minimum fillet weld size

[Lion06]

I've been trying to figure out what the minimum fillet weld size was changed from being based on the thickness of the thicker part joined to being based on the thickness of the thinner part joined. The commentary really only says that AWS has been doing it that way for years and AISC is just catching up. I've found a few articles that talk about the prevalence of low hydrogen electrodes, but again, nothing specific.
I sent an email to AISC regarding this a week ago and haven't gotten a response yet. Does anyone have any information on this or know of someplace I can read about it?

 

[frv]

StrEIT-

Several months ago this was addressed in an issue of MSC. I don't remember if it was a small article or one of the quiz questions. I don't recall the specifics, but have you tried a search on AISC website?

 

[Lion06]

I have that article. The only explanation it gives is the following: "This is a change from previous editions of the Specification, in which the minimum weld sizes were based off the thicker part joined."
They give no background on it at all, and I don't understand why.

 

[JAE]

There's a brief discussion in the AISC steel spec commentary - section J.2b, page 16.1-331 in the 13th edition manual.