I run a Fab shop and am located right next door to the community college welding shop. I am in a rural community where every farm kid around here thinks he can weld. Those are the $12 / hour kids. If you have certs and can read a blue print you are closer to $20 / hour. Keep in mind that most structural certs can be obtained within a semester at the community college, so you get what you pay for. In the last 10 years I have worked with union Pipefitters, Boilermakers, Iron workers, and Millwrights in Chicago and Quebec, as well as Pipefitters from the gas fields in Wyoming and Colorado. Those guys are on an entirely different level. Welding Certs from the college will only get you to an apprenticeship with these crews, and then you really start to learn how to weld. Those guys are the 6 figure income welders. If someone needs a trailer fixed or a fence built, I direct them to the kids that just got their certs. If I need a tank built, pipeline run, or a new boom built for a crane, then the real welders get the call.