Thanks Dragoneggs, It was by silly chance, we came up with this system. History: When the original green storage shed was built some 8 years ago, we had a club president at the time who didn't want it, so she threw up barriers as to why it wouldn't work and one of of these was, "someone will break into it and steal everything!". During all this, I was pondering the jump to get machines into a shed that's floor is 14" high without mounding gravel up to it. Then it struck me that a hinged ramp would do it PLUS it could be locked in the up position and cover the bottom 1/3 of the door from any character who'd like to break in. Hence the movable ramp was designed.
(do note, we've never had something stolen or broke into)