A roof collapse in San Francisco's Dogpatch neighborhood sent four construction workers to area hospitals with serious injuries, according to reports.
The four workers were pouring concrete on the roof of a six-story building under construction at 19th and Illinois Streets shortly before 8 a.m., according to the San Francisco Appeal online newspaper. The roof collapsed onto three workers who were on a stairwell on the sixth floor, causing them to fall three stories down.
Rescuers found them conscious but severely injured, covered in not-yet-dried concrete. The impact is akin to "having a large wall fall on you," according to a fire department official.
The fourth worker was hospitalized with minor injuries after attempting to help the three workers who had fallen, according to the newspaper.
The workers are all men in their early 20s to late 30s, according to San Francisco General Hospital.
The men were working on the Potrero Launch, a mixed-use development with 196 units slated to be completed next year.