Quote:
Originally Posted by fimiak
It is topped out when the highest roof steel bar is installed. It has nothing to do with the progress of the structure as a whole. The steel installation itself isn't even finished, it simply has reached its top height. It is a tradition for ironworkers to paint the this steel bar white, and to sign it.
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Wrong. It represents the last main structural element which is usually also the highest. It is meant to signify the completion of the structure which this is not.