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PT Beam Horizontal Construction Joint

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For the PT experts out there:  a contractor is asking if they can pour a 24" deep PT beam in two lifts.  The bottom 12" of the beam is in the slab and the top 12" is an upturn, so it does make sense from a constructability standpoint.  However, calculating the horizontal shear flow at mid-height is greatly complicated by the presence of PT.  There is also the issue of the dead and stressing ends being near the joint.

Any comments or advice?

Daniel Popp, S.E.