Floor clearance on rolling box.
Building a cart/box/whatever to hold metal parts boxes, 5 to be exact. These boxes will hold machine screws, nut, bolts, washers, etc from 0-80 to 3/4-10. Accordingly it will be a good size box, about 18" deep, 42" wide. and (approx) 50+ inches high, and quite heavy when loaded.
Which leads me to the question - it will ride on 4 - 4" casters which will be attached to angle iron at the ends of the box, allowing the box to sit between the casters instead of on top, but how far from the floor? Flat and level concrete floor would probably allow only an inch or two clearance, but rough uneven floors might not be so workable.
According to the design, it I put the casters under the box, it's 5-1/2" off the floor, and I'm trying to keep the height down so I don't need a step stool to see in the drawers. Good news is the individual drawers have lids and can be removed from the rack. So, what say, how much clearance?
Alexis de Tocqueville was a very smart man.