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RE: W Shape Field Cope

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Steel is cut with a torch all the time, so that is likely not a concern. More important I think is to evaluate the cutting that was done from the standpoint of the cut surfaces and corners of the cuts. If they are rough with sharp notches and corners, this may be a problem, particularly at the tension flange. There is info on acceptable edge conditions here:

 

    www.aisc.org/faq

 

See in particular FAQs 2.2.4 to 2.2.8.

 

Hope this helps.

 

Charlie

 


From: CanitzCF(--nospam--at)aol.com [mailto:CanitzCF(--nospam--at)aol.com]
Sent: Wednesday, May 05, 2004 6:09 PM
To: seaint(--nospam--at)seaint.org
Subject: W Shape Field Cope

 

A steel fabricator has a situation where he is required by the project SEOR to certify that a simple span W14x90 beam has not become structurally deficient due to his field crew removing 2"x3" notches from the top and bottom flanges along its length at 16"o.c. The notches occur at only one side of the web and occurred via torch cutting.

I determined the modified member's geometric properties and it's still OK (the CD's required only a W14x53). The SEOR is concerned about the high temperature required to remove the notches from the 3/4" thick flanges. The beam's sweep and camber are within AISC spec tolerances.

Since no distortion is visible, can that be considered sufficient evidence that the beam (A 992) is still adequate or is lab testing of a coupon required? Are in-situ tests available that would apply in this situation?

TIA,
Charles Canitz
Annapolis, MD