Our recently bought used warehouse shelving has as many as ten racks worth of storage space. This is very useful because of the amount of items we have to store. All the boxes filled with old items that we no longer use need to be stored away, and the used warehouse shelving we bought is perfect. Unfortunately because of the amount of storage space the shelves have, we have to use ladders to reach the highest "racks" in order to get something stored up there.