A 59-year-old I-4 Ultimate subcontractor was killed on the job Monday afternoon.

A steel stand being moved by an excavator came loose and fatally struck Curtis Popkey at about 2:30 p.m. in the area of Cranes Roost in Altamonte Springs, running parallel to eastbound Interstate 4, the construction company said.

"We are deeply saddened by this loss. Our focus now is to ensure that we support individuals and families affected by this tragic event," project leaders said in a released statement.

The federal Occupational Safety and Health Administration is investigating.