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TX I-Girder Top bars

TX I-Girder Top bars

TX I-Girder Top bars

(OP)
Tx prestressed Girder.
Contractor wants to replace the Top T-bars (4)- #4 bars on Tx40 girder with 1/2' diameter strands. Saying it helps on their production process. I did not see related Tx dot Documents to permit the replacement option.
Any Bridge Engineering has similar experiences? what you suggest or share your opinions.
thanks.
McGill

RE: TX I-Girder Top bars

Keep in mind a 1/2" diameter strand does not have the same cross-sectional area as a 1/2" diameter rebar.

I'd personally be against it regardless of whether it was the same area of steel.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/

RE: TX I-Girder Top bars

I would think a 1/2' diameter strand had a pretty big cross section, but maybe that's just me.

RE: TX I-Girder Top bars

Quote (10p)

I would think a 1/2' diameter strand had a pretty big cross section, but maybe that's just me.

Hah!

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/

RE: TX I-Girder Top bars

I've seen it done (presumably for the same purpose, prevent top flange cracking prior to service). So I wouldn't say it is crazy... But that may not be enough justification to permit it here.

----
The name is a long story -- just call me Lo.

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