wood floor joists on slab on ground

huangyhg

wood floor joists on slab on ground
has anyone seen this type of construction.  house in florida, built in 1986, has 2x8 floor joists siting on slab on ground.
any reason for this?  is this typical in this area?  does this type of framing have a name?
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i have seen this a number of times. some people prefer timber floors as they have a bit of give when you walk on them.
also you can run services under the floor boards
place to run utilities.  
they are called "sleeper" joists.
and if insulated, is warmer in winter to your tootsies than a slab.
don phillips
hopefully, they are pressure treated and the space is vented.
mike mccann
mccann engineering