I've moved into a place that has a large (24 x 50) pole barn on the
property. I've started the process of converting it into an enclosed
building and I intend to set up my shop in it. I have discovered that
the existing concrete slab is not at all flat and is out of level by
about 2 inches over a span of about 20 feet.

My previous shop was in a basement, also on concrete slab, also out of
level and not flat. It was a niusance having to fiddle with roller
stands and other temporary supports to compensate for it as was
necessary when I moved them. Other than that, I never really noticed the
flaw in the floor.

I'm considering putting a plywood floor on top of the slab anyway, just
so I don't have to stand on concrete. Would it be worth the trouble to
raise that floor on sleepers and shim them so the floor is level? Can
such a structure be made stiff enough to work well under heavy
machinery?

TIA.

--
Art Greenberg
artg at eclipse dot net