1 High altitude: 1,500 to 3,500 metres (4,900 to 11,500 ft) - The onset of physiological effects of diminished inspiratory oxygen pressure (PiO 2) includes decreased exercise performance and increased ventilation (lower arterial PCO 2).
Structural Iron / Steel Worker Salary. (United States). Men make up the majority of Structural Steel Workers in the United States, bringing in about $18.59 per hour. Pay generally varies between $12.81 per hour and $30.32. Unfortunately, some people in this line of work are without benefits â about two-fifths lack coverage. On the flip side, more than half have medical insurance and nearly two in five receive dental plans.
As of May 2011, the Bureau of Labor Statistics estimates that about 41,070 crane and tower operators were employed in the United States. These workers earned an average wage of $24.06 an hour and $50,040 a year.The middle-earning 50 percent of crane operators reported wages of between $17.07 and $29.36 an hour, with annual salaries ranging from $35,510 to $61,060 per year.rane operators employed primarily in nonresidential building construction made somewhat less, an average of $53,070 a year. Those who worked in mining averaged $47,010 per year, and those employed by iron and steel mills made an average of $45,710 per year. Related Reading: Salary of a Barge Crane Operator.