Author Topic: Phoenix-Mesa Gateway Airport Air Traffic Control Tower Tops Off with Prefab Cab  (Read 4555 times)

Offline KB4TEZ

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Over the course of a week, DPR Construction completed the erection of two prefabricated steel structures atop the newest air traffic control tower in Mesa, Arizona. After the initial 206,000-lb. lower “bulge” pick, the structure was topped off with the 110,000-lb. cab. The two critical crane picks signaled the topping off of the largest single project in Phoenix-Mesa Gateway Airport Authority (PMGAA) history.
The frame for the lower-level bulge is supported by the precast concrete shaft of the tower. To successfully place the first structure, steel rods set in the concrete base had to line up with tightly fitted holes in the steel base plates of the bulge. “Aligning anchor bolts with 100 tons of steel on the crane hook required careful coordination and collaboration between trade partners,” said DPR project manager, Geoffrey Minor. “All the pieces had to align perfectly.”

The project team and trade partners developed a quality control plan to ensure the successful alignment of the anchor bolts. The DPR virtual design and construction (VDC) team used shared templates, surveying and laser scanning to verify all dimensions and identify any deviations prior to hoisting the bulge structure. Both steel structures were prefabricated onsite.