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Re: single-bolt steel connections

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On Jul 14, 2005, at 3:56 PM, Bruce Holcomb wrote:

Is there a place in the IBC code or AISC spec that specifically does NOT allow a connection with only one bolt?  We are being asked to change a welded connection detail to a bolted connection with one bolt.  In this specific case, the bolt is in tension.
There probably ought to be such a prohibition if there isn't already. This detail is a fatigue failure waiting to happen: The bolt loses a little preload in service under several cycles of tension; additional load cycles aggravate the loass of preload and the fastener either comes loose or fails in fatigue. In either case the connection is lost.
Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)

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