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RE: Welding across the flange?

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Did this factor play any role in the Northridge Disaster?  (I don't think so
but I'm interested in hearing from others!!)

-----Original Message-----
From: Dinmore, Gary [mailto:Dinmore(--nospam--at)]
Sent: Friday, February 23, 2001 10:00 AM
To: 'seaint(--nospam--at)'
Subject: RE: Welding across the flange?

The concerns of welding across a flange in general is to broad of a area for
generalization.  The penetration, loading, and stresses at and around the
weldment is necessary for proper evaluation.

Although, welding does not reduce the strength of a ductile steel such as
A36 (upon cooling down), it does change the metallurgical make up, resulting
in relative brittleness.

In contradiction to the aforesaid I offer the following , it may be a
fatigue issue (i.e. stress riser) generally speaking.

> -----Original Message-----
> From:	jwhitty(--nospam--at) [SMTP:jwhitty(--nospam--at)]
> Sent:	Friday, February 23, 2001 9:38 AM
> To:	seaint(--nospam--at)
> Subject:	Welding across the flange?
> Quick question....
> Problems with welding across the flange of a steel member?
> I know its done with moment connections  and when you do this with other
> materials such as aluminum you must take reductions in allowables.
> But with steel?  Why would an inspector caution against welding across a
> flange?
> Any thoughts would be appreciated.
> John Whitty, P.E.