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RE: Erection of Double-framed beam Connection to Columns

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With regards to the common bolt problem :

>>>1. Erection hazard due to common bolt
Longitudinal beams have common connection bolts at column webs. In this
case, we have to remove the bolts from the first beam connected for
connecting the second beams, in which erection hazard exists.<<<

Treat this seriously.  The new OSHA steel errection standard prohibits this
  type of detail.  You can get a copy of the OSHA standard from their web
site.

The Erector could possibly build some kind of a jig that   would allow one
beam to be safely held in place while the   other beam is positioned to
allow erection.

Mark Gilligan