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The Hyatt Regency Walkway Collapse

The Hyatt Regency Walkway Collapse. Presented By: Jonathan Foster 4/9/02. An Engineering Disaster. Kansas City, Missouri - 1981. July 17, 1981. Approximately 2000 People Came for a Dance Competition At 7:05 pm a large crack was heard and two walkways collapsed

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The Hyatt Regency Walkway Collapse

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  1. The Hyatt Regency Walkway Collapse Presented By: Jonathan Foster 4/9/02

  2. An Engineering Disaster Kansas City, Missouri - 1981

  3. July 17, 1981 • Approximately 2000 People Came for a Dance Competition • At 7:05 pm a large crack was heard and two walkways collapsed • Leaving 114 Dead and Left over 200 injured

  4. Gillum-Colaco International Inc. (G.C.E. Inc.) Proposed Design for the Walkways • wide flange beams were to be used on either side of the walkway which was hung from a box beam • a clip angle was welded to the top of the box beam which connected to the flange beams with bolts • one end of the walkway was welded to a fixed plate while the other end was supported by a sliding bearing • each box beam of the walkway was supported by a washer and nut which was threaded onto the supporting rod

  5. Proposed Design

  6. The Revised Design • one end of each support rod was attached to the atrium’s roof cross beams • the bottom end went through the box beam where a washer and nut were threaded on • the second rod was attached to the box beam 4" from the first rod • additional rods suspended down to support the other levels in a similar manner

  7. Actual Design

  8. The Fourth Floor Connection

  9. Reasons For Disaster • Lack of Communication • Interpreting Preliminary Drawings as Finalized Drawing • Insufficient Review of the Final Design

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