Pre-tensioning vs. moment capacity

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YL0101
Pre-tensioning vs. moment capacity

Hello Rick,

I have a simple span prestressed T girder bridge and working on the load rating for this bridge.
I noticed that the girder moment capacity is different from the Pre-tensioning, please see the attached file. I understand how the moment capacity is calculated, but don't know how the pre-tensioning came out. Is it the jacking forces? but the unit is kip-ft, not kips. Could you please me on that?

Thank you.
Yuan

AttachmentSize
PDF icon Pre-tensioning vs. moment.pdf84.93 KB