Three construction workers were seriously injured after drying concrete fell on them, causing the trio to plunge three stories at a construction site in the Dogpatch neighborhood Wednesday morning.
The accident was reported shortly before 8 a.m. at a six-story building at 2235 Third St.
Fire Department Battalion Chief Charles Crane said the accident happened as workers were pouring concrete on the building’s roof.
The roof support structure gave way and collapsed, he said. The impact caused them to fall three stories.
Firefighters responded and found the three workers covered in concrete that had yet to harden, Crane said.
Crane said the weight of the concrete was “equivalent to having a large wall fall on you.”
The three were severely injured but were conscious when taken to San Francisco General Hospital, he said.
A fourth worker also was hospitalized after suffering minor injuries while trying to help the workers who fell, Crane said.
Hospital spokeswoman Rachael Kagan said the workers are all men in their early 20s to late 30s. Three are in serious condition and the fourth is in fair condition.
Industrial accidents are not uncommon in San Francisco. On Aug. 4, two window washers narrowly escaped injury after their scaffolding collapsed while they were 14 stories above Berry Street. In July 2010, a landscaper was temporarily buried alive after a retaining wall collapsed on him at a residence in the Sea Cliff
Wednesday’s work was being done on the site of the Potrero Launch project, a 196-unit mixed-use development slated to be completed next year. All four workers are employed by Nibbi Brothers General Contractors, a San Francisco-based company.
Patricia Ortiz, spokeswoman for the California Division of Occupational Safety and Health, which is investigating the incident, said the company had no history of safety violations in the state. She said investigations usually take two to four months.
The District Attorney’s Office also is investigating the accident to see if any criminal conduct occurred, which is standard procedure for such accidents, District Attorney George Gascón said.
Nibbi Brothers Chief Financial Officer Nick Fedick said in a statement Wednesday that the company has never been involved in an accident like this in its 60-year history, and he had no information on its cause.
“I cannot speculate as to the cause of the incident and I do not have enough information at this time to address any questions,” Fedick said.