Sometimes it’s easy to see what the problem is. This is the bottom of a reinforced concrete beam. All of the bottom cover has spalled off and exposed the fact that all of the bottom rebar is rusted. (The black streaks are the rusted bars – main reinforcing running up and down and ties running left to right.)


Fortunately someone else saw this before me and put in a shoring post before there was a bigger problem than ugliness.

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