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RE: Torqued vs. unTorqued

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I do think the same way as Tom does, and ACI 318-08 Commentary RD.8 lightly addresses and implies torqued bolts are basically post-installed anchors.


Freeman Tang, S.E.

Gouvis Engineering.


From: Tom.Hunt(--nospam--at) [mailto:Tom.Hunt(--nospam--at)]
Sent: Friday, February 04, 2011 7:19 AM
To: seaint(--nospam--at)
Subject: Re: Torqued vs. unTorqued



I could be wrong here but I always considered torqued bolts as post installed expansion type anchor bolts that require torquing in order to "set" which causes additional outward stresses at the head mechanism.

Thomas Hunt, S.E.

From:        Jordan Truesdell <jordan(--nospam--at)>
To:        seaint(--nospam--at)
Date:        02/03/2011 06:20 PM
Subject:        Torqued vs. unTorqued

Sorry to have been away so long guys...reading back I see much of the old gang still here. I ran into a question and couldn't find a definitive answer; I suspect someone here will know:

ACI 318 App D refers to untorqued vs torqued anchors. I have taken the stance that a torqued anchor is anything that will have torque applied to it during the installation process - i.e. everything except an embed like a headed stud welded to a plate.  A PEMB engineer I ran into claimed that only anchors torqued greater than snug tight are considered "torqued."  My version of ACI318 ('05) doesn't define either. Anyone have an article link that sorts this out?
Jordan Truesdell
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