The Trades That Build and Run Everything
Here is what the concrete-and-steel picture hides: the schedule of any serious build is set by a small, credentialed group, medium-voltage electricians, coded pressure welders, controls technicians, and their peers, and these people are not interchangeable with each other or with general labor. The trades are stacked in sequence and legally gated by licensing, so a shortage in one early crew idles every crew behind it. The honest question is never how many construction workers a region reports, but how many qualified hands in each specific trade are actually free in the exact months you need them, net of everything else being built nearby. That smaller number is the one that decides your timeline.
Knowledge check
Why can a region with plenty of construction workers still be effectively short of labor for a specific project?
Show the answer
Because the trades are specialized, legally gated by licensing and certification, and not interchangeable. A surplus of one trade cannot cover a shortage in another, and the binding constraint is usually a narrow group, such as medium-voltage electricians or coded pressure welders, whose available headcount in the specific months you need them is far smaller than the headline construction employment figure.