Jorge A. Barzan was working on scaffolding suspended from the roof by cables when workers on the roof, not realizing he was there, adjusted the platform he was on. He was thrown from the platform, which also fell, and since Barzan's safety rope was attached to the falling platform, there was nothing preventing him from falling 80 feet to the floor.

Another worker fell 20 feet, but was stopped by his safety rope, which was attached to another part of the scaffolding.

En route to the hospital, Barzan went into cardiac arrest; he died at Western Medical Center in Santa Ana. According to the coroner, he died of multiple traumatic injuries.

The construction area was shut down while the California Division of Occupational Safety and Health investigated. A full investigation could take months.

The new Ren_e and Henry Segerstrom Concert Hall is scheduled to open in September 2006.