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RE: Oversize bolt holes

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Does anyone know the requirement for the washer thickness for oversize bolt holes if I used A-490 bolt and the steel is A-992 grade 50ksi.

  Mark Pemberton <Markp(--nospam--at)lbdg.com> wrote:

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


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