The proposed assembly of hundreds of glass panels left "no room for mistakes" in the structural steel as-builts. This included a requirement to accurately capture any bowing and twisting of the steel in order to reduce potentially costly fabrication errors of the glass panels and construction project delays. Tim Egan reports, "I cannot foresee going back to the old way of handwritten field measurements [when we can achieve] accuracy of 1/10th of an inch at 900 feet ... with our scan data ..."
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