Source: https://www.enr.com/, June 23, 2026
By: Bryan Gottlieb

The National Institute of Standards and Technology on June 22 released technical findings and further details regarding the events leading to the collapse of Champlain Towers South and the tragic deaths of 98 people that occurred five years ago.

The agency concluded that the collapse sequence began weeks before the building fell, when two slab-column connections beneath the Surfside, Fla., condominium’s pool deck experienced punching-shear failures, initiating a progressive sequence that culminated in the partial collapse of the 12-story reinforced-concrete tower on June 24, 2021. Read more.