A construction worker was killed after falling off a 20-foot building.

Killed was:Llewelyn Jones, 59, Spanish Fork.

The victim, a welder, was working on the roof of a building at the new Salt Lake County jail when he lost his footing and fell 20 feet to a concrete floor, where he landed on his head, said Salt Lake Fire Captain Bill Brass.

Paramedics responded, and Llewelyn was pronounced dead, Brass said. Nobody else was injured.