37 Building construction for utility, industrial, commercial, governmental, public works, public accommodation, and infrastructure facilities, structures, and plants; installation, maintenance, repair, renovation and replacement services of machinery for utility, industrial, commercial, governmental, public works, public accommodation, and infrastructure facilities, structures, plants, and equipment; building inspection and construction project supervisory services in connection with the foregoing; building demolition services; Electrical contractor services for high, medium, and low voltage electrical; Construction, installation, maintenance, repair, renovation, and replacement of voice, data, video, fiber, life safety, security and network communications systems; Plumbing and pipe fitting services and HVAC contractor services; Millwrighting services and rigging services in the nature of installation of equipment to lift, roll, or move objects; Ironwork and structural steel construction services; Environmental chambers and low temperature refrigeration construction services; Retrofitting modifications and upgrades in the nature of renovation of existing industrial plants; civil construction services, namely, foundations and new building