Steve DeMars wrote:

Poured a slab (7) years ago for a general purpose "shop". Not necessarily
woodworking. ...
It's 22' long by 20' wide. . . Can I operate a woodworking shop without
"everything on wheels in that amount of space. Would be like to build
bookcases, smoking stands, tables of all sizes & some cabinets. Do I need to
pour more slab?

....snip...

Will it fit and work or do I "need" more slab . . . . suggestions please . .
. I figure I get one shot at this . . .

If you can afford it, I'd make it bigger--particularly, longer. But to
decide, I'd suggest taking a plan and sketching out the equipment you
have and expect to get and lay them out w/ movable outlines, trying to
see how the operational characteristic would be...particularly pay
attention to outfeed areas and sufficient clearance for sheet goods,
etc.

Just be sure when you do build to provide adequate overhead height--a
minimum imo would be 10-ft overhead clearance...