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Tall Signs

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I designed a tall  steel frame  (82')  for a sign company . The sign company
increased the height during construction by 20 feet. The design is not
adequate for the increased height  with the sign in place but the sign
company  said that they will take off the sign material ( thick cloth with
Print ) during storm signals.

The design is adequate for the bare frame.

May I have your opinion regarding this.