The light from your computer screen is a bit strange. And it's not just because of the websites you visit. If you have a computer with a flat screen liquid crystal display, turn it on. Open your word processor to display the writer's block screen (pure white).
Crane 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.
Different types of cranes exist depending on the particular job that needs to be completed. One of the most commonly seen cranes seen in cities is a tower crane. Tower cranes were initially developed in Europe and are now popular all over the world. A tower crane is used in the construction of tall buildings. This type crane can reach up to 265 feet, out to 230 feet, and lift a total of approximately 20 tons. Tower cranes are fixed to the ground during the construction period.