The company he worked for, Ahern, was fined following five separate workplace accidents dating back to 2008, according to Cal OSHA records.
An investigation in 2011 was prompted by a complaint and turned up nine safety violations.
In 2008, a painter and employee of the company was pinned between the corner of a tractor trailer bed and a wall, putting him in the hospital for five days to treat a severe laceration to his leg.
The incident Friday happened amid construction for the Moscone Center’s expansion project, which will increase the center’s size from 1.2 million square feet to 1.5 million square feet.
