Investigators from the National Institute of Standards and Technology (NIST) say they have found no evidence of underground voids on the site of the Champlain Towers South collapse, according to a new NIST report.
The team of investigators have studied the site’s subsurface conditions to determine if sinkholes or excessive settling of the pile foundations might have caused the collapse. They have found no such evidence to support that potential cause.
Preliminary evaluation of data indicates about one quarter of an inch or less of settling in the pile foundations supporting the pool deck structure and basement. This would have had minimal impact on the pool deck structure, NIST says.
“Understanding exactly what caused this collapse is taking meticulous investigation and the collection of copious amounts of evidence and information,” said Joannie Chin, director of NIST’s Engineering Laboratory. “Our team members are dedicated to unraveling the complexities of this tragic event, and their rigorous research and analysis will not only help us understand the likely technical cause of the collapse but will improve the safety of our communities.”
The team’s preliminary evaluation of physical and historical evidence found that the pool deck construction deviated from design requirements. Specifically, the number of slab reinforcing bars centered over vertical columns was inadequate, and the reinforcing bars in the top of the slab in the vicinity of the columns were spaced farther apart than the design required, according to investigators. These deviations weakened the slab-column connections, they said.
NIST expects technical work on the investigation to be substantially completed in late June 2024 and aims to release a report with findings and recommendations in late June 2025.
Related Stories
Affordable Housing | Apr 1, 2024
Biden Administration considers ways to influence local housing regulations
The Biden Administration is considering how to spur more affordable housing construction with strategies to influence reform of local housing regulations.
Affordable Housing | Apr 1, 2024
Chicago voters nix ‘mansion tax’ to fund efforts to reduce homelessness
Chicago voters in March rejected a proposed “mansion tax” that would have funded efforts to reduce homelessness in the city.
Office Buildings | Mar 27, 2024
A new Singapore office campus inaugurates the Jurong Innovation District, a business park located in a tropical rainforest
Surbana Jurong, an urban, infrastructure and managed services consulting firm, recently opened its new headquarters in Singapore. Surbana Jurong Campus inaugurates the Jurong Innovation District, a business park set in a tropical rainforest.
Cultural Facilities | Mar 27, 2024
Kansas City’s new Sobela Ocean Aquarium home to nearly 8,000 animals in 34 habitats
Kansas City’s new Sobela Ocean Aquarium is a world-class facility home to nearly 8,000 animals in 34 habitats ranging from small tanks to a giant 400,000-gallon shark tank.
Cultural Facilities | Mar 26, 2024
Renovation restores century-old Brooklyn Paramount Theater to its original use
The renovation of the iconic Brooklyn Paramount Theater restored the building to its original purpose as a movie theater and music performance venue. Long Island University had acquired the venue in the 1960s and repurposed it as the school’s basketball court.
Green | Mar 25, 2024
Zero-carbon multifamily development designed for transactive energy
Living EmPower House, which is set to be the first zero-carbon, replicable, and equitable multifamily development designed for transactive energy, recently was awarded a $9 million Next EPIC Grant Construction Loan from the State of California.
Museums | Mar 25, 2024
Chrysler Museum of Art’s newly expanded Perry Glass Studio will display the art of glassmaking
In Norfolk, Va., the Chrysler Museum of Art’s Perry Glass Studio, an educational facility for glassmaking, will open a new addition in May. That will be followed by a renovation of the existing building scheduled for completion in December.
Sustainability | Mar 21, 2024
World’s first TRUE-certified building project completed in California
GENESIS Marina, an expansive laboratory and office campus in Brisbane, Calif., is the world’s first Total Resource Use and Efficiency (TRUE)-certified construction endeavor. The certification recognizes projects that achieve outstanding levels of resource efficiency through waste reduction, reuse, and recycling practices.
Office Buildings | Mar 21, 2024
Corporate carbon reduction pledges will have big impact on office market
Corporate carbon reduction commitments will have a significant impact on office leasing over the next few years. Businesses that have pledged to reduce their organization’s impact on climate change must ensure their next lease allows them to show material progress on their goals, according to a report by JLL.
Adaptive Reuse | Mar 21, 2024
Massachusetts launches program to spur office-to-residential conversions statewide
Massachusetts Gov. Maura Healey recently launched a program to help cities across the state identify underused office buildings that are best suited for residential conversions.
