I worked on a construction crew one summer in 1966 building concrete structures for a sewage treatment plant. Based on this article, not much has changed.<p>It was interesting to see the hierarchy of the various trades. The rodbusters (rebar workers) were cocky, fast, and had no body-fat. The carpenters that built the forms for the concrete were fat, slow, and drank vodka all day. And the laborers (e.g. me) were there mainly to entertain everyone else, lol.