Specialized Laborer means a qualified laborer employed at specialized labour work including the fabrication, erection, installation, dismantling, rehabilitation, salvaging, and/or demolition of all structures and/or appurtenances connected with pipeline construction including plain or reinforced concrete, pipe insulation, piles and pipe supports including underwater work coming within the jurisdiction of the Union. This classification does not encompass the operation of equipment under the jurisdiction of the Operating Engineers and does not encompass work done by other classifications in this Agreement.