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
| Apr 20, 2012
Century-old courthouse renovated for Delaware law firm offices
To account for future expansion, Francis Cauffman developed a plan to accommodate the addition of an 8-story tower to the building.
| Apr 20, 2012
RCMA and Oak Ridge National Laboratory to host International Roof Coatings Conference
The International Roof Coatings Conference will feature keynote speakers Marc LaFrance of the U.S. Department of Energy, and Art Rosenfeld of the Lawrence Berkeley National Laboratory.
| Apr 20, 2012
Shawmut completes Yard House Restaurant in Boston
12,000-sf restaurant marks new addition to Boston’s Fenway neighborhood.
| Apr 20, 2012
Registration open for Solar Power International 2012 in Orlando
President Bill Clinton to deliver keynote address at ?largest solar energy event in the Americas.
| Apr 19, 2012
The 10 mistakes most likely to get you sued
The California Chamber of Commerce has produced a white paper cataloging the top 10 mistakes most likely to get a company sued. While a few of the laws cited apply specifically to California, some of them are federal and may apply in your state.
| Apr 19, 2012
Holcim cement plants recognized at PCA Spring Meeting
The Holly Hill plant received the PCA’s Chairman’s Safety Performance Award in recognition of their exceptional health and safety programs. The Theodore plant received the Environmental Performance Award in recognition of the steps they take beyond those required by laws, regulations and permits to minimize their impact on the environment.
| Apr 19, 2012
KTGY Group’s Arista Uptown Apartments in Broomfield, Colo. completed
First of eight buildings highlights unique amenities.
| Apr 19, 2012
Nauset begins work on $20M Joint Forces HQ at Hanscom AFB
3D imaging key to project timetable and cost containment.
| Apr 19, 2012
HBD Construction names Steven Meeks vice president
Meeks will provide expertise for the company in its many diverse areas of construction projects including health care, senior living, education and retail.
| Apr 18, 2012
Lafarge moving North American headquarters to Illinois
Lafarge CEO John Stull says the factors in their decision were location in the Midwest and area transportation.
