Lightweight Concrete Topping

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Lightweight Concrete Topping
SoftPlan Version:
2016 Plus

I'm designing a house right now that will use in floor radiant heating that requires

a 1-1/2" slurry of lightweight concrete on top of the Wood-I floor joist.

What is the best way to add this concrete so that it shows in Section ?'s picture
Concrete Topping

OK I was informed that I could add it as another floor system.   For some reason I was thinking that

if I added concrete I would lose the wood floor. However if I was thinking I would have reasoned that

having the ability to give Levels to floors would mean you could use multiple floors which I've done

before but only with other levels of wood floors, not a concrete floor ontop of a wood floor.  Anyway

all is well now.