I'm a big fan of concrete aprons. When your trying to move something on wheel dollies, or a floor jack for that matter, bricks or gravel can be a pain. With an apron, you can roll it far enough out of the shop for the tow guy to get to it. At my buddies desert shop, I always have to deal with a 4-6" drop from his shop door to desert sand. Makes it a pain to get things in and out of the door opening from the back of a pickup truck. I keep threatening to come by and make him a 10' concrete apron!
