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Miami Skyscraper Collapse: 24-hour rescue operations continue while federal teams prepare for investigation

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Miami’s first responders and support agencies search on Friday night at the site of a collapsed high-rise condominium in Surfside, Florida, as a federal team of experts deploying from Maryland and preparing to inspect the site. I was doing rescue operations.

The number hasn’t changed since Friday morning, when Miami-Dade County officials raised the death toll to four and said 159 were unexplained after the collapse of the Champlain Towers South Building early Thursday morning.

Only one victim died, and 54-year-old Stacie Fang was pulled alive from the rubble by a rescuer in a dramatic video shot on-site.

The skyscraper was built in 1981 and was scheduled for the first 40 years of inspection under local regulations.

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Investigations into the collapse have barely begun, but people are beginning to speculate on what led to the tragedy.

According to Glenn Corbett, a former member of the Federal Advisory Board of the National Construction Safety Team and a fire engineer at John Jay University, the federal investigation into the cause will be conducted by investigators at the National Institute of Standards and Technology. It is highly possible. Criminal justice in New York.

Rescue workers will search the rubble of Champlain Towers South Condo on Friday, June 25, 2021 in Surfside, Florida. The seaside condominium tower collapsed on Thursday.
(AP photo / Gerald Herbert)

He likened NIST to the National Transportation Safety Board (NTSB). This committee handles the investigation of airplane-train collisions, with the exception of buildings and infrastructure.

Dr. Albert M. Brigley, a structural and geotechnical expert at the Florida Institute of Technology, teaches a course investigating the 1981 Harbor Kay collapse and Hyatt Regency passage collapse at Cocoa Beach.

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In such cases, a combination of design and construction errors caused the collapse during or shortly after construction.

“The surfside collapse is very different in that the building was okay for about 40 years before the collapse,” he said.

Dr. Brigley also outlined some possible causes, but reiterated that it was too early to know for sure.

“Part of the foundation may have settled at different rates, which can cause stress in the structure,” he said. “Concrete may have cracked over time and then slowly expanded like a windshield crack.”

A 2020 land and sea level survey conducted by Dr. Shimon Wdowinski of Florida International University examined the Champlain Towers site and determined that it sank 1-3 mm annually in the 1990s. It could have accelerated and slowed in the decades that followed, he explained this week. Or it may have continued unevenly. Still, in other cities, there are significant subsidences without suffering from collapsed buildings, the FIU pointed out in a new study.

“When measuring land subsidence, or when looking at building movements, it’s worth checking why it happens,” Wdowinski said. “I don’t know why from satellite imagery, but I can say that there was movement here.”

Rescue workers look through the wreckage of a 12-story seaside condominium building on Thursday, June 24, 2021 in the surfside area of ​​Miami. (AP photo / LynnSladky)

According to Brigley, metal parts may have corroded or rusted after prolonged exposure to salty sea air or water.

“The building may have been exposed to an unexpected load or combination of loads that overloads the structural elements, and the structural elements may have been inadvertently damaged by the renovation or repair of the building.”[Andrenovationsorrepairstothebuildingcouldhaveinadvertentlydamagedstructuralelements”[Andrenovationsorrepairstothebuildingcouldhaveinadvertentlydamagedstructuralelements”

Corbett said it may not be known until NIST’s investigation is complete if there is a threat to nearby buildings or similar skyscrapers above and below the east coast.

“They are the federal government’s technical capabilities in investigating, determining why the building collapsed, and making suggestions for the future,” he said.

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Investigations may look for obvious movements or subsidence of buildings, opening of sinkholes, utility water, and potential weakening factors that can sneak up on sea water, as well as other factors.

NIST has confirmed with Fox News that it is preparing to send a team of six scientists and engineers to Miami.

They are tasked with collecting preliminary direct data used to determine if a complete investigation or study is justified.

The team will not enter the site until the search and rescue operation is complete and the area is considered safe.

“When a complete investigation or investigation is carried out, the ultimate goal is to identify the technical cause of the collapse and, if necessary, change building codes, standards and practices, or the structural safety of the building. It is to recommend other appropriate measures to improve. “

NIST was created under the National Institute of Standards and Technology Act following the September 11, 2001 terrorist attacks.

Former NCST adviser Corbett said rescue missions are expected to last at least overnight and may continue throughout the weekend, as long as first responders expect survivors to remain. It was.

“I see that my family is really angry that the pace of rescue isn’t as fast as I expected. That’s understandable,” he said. “But in reality, there are many problems with safety protocols … not only for rescuers, but also for those who may be trapped inside.”

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Bulldozers and cranes may help move the debris, he said, but it would put the survivors at greater risk of death.

“In this case, it’s not due to lack of resources,” he said. “There are more than 30 USAR teams nationwide.”

He mentioned FEMA’s Urban Search and Rescue Task Force, which has teams in several states, including Florida.

He also said that Task Force One in Sunshine is one of the best task forces in the country to respond to earthquakes, hurricanes and other disasters throughout the region in the Caribbean and South America.

“These people in Miami have a lot of expertise in this,” he said. “This is not their first rodeo.”

Miami Skyscraper Collapse: 24-hour rescue operations continue while federal teams prepare for investigation

Source link Miami Skyscraper Collapse: 24-hour rescue operations continue while federal teams prepare for investigation

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