It hasn't changed that much in 10 years, I'd be surprised to see any construction site with even 10% women workers. Equipment operators and trades are separate. Much easier to get a ticket to operate a forklift or steam roller then it is to become a journeyman plumber (for ex). I have yet to encounter a female plumber that could not be confused as a man from behind. Working trades IS tough work, but rewarding both psychologically and financially. I got out of trades more for physical reasons than I did for financial reasons (though the financial benefits did come eventually). There are alternates, which is why my observation that many / most women in trades are either butch, single mothers or slutty women that like working in an area where they get a constant stream of Male attention.