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
| Aug 19, 2022
Cuningham appoints Jacqueline Dompe as new Chief Executive Officer
Cuningham, a national design firm, is thrilled to announce the appointment of Jacqueline Dompe as the firm’s Chief Executive Officer (CEO).
| Aug 19, 2022
Future sea rise could expose 720,000 more people on East Coast to flooding
An analysis by NPR based on modeling from the National Hurricane Center for New York City, Washington, D.C., and Miami-Dade County found future sea rise could expose about 720,000 more people to damaging floods later this century.
| Aug 19, 2022
Manassas Museum renovated to reimagine a civic design & engage the community
Manassas, VA has recently added to its historic Manassas Museum.
| Aug 18, 2022
U.S. Treasury moves to boost affordable housing
The Department of the Treasury recently announced new guidance to “increase the ability of state, local, and tribal governments to use American Rescue Plan (ARP) funds to boost the supply of affordable housing in their communities,” according to a news release.
| Aug 18, 2022
The Illinois Institute of Technology restores three Mies van der Rohe buildings
With Dirk Denison Architects and Gilbane Building Company, the Illinois Institute of Technology has recently completed a $70 million housing project that has restored three Ludwig Mies van der Rohe buildings.
Multifamily Housing | Aug 17, 2022
California strip mall goes multifamily residential
Tiny Tim Plaza started out as a gas station and a dozen or so stores. Now it’s a thriving mixed-use community, minus the gas station.
| Aug 17, 2022
Focusing on building envelope design and commissioning
Building envelope design is constantly evolving as new products and assemblies are developed.
| Aug 17, 2022
New York to deploy 30,000 window-sized electric heat pumps in city-owned apartments
New York officials recently announced the state and the city will invest $70 million to roll out 30,000 window-sized electric heat pumps in city-owned apartments.
| Aug 17, 2022
IBM’s former office buildings in Boca Raton turn into a modern tech campus
Built in 1968, the Boca Raton Innovation Campus (BRiC), at 1.7 million square feet, is the largest office campus in Florida.
| Aug 16, 2022
DOE funds 18 projects developing tech to enable buildings to store carbon
The Department of Energy announced $39 million in awards for 18 projects that are developing technologies to transform buildings into net carbon storage structures.