Rebar Hoops

[05dtaylor]

I'm work for a precast concrete manufacturer. I'm drawing up some production plans for full-depth post-tension deck panels. The post-tensioning runs through 3" Dia PVC Ducts(3.5" O.D.) that will be cast-in of course. At the End Panels the engineer has specified that there be these #4 rebar hoops that encircle the ducts (as jacking reinforcement I'm assuming). I through together a drawing real quick to show my issue (Conceptual view doesn't show the 4-#5 Bars that run along the PVC inside of the ring but elevation view does). You'll see the interference issues that will happen. Any ideas/solutions that I should go to the engineer with? Hopefully I am clear enough.

Thanks for any help

 

[hokie66]

As I said before, too much conduit, too little concrete. Classic case of the tail wagging the dog.

 

[05dtaylor]

I did bring up the issue with the engineer but it was just dismissed and swept away. In any case, if these start cracking, it'll be on the engineers. There's an independent QA firm for this job making sure everything is done "correctly".

 

[dik]

Very little concrete in what could be a higher shear area. I'd expect cracks to follow the tubing. Might consider adding a strip of WWF to provide a bit of extra reinforcing.

Dik