I am on my way back to the hospital to spend the night with my father-in-law but thought that I'd stop and ask a question. Today, I was looking out of the fourth floor window and noticed that there were lightning rods...points about 10 feet apart all around the perimeter of the second floor; Also tied into the loop were all of the roof mount hood fan covers with a very large gage wire. It all was tied EVEN to the metal dome roof drains. Down the hall I looked out the window there and no grounding/bonding at all. I've never done a hospital. Why the difference? I have to leave now so I'll look in later.