To design a two-way PT slab, we usually design the tendons strip-by-strip in Adapt PT first and then export the tendons into Adapt Builder for analysis.
As suggested by Bijan, we should have the PT tendons balance 50% - 90% of the slab dead load in each direction. But the question is: For a two-way PT slab, if we have the banded tendons balance say 90% of the dead load in one direction and have the distributed tendons balance another 90% in the other direction, the slab may be overbalanced to 180% that will cause cracking at the slab top.
Does the above concern make sense? How much balance % shall I specify in Adapt PT when designing banded tendons and distributed tendons respectively? 45%?
-Eric Q. Wang, PE, MSCE