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RE: FRP Reinforcement

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We’ve had to use this material for several projects due to screw ups in the field.


The design is done by the supplier and based on every set of calcs I’ve seen, is

Based on simple “mechanics of materials” principles.




David L. Fisher SE PE

Senior Principal


Fisher and Partners

372 West Ontario

Suite 301

Chicago 60654


312.622.0409 (m)


312.573.1726 (f)



-----Original Message-----
From: Timothy Hilton [mailto:thilton(--nospam--at)]
Sent: Tuesday, July 28, 2009 3:59 PM
To: seaint(--nospam--at)
Subject: FRP Reinforcement


When reinforcing an existing concrete beam with FRP, do we just design for a brittle failure since it doesn’t yield?  I know ACI has a document but I don’t have it and I want to confirm that designing the reinforcing is a matter of simple mechanics, as with normal steel reinforcing.  Is there anything I’m missing?


I just need enough to explain to our client how we want to do it.    


Timothy K. Hilton, E.I.

Engineering Intern



P.O. Box 10567

1015 Wade Avenue

Raleigh, NC 27605-0567


919.832.5587 x 20