24 Jun 202101:30 EDT
Turning point
Champlain Towers South partially collapses
NIST says the 12 floor condominium partially collapsed at approximately 1:30 a.m. EDT. NIST later said the collapse took the lives of 98 people.
Incident
How the Surfside condominium collapse unfolded
Early on June 24, 2021, much of the 12 story Champlain Towers South condominium in Surfside, Florida, collapsed, killing 98 people. NIST opened a National Construction Safety Team investigation and in June 2026 released technical findings tracing the collapse to failed slab to column connections under the pool deck. A Miami-Dade court approved a settlement of more than $1 billion for victims in June 2022, and Florida adopted new condominium inspection rules.
24 June 2021 to today · 21 dated events · 9 sources
Where it stands now · as of 31 October 2026
NIST released its technical findings in June 2026 and is writing a final report that will include recommendations for codes, standards and practices. NIST has not announced a date for the final report.
deaths98per NIST
victims settlement fund$1.02 billionapproved June 23, 2022
units in the building136per court settlement reporting
Overview · 24 Jun 2021 to 28 Sep 2026 · click a dot to jump
2021
25 Jun 2021
NIST sends a team to the site
NIST began deploying a team of six scientists and engineers to collect firsthand information.
30 Jun 2021
Turning point
NIST launches full investigation
NIST announced a full technical investigation under the National Construction Safety Team Act to determine the likely technical cause and recommend improvements to building codes and practices.
Jul 2021
Evidence tagged and removed
NIST says evidence was tagged, photographed and removed from the debris pile at the collapse site.
2022
Jan 2022
Evidence cataloged in warehouse
NIST says collected evidence was cataloged in a secure warehouse.
26 May 2022
Florida building safety law takes effect
SB 4-D took effect, requiring condominium and cooperative associations to have milestone inspections performed on certain buildings and revising rules on reserves and official records. It became Chapter 2022-269.
23 Jun 2022
Turning point
Judge approves victims settlement
Miami-Dade Circuit Judge Michael Hanzman approved a $1.02 billion fund for people who lost family members or were injured, drawn from 37 sources, with none of the parties admitting wrongdoing. About $96 million was set aside for owners of the 136 units.
2023
May 2023
Evidence moved to new warehouse
NIST moved the evidence to a new warehouse, with special handling for the most fragile pieces.
Jul 2023
Concrete and rebar cores tested
NIST photo captions show concrete and reinforcing steel cores collected from the evidence and prepared for compression and other tests from July through September 2023.
2024
Aug 2024
Water absorption tests on concrete
NIST says concrete samples were soaked in water in a test designed to measure how quickly water and the chemicals it carries are absorbed.
Nov 2024
Recovered hard drives found unreadable
NIST says 25 hard drives recovered from the site were too damaged to read.
2025
5 Feb 2025
NIST reports progress to Congress
NIST released a report to Congress with an update on the Champlain Towers South investigation.
11 Apr 2025
Team updates structural engineers
The investigation team presented an update to structural engineers.
23 Jun 2025
NIST releases video update
NIST released an extensive video update on the investigation.
Jun 2025
Full scale replicas tested to failure
NIST says full scale replicas of building components were built and tested to failure at the University of Minnesota and the University of Washington, with slab and connection tests shown in June 2025.
9 Sep 2025
Technical work nears completion
NIST said the Champlain Towers South investigation was nearing completion of its technical work.
2026
19 Mar 2026
Annual report to Congress
NIST submitted its annual report to Congress summarizing fiscal year 2025 progress on its construction safety investigations.
22 Jun 2026
Turning point
NIST releases technical findings
NIST said the collapse began in early June 2021 when two garage column to pool deck slab connections failed in punching shear, leading to the June 24 partial collapse. It said later modifications and corrosion diminished the margins against failure and ruled out vibrations from nearby construction and foundation failure.
“In the case of Champlain Towers South, however, these margins against failure were too narrow from the start.”Judith Mitrani-Reiser, NIST investigation co-lead, National Institute of Standards and Technology
13 Aug 2026
Advisory committee meeting announced
NIST announced a virtual meeting of the National Construction Safety Team Advisory Committee for September 23 and 24, 2026.
23 Sep 2026
Advisory committee briefed
At the two day meeting, co-lead Judith Mitrani-Reiser highlighted eyewitness accounts of building issues in the weeks, days and hours before the partial collapse that NIST says support its findings.
28 Sep 2026
NIST outlines recommendation topics
NIST said co-lead Glenn Bell presented potential recommendation topics including quality and design of construction, code enforcement and records retention policies, and building inspections. No date was given for the final report.
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Sources
9 records, ranked by type- 1Official record22 Jun 2026Champlain Towers South Collapse (NCST Investigation)National Institute of Standards and Technology · nist.gov
- 2Official record30 Jun 2021NIST Will Conduct Technical Investigation of Collapse of Champlain Towers SouthNational Institute of Standards and Technology · nist.gov
- 3Official record2021Champlain Towers South Collapse: BackgroundNational Institute of Standards and Technology · nist.gov
- 4Official record28 Sep 2026Champlain Towers South Collapse: News and UpdatesNational Institute of Standards and Technology · nist.gov
- 5Official record9 Sep 2025Champlain Towers South Collapse: News and Updates, page 2National Institute of Standards and Technology · nist.gov
- 6Official record22 Jun 2026NIST Releases Technical Findings on What Caused the 2021 Partial Collapse of Champlain Towers SouthNational Institute of Standards and Technology · nist.gov
- 7Official record28 Sep 2026NIST Provides Updates on National Construction Safety Team ActivitiesNational Institute of Standards and Technology · nist.gov
- 8Official record26 May 2022SB 4-D (2022D): Building SafetyThe Florida Senate · flsenate.gov
- 9Social media post23 Jun 2022Judge approves $1B+ deal in deadly Florida condo collapseAssociated Press via News4Jax · news4jax.com
Last updated 31 October 2026. Spotted an error? See corrections. Every event links to the record it comes from. Allegations are attributed to whoever made them.