Archived - Standard Industrial Classification - Establishments (SIC-E) 1980
4255 - Millwright and Rigging Work
Establishments primarily engaged in the hoisting, installation and dismantling of large-scale apparatus and special equipment such as central air conditioning plants, industrial process and materials handling equipment, hydroelectric station and sewage treatment plant components. Establishments primarily engaged in installing elevators and escalators are classified in 4291 - Elevator and Escalator Installation.
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