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RE: Post-Installed Threaded Insert

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We use coupling nuts installed on bolts embedded in the concrete.  The embedded bolt goes halfway into the coupler (a blind center thread is good for assuring this) and the open end of the coupler is bolted to the face of the form.  The forms and bolt holding the coupler to the forms are removed, and viola, a female thread awaits penetration with an external bolt on the face of the concrete.


Bob Garner, S.E.


From: Gerard Madden, SE [mailto:gmse4603(--nospam--at)]
Sent: Wednesday, March 11, 2009 9:28 AM
To: seaint(--nospam--at)
Subject: Post-Installed Threaded Insert


Anyone out there know of a post-installed concrete insert that has internal threads that would allow for an all-thread rod to be threaded in?

Similar to a ferrule or burke insert only it's drilled in to existing concrete?