Champlain Towers

Extracted Attributes

• Injuries

  11 injuries

• Location

  Surfside, Florida, United States

• Event Type

  Structural engineering failure and building collapse

• Fatalities

  98 deaths

• Primary Causes

  Degradation of reinforced concrete in basement parking garage, water penetration, steel corrosion, and structural design defects

• Historical Ranking

  Third-deadliest non-deliberate structural engineering failure in U.S. history

• Structure Involved

  Champlain Towers South (12 stories, 136 residential units)

• Building Completion Year

  1981

Timeline

• Champlain Towers South is completed in Surfside, Florida, as a 12-story residential condominium complex. (Source: Structure Magazine)

  1981-01-01

• An engineering report identifies major structural damage and degradation in the reinforced concrete slab beneath the pool deck and parking garage. (Source: Wikipedia)

  2018-10-08

• Building association notices emphasize that the structural degradation in the garage and pool deck has worsened significantly. (Source: Wikipedia)

  2021-04-09

• Two structural connections between garage columns and the pool deck fail, initiating load redistribution. (Source: NIST Releases Technical Findings)

  2021-06-01

• Champlain Towers South suffers a catastrophic partial collapse at approximately 1:22 a.m. EDT, killing 98 people. (Source: Wikipedia)

  2021-06-24

• The remaining intact structure of Champlain Towers South is demolished via controlled demolition ahead of Tropical Storm Elsa. (Source: Wikipedia)

  2021-07-04

• NIST releases its comprehensive technical findings detailing the sequence and root causes of the structural failure. (Source: NIST Releases Technical Findings)

  2026-06-01

Surfside condominium collapse

On June 24, 2021, at approximately 1:22 a.m. EDT, Champlain Towers South, a 12-story beachfront condominium in the Miami suburb of Surfside, Florida, United States, partially collapsed, causing the deaths of 98 people. Four people were rescued from the rubble, but one of them died of injuries shortly after arriving at the hospital. Eleven others were injured. Approximately 35 were rescued the same day from the intact portion of the building, which was demolished ten days later. A contributing factor under investigation was long-term degradation of reinforced concrete structural support in the basement-level parking garage under the pool deck, due to water penetration and corrosion of the reinforcing steel. The problems had been reported in 2018 and noted as "much worse" in April 2021. A $15 million program of remedial works had been approved before the collapse, but the main structural work had not started. Other possible factors considered included land subsidence, insufficient reinforcing steel, and corruption during construction. In June 2026, the National Institute of Standards and Technology (NIST) released their technical findings on what caused the partial collapse. The team concluded the collapse began in early June 2021, when two connections between garage columns and the pool deck failed. This led to the catastrophic collapse of the building on June 24, 2021, when two of the supporting columns in the middle part of the tower failed. The Champlain Towers South collapse ties with the Knickerbocker Theatre collapse as the third-deadliest non-deliberate structural engineering failure in United States history, behind collapse of the Pemberton Mill and the Hyatt Regency walkway collapse.

Web Search Results

• The collapse of Champlain Towers

  On June 24, 2021, Champlain Towers South, a 12-floor condominium building in Surfside, Florida, suddenly collapsed, killing 98 people. The collapse captured the nation’s attention because it was so sudden and deadly. Things like this are not supposed to happen. Perfect Storm. A number of factors contributed to the tragedy. Among them were construction defects, the boards’ failure to properly fund reserves, deferred maintenance, and a succession of boards’ refusal to impose special assessments to make needed repairs. [...] ## Board Negligence Negligent boards and deferred maintenance are not unique to Champlain Towers. Boards that defer maintenance inevitably result in large special assessments for members. Before the collapse of Champlain Towers, the Foundation for Community Association Research surveyed associations nationwide about deferred maintenance. The majority of issues reported by those who responded to our survey were water intrusion in windows and siding, deteriorating balconies, failing plumbing, electrical problems, and failing roofs. The study resulted in the publication of “Breaking Point: Examining Aging Infrastructure in Community Associations.”

• Surfside condominium collapse

  On June 24, 2021, at approximately 1:22 a.m. EDT, Champlain Towers South, a 12-story beachfront condominium in the Miami suburb of Surfside, Florida, United States, partially collapsed, causing the deaths of 98 people. Four people were rescued from the rubble, but one of them died of injuries shortly after arriving at the hospital. Eleven others were injured. Approximately 35 were rescued the same day from the intact portion of the building, which was demolished ten days later. [...] ## Background [edit] in the town of Surfside, just north of Miami Beach, Florida. Champlain Towers South (completed in 1981) was part of a three-building complex along with Champlain Towers North (completed in 1982) and Champlain Towers East (built between the North and South buildings in 1994). All three were L-shaped structures with 12 stories, but as of 2021, the South building contained the most units at 136, including a rooftop penthouse. Units varied in size from 1,200 to 4,500 ft2 (110 to 420 m2) and from one to four bedrooms. The penthouse was a controversial part of Champlain Towers South's design, as an exemption was needed to exceed Surfside's height limit. The penthouses were also not part of the original building permits. [...] On July 4, authorities announced that the still-standing western portion of Champlain Towers South would be demolished by Controlled Demolition, Inc. between 10:00 p.m. EDT Sunday night and 3:00 a.m. EDT Monday morning, after accelerating planning and placement of explosives in the building's foundation to complete the demolition prior to the arrival of Hurricane Elsa (then a tropical storm). The controlled demolition was expected to cause the standing structure to collapse mostly into the existing footprint of the building, with debris outside that perimeter expected to fall on the west (Collins Avenue) side to avoid disturbing the existing search and rescue zone on the east. The search for survivors of the initial collapse was set to resume almost immediately after the demolition was

• The Champlain Towers South Collapse: A Forensic ...

  The tragic collapse of Champlain Towers South (CTS), which claimed 98 lives on June 24, 2021, in Surfside, Florida, stands as one of the most devastating structural failures in U.S. history. Champlain Towers South was a 12-story reinforced concrete flat plate structure completed in 1981. The building featured 136 units, a lobby-level and basement garage, and a pool deck terrace on the south side. The South Florida Building Code (1979) and ACI 318-77 applied during the design and construction phases. [...] About the Authors Matthew Fadden, Ph.D, PE, is Associate Principal, Wiss, Janney, Elstner Associates, Inc., Ft. Lauderdale, FL, specializing in failure investigations, structural analysis, and repair design. His work includes high-profile failure investigations, such as the Champlain Towers South collapse, advanced finite element modeling and structural testing for evaluating reinforced concrete and steel structures. Fadden serves on AISC’s Committee on Specifications Task Committee 4 Member Design. Sedona Iodice, EI, is an Associate III at Wiss, Janney, Elstner Associates, Inc. (WJE). She holds a BS and ME degree in Civil Engineering from the University of Florida. Ms. Iodice joined WJE in 2022 and has contributed to numerous structural investigations and repairs.

• After the Collapse – Champlain Towers South’s Legacy

  ## A Short History Part of a three-building complex that ultimately would include Champlain Towers North and East, Champlain Towers South opened in 1981 in north-Miami Beach’s Surfside community. It represented the first major construction project in the area since the mid-1970s when Miami-Dade County imposed a construction moratorium barring new construction until necessary water and sewer infrastructure improvements were completed. Lacking appropriate funds and anxious to get development moving, town government, after some debate, accepted the Champlain developers’ offer to contribute $200,000 (roughly $750,000 in today’s dollars) toward those water and sewer improvements. With that, the moratorium lifted, and construction was soon underway. [...] Region: North America English Sudden in its occurrence and shocking in the human tragedies that unfolded in its aftermath, the June 2021 collapse of Champlain Towers South in the Miami suburb of Surfside, Florida, continues to send reverberations among residents and owners of high-rise condominium complexes everywhere, as well as among developers who pursue such projects, and insurance industry professionals who endeavor to protect stakeholders from catastrophic loss. As the victims, their families, and the community at large attempt to move forward, it’s instructive to examine what happened and why, the settlement and the legislative reforms that resulted, and the impact of the Champlain Towers disaster on the insurance industry. ## A Short History [...] Demand proved robust in a sleepy community known mostly for breathtaking ocean views and a strip of “mom and pop” motels. Maximizing revenue was paramount: The L‑shaped design shared by Champlain Towers South and its sister buildings enabled more units to be constructed with alluring ocean-front views while staying within Surfside’s 12‑story height limit.1 (Later, Champlain Towers South would be granted a variance to build a penthouse that exceeded that height limit.) Other amenities included saunas, valet parking and a heated pool; the pool would later reveal telltale clues as to the root causes of the collapse.2

• NIST Releases Technical Findings on What Caused the ...

  Today the National Institute of Standards and Technology’s National Construction Safety Team released its technical findings on the cause of the partial collapse of the Champlain Towers South building on June 24, 2021, which took the lives of 98 people. Following an extensive technical investigation, the team has concluded that the collapse began in early June 2021, when two connections between garage columns and the pool deck failed. These initial column failures caused cracks to grow and loads to redistribute in the pool deck over the next three weeks, resulting in the transfer of their loads to adjacent slab-column connections that were not strong enough to support them. This led to the larger catastrophic collapse on June 24. [...] Champlain Towers South was built in 1981 on the Atlantic coast in Surfside, Florida. It stood 12 stories high, plus a penthouse, and comprised three sections, which the NIST team refers to as the West, Middle and East parts. [...] Investigation co-leads Judith Mitrani-Reiser and Glenn Bell explain the findings in a video presentation released today"). The video includes a high-level introduction to the findings, followed by detailed technical explanations with visualizations, photographs and animations. NCST Champlain Towers South Investigation | Technical Findings (June 2026) “When building structures are designed and built to required codes and standards, they have margins against failure, meaning they should be able to support much more load than they are expected to bear,” said Mitrani-Reiser. “In the case of Champlain Towers South, however, these margins against failure were too narrow from the start.”