Because roll up doors lift up and out of the way, there's no worry about clearance for swinging doors to open. Your driver can back right up to a dock or squeeze down a tight alley and then open the door. And drivers can get to their loads fast, so the time saved on each delivery can really add up. Roll-up doors can be used for the side and rear loading of vans and trailers, the easy loading of containers and twins, and even for piggy-back operations.