I'd take pictures and with measurements.
Once sheeted, you might need to find a board to tie to or a raceway.

I did that on my library.

Martin

On 2/18/2016 4:41 PM, swalker wrote:

Moved last year to a place with no shop so I need to build one now
that most everything else is done. It will be concrete slab on grade.
I will use 2 X 4 sleepers on the concrete with plywood over the
sleepers.
My last shop was done this way and I liked being able to run airlines
and some wiring under the floor.
Somewhere I saw a picture of a shop with a plywood floor and the
plywood had 2 or 3 coats of poly on it.
Anyone on the list use this approach.

Jim