Writing in a recent issue of Civil Engineering magazine, professor Carl Shermer of Michigan State University makes some interesting observations concerning the destructive potentialities of corroded reinforcement in concrete beams. The beams were installed in 1947 to support the roof of lumber drying kilns at the Brunseick, Balke, and Collender Company at Muskegon, Michigan. Under the warm, moist conditions of the kilns and with no protection for the reinforcement except that of the concrete itself, steel corrosion advanced rapidly enough to cause structural failure in 1955 under the dead load alone. The reason the professor gives is that there was not enough concrete over the reinforcing steel to protect it from exposure to air and moisture. Professor Shermer emphasizes the importance of providing good protection for reinforcement steel in damp locations. He suggests that this can be accomplished by one or more of the following methods: (1) use of good quality concrete; (2) maintenance of a sufficient distance between the steel and the exposed concrete surfaces; and (3) use of water proofing applied to the concrete. Also, whether you're site casting or precasting, DON'T throw water into your concrete to make it easier to handle; the results are almost unfailingly bad.