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estimation of initial PT sections and stage stressing

estimation of initial PT sections and stage stressing

hi everyone I'm a fresh employee and I'm learning to become a post tension designer.I don't know too much about PT.what should be span/d ratio, b/d ratio of continuous PT beam.In a continuous pt beam&slab which part of the dead load should be balanced in edge spans and internal spans.and I studied about stage stressing.In our company there are only one page about it.I could not find design details and examples so if someone has experience in stage stressing design plz.In a span where the live load is much higher than the dead load ,at transfer, deflection is more than limit and I can't increase the section depth due to some reasons .What should I do?if I reduce the prestress force,the ultimate limit state can't be satisfied.

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