An ironworker standing 30 feet in the air is safe wearing a full body harness that is not tied-off.?

No, an ironworker standing 30 feet in the air is not safe wearing a full body harness that is not tied-off. While the harness provides some level of protection, it only functions effectively when secured to an anchor point to prevent falls. Without being tied-off, the worker remains at risk of a serious injury or fatality if they slip or lose their balance. Safety protocols require that fall protection systems be properly utilized to ensure worker safety.