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Re: Greasing headed anchor rods (is it necessary?)

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yes it is preferably to transfer the load down to the anchor head. You could
use sleeve instead of grease to debond.
Regards
khopt

----- Original Message -----
From: "Clifford Schwinger" <clifford234(--nospam--at)yahoo.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Monday, April 14, 2003 11:18 PM
Subject: Greasing headed anchor rods (is it necessary?)


> When you have larger diameter headed anchor rods with
> deep embedments (4 feet), is it a good idea to grease
> straight shaft to de-bond the anchor rod from the
> concrete in order to get the bolt tension down to the
> base of the headed anchor where the real tensile load
> transfer into the concrete is assumed to occur?
>
> I am asking this for a condition where we have 1.5"
> diameter F1554 Grade 105 anchor rods that resist some
> pretty big tension forces from lateral loads.  Fatigue
> loading is not a consideration and we are not
> pre-tensioning the bolts.
>
> Is it necessary to grease the bolt shaft or is this
> just a waste of time - and grease?!
>
> Thanks in advance for any insight anyone wishes to
> share.
>
> Cliff Schwinger
>
>
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