Two engineers working on the renovation of the Rudolph Building — formerly the Art and Architecture building — were stranded 100 feet high on faulty scaffolding Thursday evening.

Around 5 p.m., as the two were examining one of the building’s walls, a cable that held the platform on which they were standing failed, leaving them dangling. City firefighters and the workers for the building contractor, Turner Construction, brought the two safely to the ground, according to Associated Press reports. Neither engineer was hurt, but according to the New Haven Register, they were taken to a hospital “as a precaution.”

According to WTNH, Rob Denny of Turner Construction said “safety precautions were all in place.”

“We practice these events with these gentleman and the fire lane access was available,” he said, according to the report. “Thank god everything went smoothly.”

The accident is currently under investigation, City Hall spokeswoman Jessica Mayorga wrote in an e-mail.