There may be a good amount of engineers on GH but essentially my job description as a millwright is to make engineers look good. In a nut shell I install, remove, replace, repair, modify, and maintain machinery in facilities ranging from grain handling / processing to nuclear power houses. Here are some pics from my current job installing a 50 ton and a 25 ton bridge crane.
One of the bridge beams for the 50. This piece is 24,000 pounds and spans 65 feet.
The crane used to set the parts/pieces.
The 25 installed.
The 50 ton installed. The combined weight of the parts we set for the 50 was around 65,000 pounds plus the 266 feet of rail that weighed 85 pounds per foot.
Edit: Lots of spelling fixes. I need to quit posting longer posts from my phone.