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Re: Decoupling of anchor bolts
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Decoupling of anchor bolts
- From: Jnapd(--nospam--at)aol.com
- Date: Tue, 29 Jan 2008 12:28:27 EST
What if lateral load is 5k or less............and 10k or less ?
n a message dated 1/29/2008 7:40:49 A.M. Pacific Standard Time,
large lateral thrust loads, I provide a steel setting template with shear
lugs welded to the bottom of the setting template. The anchor
bolt forces are resisted by bearing on the setting template.
Decoupling of anchor bolts
Date: Sat, 26 Jan 2008 08:47:43 -0600
have a late quick side question here. If you do not put shear in
anchor bolts, how do you specify and detail a connection for a
pre-engineered metal building? I’ve never seen a PEMB supplier
install shear lugs. Is there some other detail you would use in this
for your insight.
From: Harold Sprague
Sent: Sunday, January 20, 2008
Subject: RE: Decoupling of
Unless the shear
force is small, I do not resist shear with anchor bolts. Any time that
I have a significant tensile force in anchor bolts, I require them to be
pretensioned. And any time I have a pretensioned anchor bolt, I
require the shafts to be greased and taped to preclude bond.
Generally we do not account for the contribution in the
stretch of an anchor bolt to lateral drift or deflection of cantilevered
columns or braced frames. It can be significant. If you
pretension the anchor bolts you eliminate the stretch contribuition to drift
of the anchor bolt.
I have done this for buildings, power
plants, machine bases, etc.
Date: Sun, 20 Jan 2008 11:18:37 -0800
> Subject: RE: Decoupling of anchor bolts
> What applications do you do
this for? Just large bolts with little or no shear
> I have been thinking about
anchor bolts more than usual
> after following the list this past
> BTW, thanks to all who wrote about anchors etc.
Johnson & Nielsen Associates