That also depends on what type of trade you get in. I'm a Union Ironworker myself, and make $28/hour. Demand for Ironworkers is great, but its not for everyone. Not everyone is comfortable walking something as wide as a ruler (not length wise) at dwindling heights. Not many are comfortable building bridges, power plants, silos, skyscrapers, and mass buildings...
As well as that, the area (state/city), and the rate on renovation and construction will determine the need for that particular trade. Even the time of year will determine how booming construction is. The electricians here make around $5-6 more than we do, yet they're laid off throughout a lot of the year, where-as we're constantly busy. The Carpenters are pretty slow majority of the time to.
If you do decide to go for a trade skill; remember this... Its not what your getting paid, its your work ethics, attitude, and craftsmanship that keeps you working. If you're lazy, suck at your job, or plain just show yourself off as an oaf on the job site; your going to be laid off majority of the time and not many will want you on their job site. If your skilled, proficient, and professional about what you do, then you won't go hungry

Just to give an example...my first year in, I made $123,000...it wasn't just because of my wage rate
