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RE: Oversize bolt holes

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See "July 1999 Steel Tips" 
For 3/4" dia. bolt use 5/16" oversize
    1 to 2" dia. use 1/2" oversize
    over 2" dia. use 1" oversize
Washers are required (weld washers if
transferring shear)

Mark Pemberton, P.E.
Sacramento, CA

-----Original Message-----
From: Steve Bigham [mailto:SBIGHAM(--nospam--at)braden.com]
Sent: Monday, June 18, 2001 3:09 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: Oversize bolt holes


Pages 4-130 and 4-131 discuss over sizing anchor bolt holes.  The AISC steel
design guide series 1 "Column Base Plates" suggests using an additional 1/4"
diameter over those given in the Manual and a heavy plate washer (5/16" to
1/2") is used.

-----Original Message-----
From: Nicholas Blackburn [mailto:nblackburn(--nospam--at)fdgoak.com]
Sent: Monday, June 18, 2001 4:49 PM
To: 'seaint(--nospam--at)seaint.org'
Subject: Oversize bolt holes


Can anyone direct me to the section of the AISC 9th ed. that discusses
limits for oversizing bolt holes.  I looked at J3 and Table J3.1 and the
commentary but was unable to find any indication as to the allowable amount
that a hole/slot may be oversized (diameter/width and length), just that
they may be oversized at column bases.

Thanks

Nick Blackburn

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