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Rigging Load Verification for the Final Show   

May 21, 2011
Rigging Load Verification for the Final Show

Thornton Tomasetti

Rigging Load Verification for the Final Show
Chicago, Ill.

We performed a study of the roof structure at Chicago’s United Center to support the proposed rigging which was to be used during the farewell show of one of our era’s leading talk show hosts. Thornton Tomasetti was the structural engineer of record for the design of the stadium, which was completed in 1994. From our analysis, we determined that the main roof structure could support the new rigging loads, which totaled approximately 270,000 lbs. Our analysis model was revised to include loading from the large screens, lights and speakers, which were to be suspended from the roof trusses and rigging steel. We followed with site visits to ensure that the rigging loads were located as assumed in our analysis. Our work helped the rigging crew, who worked around the clock and between Chicago Bulls games, to put up a set which was as memorable as the star-studded event for which it was created.