--nospam--at)cox.net
> To: seaint(--nospam--at)seaint.org
> Subject: QUESTION REGARDING 18B40 (LIGHT BEAM SECTION PROPERTIES)
>
> I have an existing structure built in 1970 and the structural drawing calls out a 18B40 beam section. My AISC Steel Manual 6th Edition does not have the beam section listed under the "light beam" section and neither does the WF section. I was not able to find it in the AISC Historic Shapes database either. When comparing other shapes it appears as if the section properties of a W18x40 would be similar.
>
> Does anyone know where I can find information on a 18B40 beam section?
>
> Thanks,
> Katy
>
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