| http://www.w3.org/ns/prov#value | - Even though the primary metal involved in this work is steel, these workers often are known as ironworkers or erectors.When building tall structures such as a skyscraper, ironworkers erect steel frames and assemble the cranes and derricks that move structural steel, reinforcing bars, buckets of concrete, lumber, and other materials and equipment around the construction site.
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