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RE: FRP Retrofit

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Things to consider when using FRP retrofit:
1)  The assembly needs to be fire proofed which will add additional weight.
2)  When used in areas with considerable temperature variations debonding will occur between the base concrete and the FRP.
Francis Hsi, PE
Highway Structures Maintenance Engineer

From: thilton(--nospam--at)
To: seaint(--nospam--at)
Subject: FRP Retrofit
Date: Tue, 9 Jun 2009 10:34:18 -0400

Can somebody point me to a good source of info for using FRP “strips” to reinforce existing concrete? 


Specifically I’m interested in strengthening an existing flat plate slab to add a new penthouse on top.  The addition will also require a large number of 12” to 14” square penetrations for new mechanical units.  I need some ballpark figures for a cost estimate ASAP.


I would appreciate any insight. 




Timothy K. Hilton, E.I.

Engineering Intern



P.O. Box 10567

1015 Wade Avenue

Raleigh, NC 27605-0567


919.832.5587 x 20



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