Virtually all of the studio conduits are going to be embedded in block walls, meaning that they are not going to move at all when the slab is poured. However, there are a few conduits that will come up in frame walls. And there are four 20A circuits that will come up below the console, from the floor. These all need to be locked down in cement before the slab is poured, lest they move around and miss their targets.
Here you can see what will be two of the four 20A circuits in its own little mound of cement:
More photos and details at the blog...
P.S.
Happy Thanksgiving to all!