Posted By newbostonconst on 07 Jan 2016 08:05 PM
In my experiance ICF manufactures don't have "structural guys". They are plants that make things out of foam.....they are "foam guys" They make lots of cups and containers.

You are likely talking about ICF's satellite manufacturing location... But if you call Nudura or Logix - they have structural engineers who should be able to help you out... Maybe some smaller ICF companies do not.. Be careful who you go with...

Here local the local inspector is going to make you follow what ever is on the drawings. It didn't jump ouot at me as being insufficient just a little different than we usually see. I like the tension/compression theory, that makes sense to me. It shows no cold joint on the sketch. It's stuff like this you hope are addressed at plan review rather than pour day.

You can't have tension strength without compression opposite to it.
Stirrups are to prevent the beam from splitting up the middle when the bar is loaded. Think of putting two 2x8 on edge and walking on them. It is not the bend the will fail, it is that the bottom centers move away from each other. As soon as you nail blocking between them they stiffen up and are safe to walk on.
I don't know where the idea that you can use C's rather then U's or full stirrups came from but you usually only see them in ICF details.