[Shimpy]

Originally Posted by mulligan

Generally, there are 2 choices in reinforcement of building slabs in Florida. Steel mesh, usually 8x8 squares of welded #10 wire, with added 1/2 or 5/8 steel bar at the perimeter, or perimeter bars with fiberglass in the mix (sometimes called fibercrete). Both can be engineered to provide correct support and finished surface. This is really an oversimplification, but the general idea applies.

Thanks Mulligan, that answer my question. I knew the codes here were different than S Fla. due to different conditions, but that explains concrete to my satisfaction.