721 Sheet and Structural Metal Workers, Moulders and Welders, and Related Workers

Metal moulders and coremakers make moulds and cores for casting metal. Tasks include - (a) making moulds by hand or using auxiliary machines on a bench for small metal castings, on the foundry floor, or in a pit for large castings; (b) making cores for use in metal moulds; (c) cleaning and smoothing moulds, core boxes, and repairing surface imperfections; (d) moving and positioning work pieces such as mould sections, patterns and bottom boards, using cranes, or signalling others to move work pieces; (e) positioning patterns inside mould sections and clamping sections together; (f) cutting spouts, runner holes and sprue holes into moulds; (g) lifting upper mould sections from lower sections and remove moulded patterns. Examples of the occupations classified here: - Coremaker - Metal casting moulder.

Welders and flame cutters weld and cut metal parts using gas flame, electric arc and other sources of heat to melt and cut, or to melt and fuse metal. Tasks include - (a) welding metal parts using gas flame, or an electric arc, thermite compound or other methods; (b) operating resistance-welding machines; (c) using blowtorches to make and repair lead linings, pipes, floors and other lead fixtures; (d) brazing metal parts together; (e) cutting metal pieces using gas flame or an electric arc; (f) joining metal parts by hand soldering; (g) monitoring the fitting, burning and welding processes to avoid overheating of parts or warping, shrinking, distortion or expansion of material; (h) examining work pieces for defects and measuring work pieces with straight edges or templates to ensure conformity with specifications. Examples of the occupations classified here: - Brazier - Flame cutter - Welder.

Sheet metal workers make, install and repair articles and parts of articles made out of sheet metal such as sheet steel, copper, tin, brass, aluminium, zinc or galvanized iron. Tasks include - (a) marking sheet metal for cutting and shaping; (b) making and repairing household utensils and other articles in tin, copper and light alloys, or ornamental articles and fittings; (c) making and repairing boilers, tanks, vats and similar containers; (d) installing and repairing sheet metal parts of vehicles and aircraft; (e) converting blueprints into shop drawings to be followed in the construction and assembly of sheet metal products; (f) determining project requirements, including scope, assembly sequences and required methods and materials, according to blueprints, drawings and written or verbal instructions; (g) inspecting product quality and installation to ensure conformity with specifications. Examples of the occupations classified here: - Boilersmith - Coppersmith - Panel beater - Tinsmith Notes Installers of metal roofing are classified in Unit Group 7121: Roofers. Installers of metal drains, gutters and ducts are classified in Unit Group 7126: Plumbers and Pipe Fitters. Workers who make sheet metal products for adaptation and installation by roofers and plumbers are classified in Unit Group 7213: Sheet Metal Workers.

Structural metal preparers and erectors assemble, erect and dismantle structural metal frames of buildings and other structures. Tasks include - (a) marking metal framework as a guide when drilling cutting, and shaping metal stock for use in buildings, ships and other structures; (b) drilling, cutting and shaping structural steel in a workshop; (c) erecting steel framework for buildings, bridges and other constructions; (d) assembling and erecting the framework and other metal parts of ships’ structures; (e) shaping and fitting structural steel plates of ships under construction or repair; (f) riveting structural metal members by hand, machine or pneumatic riveter. Examples of the occupations classified here: - Erector, structural metal - Preparer, structural metal - Riveter Some related occupations classified elsewhere: - Rivet production machine operator - 7223.

Riggers and cable splicers assemble rigging gear to move and position equipment and structural components, or install and maintain cables, ropes and wires on construction sites, buildings or other structures. Tasks include - (a) estimating the size, shape and weight of objects to be moved and deciding on the type of equipment to move them; (b) installing and repairing cables, ropes, wires, pulleys and other tackle; (c) joining, repairing and fitting attachments to wires, ropes and cables; (d) working as member of a crew erecting and repairing derricks for drilling water, gas and oil wells; (e) lifting and mounting scenery, lighting and other equipment in theatres and on film sets; (f) installing and maintaining communication towers, aerial cableways, funicular railways, ski lifts and similar infrastructure. Examples of the occupations classified here: - Cable and rope splicer - Rigger - Ship rigger - Theatrical rigger - Tower rigger Some related occupations classified elsewhere: - Cable splicing machine operator - 8189 - Crane, hoist and related plant operators - 8343.