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RE: hole in steel web

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AISC Steel Design Guide Series 2 is entitled "Steel and Composite Beams with
Web Openings" .  It gives procedures for designing un-reinforced and
reinforced holes through steel beams.

Roger Davis
SDS Architects, Inc
205 N. Dewey Street
Eau Claire, WI 54703
715-832-1605
rdavis(--nospam--at)sdsarch.com


-----Original Message-----
From:	Bart Kemper, P.E. (http://www.bigdogz.com/bart)
[mailto:bkemper(--nospam--at)bigdogz.com]
Sent:	Thursday, October 05, 2000 9:47 AM
To:	seaint(--nospam--at)seaint.org
Subject:	Re: hole in steel web



Francisco Duarte wrote:
>
> Does anyone have any info. concerning drilling a hole in a steel web.
> I have a W18X50 and the contractor wants to drill a hole 31/2 inches in
> diameter in tithe web.
> What should I be concert in this situation. Any info will be greatly
> appreciated.
> million thanks,
> F. Duarte, EIT.


The only answer I can give is more questions:
What is the loading on the beam?
What is the application?
What is the criticality?
WHY is the hole being drilled?
WHERE is the hole? Center of the web?  How close to the connection?
What is the connection?

If I couldn't "eyeball" it in as a non-critical feature (do I feel
comfortable enough to sign off by inspection), I'd probably knock out a
quick solid model of the beam, add in the hole, mesh it, apply the
loadings, run the FEA, and see what the stresses/deflections
are....about a half hour's work max, providing I could extract the
loadings easily.  Roarke's and other strength of material references
(more advance than the undergrad texts) can give you the methods for
doing it by hand.

Bart Kemper, PE