The newly constructed bridge at "Florida global university" collapsed last Thursday killing six people and crushing eight cars underneath. The eight-lane segment of the Tamiami Trail below remained open during the testing.
As the massive, 53 metre (174-foot) concrete slab came crashing down, a auto swerved into Hepburn, sending him airborne, according to the suit.
It's still unknown what exactly caused the $14.2 million bridge to collapse. The remains of five victims had been removed from the scene; a sixth died at the hospital.
Many of their vehicles were flattened and left unrecognizable.
Morgan said they filed the lawsuit against FIGG Bridge Engineers, who designed the walkway, Munilla Construction Management, the firm that constructed it, and several others involved in the project.
The pedestrian bridge, designed by FIGG Engineering-Bridge Group and built by MCM Construction, was created to straddle 8th Street and connect the campus to the nearby Sweetwater neighborhood, where thousands of students live. FIU is not listed as a defendant in the lawsuit.
He is suing for damages in excess of US$15,000.
A FIGG engineer "concluded there were no safety concerns and the crack did not compromise the structural integrity of the bridge", the university said in a statement.
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On Friday, NTSB investigator Robert Accetta said work crews were applying post-tensioning force on the bridge support cables when the span fell down, but investigators aren't sure if that's what caused the bridge to fall. Cracks in concrete structures, he added, is normal. But as Newsy previously reported, an engineer noticed cracking in the span just days before it crumbled.
MCM was sued earlier this month for alleged faulty construction of a bridge built at Fort Lauderdale-Hollywood International Airport.
An accelerated construction method was supposed to reduce risks to workers and pedestrians and minimize traffic disruption, the university said.
"The investigation is ongoing to determine the collapse of the bridge, and FIU is fully cooperating with all authorities to understand what happened". This meeting was attended by representatives for FIU and FDOT.
Brownfield, 39, was a married father of three and a crane technician who was driving beneath the bridge when it buckled.
Lawyers representing Hepburn will hold a 1 p.m. press conference in Orlando on Monday to further discuss the case.
Officials said 8th Street remains closed as an investigation into the collapse continues.
"We are of the opinion that this tragedy was foreseeable and could have been prevented", he said.