NIST investigation of Champlain Towers South collapse indicates no sinkhole

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.

On January 15, 2023, Phase 1 of the Kempegowda International Airport’s Terminal 2, in Bengaluru, India, began domestic operations. The 2.75 million-sf building, designed by Skidmore, Owings & Merrill (SOM), is projected to process 25 million passengers annually, while providing its travelers with a healthier environment, thanks to extensive indoor-outdoor landscaping that offers serenity to what is normally a frenzied experience.

Resiliency | Apr 18, 2023

AI-simulated hurricanes could aid in designing more resilient buildings

Researchers at the National Institute of Standards and Technology (NIST) have devised a new method of digitally simulating hurricanes in an effort to create more resilient buildings. A recent study asserts that the simulations can accurately represent the trajectory and wind speeds of a collection of actual storms.

USGBC and IWBI unveil streamlined certification pathway for LEED and WELL. Photo by Scott Webb

Green | Apr 18, 2023

USGBC and IWBI unveil streamlined certification pathway for LEED and WELL green building programs

The U.S. Green Building Council, Green Business Certification Inc., and the International WELL Building Institute released a streamlined process for projects pursuing certifications for the LEED green building rating system and the WELL Building Standard. The new protocol simplifies documentation for projects that are pursuing both certifications at the same time or that have already earned one certification and are looking to add the other.

K-12 Schools | Apr 18, 2023

ASHRAE offers indoor air quality guide for schools

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has released a guide for educators, administrators, and school districts on indoor air quality. The guide can be used as a tool to discuss options to improve indoor air quality based on existing HVAC equipment, regional objectives, and available funding.

Data Centers | Apr 14, 2023

JLL's data center outlook: Cloud computing, AI driving exponential growth for data center industry

According to JLL’s new Global Data Center Outlook, the mass adoption of cloud computing and artificial intelligence (AI) is driving exponential growth for the data center industry, with hyperscale and edge computing leading investor demand.