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Re: ASTM For Headed Anchor Bolts

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A jamb nut or double nut is just another piece that is not really needed if you have the threads punched. If you do double nut or use a jamb nut, you need to tension / torque the jamb nut enough to cause local thread deformation if you want to prevent nut rotation. I just prefer punching the threads. It is quick and easy.

Regards,
Harold Sprague




From: "M. David Finley, P.E." <pec(--nospam--at)isgroup.net>
Reply-To: <seaint(--nospam--at)seaint.org>
To: <seaint(--nospam--at)seaint.org>
Subject: Re: ASTM For Headed Anchor Bolts
Date: Tue, 19 Oct 2004 15:43:12 -0400

How about just double nuts at the bottom?  This elininates the need to
mechanically deform the threads.

David Finley



----- Original Message -----
From: "Harold Sprague" <spraguehope(--nospam--at)hotmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, October 19, 2004 1:43 PM
Subject: RE: ASTM For Headed Anchor Bolts


> Rich,
>
> This is not a problem.  Sometimes it takes a 2x4 between the eyes to
> persuade someone to use headed anchor bolts.
>
> The correct spec for all anchor bolts is ASTM F 1554.  There are many
tests
> that show that the hooked anchor bolts do not work reliably. The maximum
> length that you can get using an A 307 is about 8 inches.  Longer headed
> bolts than 8" will be "hot headed".  But hot heading is expensive for
small
> quantities like anchor bolts.
>
> The best way is to draw a detail with a rod threaded on each end with a
nut
> on the anchored end with the threads mechanically deformed.  They will
take
> a punch and drive it into the threads at the nut interface to "lock" the
nut
> to the bolt shaft to form the head. They can also use all-thread for the
> bolt shaft.  It saves the threading process.
>
> Regards,
> Harold Sprague
>
>
>
>
> >From: richard lewis <rlewistx(--nospam--at)juno.com>
> >Reply-To: <seaint(--nospam--at)seaint.org>
> >To: seaint(--nospam--at)seaint.org
> >Subject: ASTM For Headed Anchor Bolts
> >Date: Tue, 19 Oct 2004 12:33:01 -0500
> >
> >What is the correct ASTM for headed anchor bolts that are commonly
> >available.  I have been using A307.  Is that the right one for anchor
> >bolts?  Is this commonly available?  I'm trying to persuade some of my
> >contractor clients into using headed anchor bolts instead of the 'J'
> >bolts because the tension values are higher.  I have a job right now
> >where the 'J' bolts are "on the job" even though my details show headed
> >bolts and the contractor is telling me how difficult it is to get headed
> >bolts.  I would like to get headed bolts in the range of 12" to 16"
> >overall length if possible.
> >
> >Thanks.
> >
> >Rich
>
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