Workers returned to the Mariposa Hall jobsite Tuesday after a two-day strike over the union’s right to select workers for certain restricted jobs. About 25 workers walked off the site early Friday in support of picketing by members of the Operating Engineers Local No. 3, the union representing hoisting and portable elevator operators. The union protested McCarthy Construction’s use of an able-bodied worker to operate the temporary lift, a job union representatives said is historically reserved for union members who have physical restrictions. When picketers from the Operating Engineers arrived at 5:30 a.m., plumbers, electricians, carpenters and laborers walked off the jobsite in support of the action. “If there’s a harm against one, it’s a harm against all,” said Jim Murphy, president of the Sacramento-Sierra Building Trades Council, who sanctioned the strike in support of the engineers. The dispute was resolved Monday when McCarthy Building Companies agreed to employ a member of the union’s choice. “This was a jurisdictional dispute,” said Tom Sims, vice president of operations for the Sacramento-based general contractor. He said the company wasn’t aware of any dispute before the strike was called. “People who do our work usually develop health problems over time,” said Jay Bosley, the union’s assistant district representative. “Jobs like running the lifts are usually reserved for older workers who can’t do the rigors of regular construction. Among the 13 picketers Friday was Louis Costa, a 70-year-old union member who needs 86 hours on the job to qualify for retirement benefits. A neck injury left the Costa without full range of motion. “We like someone in Louis’ situation to be able to run that lift,” said Bosley, “This is about the economic well being of the more vulnerable.” Bosley said several companies constructing high-rise buildings in downtown Sacramento use workers who are older or with physical restrictions to operate the temporary elevators. “Historically that work goes to these folks.”