Responsibilities: Structure Maintainers - Group C, under supervision, perform ironwork on subway, surface and elevated structures, including stations, enclosures and related buildings; perform other structural work as necessary including incidental painting; perform shoring, welding, burning, rigging, high-strength bolting and rivet removal on steel columns, girders, stairways, gratings and station controls; perform electric welding, brazing, acetylene cutting, and sheet metal work on bodies of multiple-unit railcars, including repair and alteration of framing, sheeting and other railcar body components; load, unload and drive trucks and vans; and perform related work. Some of the physical activities performed by Structure Maintainers - Group C and environmental conditions they experience are: working on or near tracks where live high-voltage equipment is present, climbing and descending ladders, working on elevated structures at heights of up to 160 feet and in confined spaces, working on suspended scaffolding, reaching into dark spaces and making tactile inspections, walking along trackways and catwalks in dimly lit areas, hearing and responding to warning whistles and sounds of oncoming trains, crawling under subway cars in maintenance pits, working outdoors in all weather conditions, and operating heavy machinery.