I was at a "man cave" estate sale, and saw an apparently factory made (not homebuilt) hydraulic press mounted to the wall. (concrete block wall) It was a 20 ton, top was about 7ft from the ground, bottom was maybe 2ft from the ground, and about 15" from the wall. It was about the same size, strength, & design of other similar capacity presses, but did not reach the floor. No one there could explain why, as the old boy who owned the shop had passed. Speculation was it saved floor space. (not much) Didn't think to get a pic until much later, after the sale.
Strange.