FoundryMusic.Com Media: Failed Building Implosion in South Dakota

failed building implosion in south dakota

December 3, 2005 - The 202-foot Zip Feed Mill tower, the tallest building in Sioux Falls, South Dakota, and possibly the state, was scheduled to topple at 12:55 p.m. on December 3, 2005 to make way for office and retail space. The concrete tower fell into its own basement, leaning to one side but still standing. Demolition crews had attempted to drop the structure by cutting reinforcing bars throughout the structure, then placing explosive charges in a ring around the base and up between the vertical silos. Unfortunately, the integrity of the structure was such that as the base was sheered off, the main structure dropped straight down, crashing through the damaged base into the lower chambers (i.e. the basement). A review of the demolition project proved that the crew had seriously underestimated the amount of cutting explosive required to "break" the structure's vertical integrity. A crane and wrecking ball were used to complete the demolition for the next two weeks.

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12/3/2005

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