Originally Posted by
Jason Donaldson
The bulk of what makes a rack stable by bolting it down it that it's affixed to the surface on which you're standing. I suppose that, if you had one layer of 3/4" plywood at full width, with the second layer of plywood cut out in the middle to reduce the thickness on which you're standing, then that might work, if you fasten the second layer really well (with a lot of screws and maybe some Liquid Nails or similar adhesive). At that point, you're standing on the bare plywood. Stall mat would go over top of the plywood on the outside of the the "hole" you're considering.
But this is probably overthinking it. Any reason you can't make a regular 4x8 foot platform with two sheets of plywood with stall mat on top, then just press in front of the rack, from the bare floor? You don't really need safeties in place for that lift.