(Note: I originally posted this in the "Concrete Post-Tensioned Engineering" forum, but it doesn't seem like many folks actively look there, so I thought I'd post it here too.)

I am hoping to find some guidance on stage stressing of PT girders. I am designing a 38-foot girder which supports a column at midspan. The column supports two floors above that.

When is stage stressing necessary? When is it not?

In my office, the latest Post-Tensioning Manual we have is the 4th Edition from 1985. There is only about 3 pages of information out of the whole Manual on stage stressing and no design example. Any information would be appreciated. Thanks.