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The site of the Champlain Towers South partial collapse in Surfside, Florida
The site of the Champlain Towers South partial collapse in Surfside, Florida.
Credit: NIST

On June 24, 2021, Champlain Towers South, a 12-floor condominium in Surfside, Florida, partially collapsed at approximately 1:30 a.m. EDT. The collapse happened suddenly and has resulted in mass casualties.

On June 25, NIST began deploying a team of six scientists and engineers to collect firsthand information on the collapse. Since then, NIST experts have been working with federal, state and local authorities to identify and preserve materials and information that might be helpful in understanding why the collapse occurred.

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NIST encourages members of the public to submit any information, including video, photos or other documentation, that might help the investigation via the NIST Disaster Data Portal

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Media

NCST Champlain Towers South Investigation | Technical Findings (June 2026)
NCST Champlain Towers South Investigation | Technical Findings (June 2026)
This video outlines the National Construction Safety Team's technical findings on what caused the partial collapse of the Champlain Towers South building on June 24, 2021. Investigative co-leads, Judith Mitrani-Reiser and Glenn Bell, explain how the team concluded that the collapse began in early June, when two connections between garage columns and the pool deck failed. They describe how the failure of these connections transferred their load to other structural elements that were not strong enough to support them due to problems that stemmed from the original design and construction of the building. Mitrani-Reiser and Bell explain that when the pool deck slab broke away from the building, it damaged two connections supporting that part of the tower that caused the failure to enter and spread throughout parts of the tower.

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Contacts

Created June 30, 2021, Updated June 22, 2026
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