Surfside condo collapse disaster: Investigators provide possible causes [Video]

Federal investigators determining why a Florida condominium tower partially collapsed three years ago, killing 98 people, said Thursday there were many faulty support columns in the tenant garage that ran below it and the adjoining pool deck.Video above: Surfside Condo Collapse: Timeline of eventsNational Institute of Standards and Technology investigators told an advisory panel that tests show that some of the steel-reinforced concrete columns at Champlain Towers South were half the strength they should have been and were not up to construction standards in 1980 when the 12-story tower was built. The steel in some had become moderately to extremely corroded, weakening them further.Investigators have also confirmed eyewitness reports that the pool deck fell into the garage four to seven minutes before the beachside tower collapsed early on June 24, 2021, in the Miami suburb of Surfside. Thursday’s meeting was in Maryland and streamed online.Glenn Bell, one of the lead …