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PIPEFITTER CONTRACTOR (Also Pipefitter Master) <br />Those who are qualified to install piping for central air conditioning, refrigeration, and heating, <br />piping to boilers and unfired pressure vessel systems, lift station equipment and piping, insulation <br />for pipes, pressure and process piping, pneumatic control piping, piping to fuel tanks and pump <br />installations, installation of oil tanks, fire sprinkler systems and standpipes, air piping, vacuum line <br />piping, oxygen lines, nitrous oxide piping, ink and chemical lines, and condensate drain piping. <br />PIPEF=R JOURNEYMAN <br />Those who are qualified to perform pipefitting work while employed or supervised by a pipefitting <br />or mechanical contractor. <br />PLASTERING CONTRACTOR (Also Lath & Plaster, Plastering & Stucco) <br />Those who are qualified to coat surfaces with a mixture of sand or other aggregate gypsum plaster, <br />portland cement or quick -lime and water, or any combination of such material as to create a per- <br />manent surface coating. Such contractor may apply and affix gypsum or metal lath or any other <br />product prepared or manufactured, including the placing of metal studs and runners to which lath <br />is to be applied, to provide key or suction bases for the support of the plaster coating. <br />Those who are qualified to proportion and apply concrete to surfaces by pneumatic methods, chip <br />loose concrete, sandblast and clean reinforcing, batch and proportion cement, sand and water, to <br />erect forms and formwork to which concrete is to be applied pneumatically and place miscellaneous <br />reinforcing for repair of concrete and to proportion and place cement and intergrout by pneumatic <br />pumping methods that under an agreed specification subsurface load bearing capacities can be <br />stabilized or previously settled structures raised or restored to plumb, grade or alignment. <br />Those who are qualified to install, maintain, repair, alter or extend any systems of piping, tubing, <br />vessels, containers, pumps, apparatus, and appurtenances, in connection with such pressure piping <br />used for circulation, transporting, holding or processing of any gas, vapor, fluid, liquid, semi-liquid <br />or any combination thereof, provided however, that boilers, boiler piping, piping used to convey <br />potable water, sanitary sewage, liquefied petroleum, manufactured or natural gas or refrigeration, <br />air conditioning and comfort heating piping shall not be part of the scope of such work. <br />Those who are qualified to erect structural precast concrete units such as decks, beams, girders, <br />walls, columns and stairs that are or may be used as structural members for buildings and structures, <br />including welding and rigging in connection therewith and to erect precast concrete units for guard <br />rails and decorative panels above the ground floor, including such minor field fabrication as may <br />be necessary. <br />