The ironworkers union was protesting because Rostov, a subcontractor doing metal work Monday for the high school addition project, does not use union workers, school district business administrator Peter Daquila said.
The union did not return to protest Tuesday. Daquila said it's possible they would return when more metal work is done at later stages in the project. There were no disruptions caused by the protest.
Contractors for the district are required to pay their workers the "prevailing wage" and the union would be able to review pay records, Daquila said.
The School District of the Chathams in August awarded a $3,495,000 contract to New Bruswick-based Tekton Development Corp to add seven classrooms at Chatham High School. Rostov is a Tekton subcontractor.Messages were left with Ironworkers Local 11.