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Moment Connection Backer Bar Removal Requirements

Moment Connection Backer Bar Removal Requirements

(OP)
Is there a requirement that moment connection beam flange backer bars be removed?
If so, do the welds require a specific treatment or reinforcing?
The applicable general code for the project is IBC 2009 in the USA.
Any references on the topic would be helpful.

RE: Moment Connection Backer Bar Removal Requirements

Get your hands on a copy of AISC 358. You'll find very specific requirements there.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Moment Connection Backer Bar Removal Requirements

SMF or OMF?

RE: Moment Connection Backer Bar Removal Requirements

(OP)
KootK, It just came up so there's not time to order it right now.
Can you briefly summarize?

RE: Moment Connection Backer Bar Removal Requirements

Quote (Structural Ed)

KootK, It just came up so there's not time for that right now.

358

341

I'd have to reread it myself before summarizing to ensure that I got it right.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Moment Connection Backer Bar Removal Requirements

(OP)
sandman; OMF

RE: Moment Connection Backer Bar Removal Requirements

AISC 341 Chp. E, has three methods for designing an OMF connection, E1.6b(a), (b), or (c). Selection of option (c) would require an access hole per AWS D1.8 and welding of the beam to column to comply with chapter 3 of AISC 358. This chapter will require removal and reinforcing fillet welds. Selection of options (a) or (b) would not require AWS D1.8 access hole or backing removal and welding requirements.

RE: Moment Connection Backer Bar Removal Requirements

If you are the EOR and don't have a copy of those documents you shouldn't be designing steel moment frames. If you are not the EOR for the project you should ask the EOR for the welding requirements.

RE: Moment Connection Backer Bar Removal Requirements

(OP)
Thanks KootK and sandman21.

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