Not all the towers along a transmission line are identical. Look closely at a tower where the line makes a sharp turn and you will likely find it is wider and beefier than other towers along the route. The added strength and weight are needed to resist the unbalanced pull of the conductors, which might overturn an ordinary tower. These special towers are called deviation or angle towers.
The transmission-line tower everybody knows is an Erector Set latticework of steel girders and diagonal braces. The techniques for designing and building these towers are the same ones used in constructing steel bridge trusses or crane booms. The individual pieces can be made cheaply from rolled steel and then bolted together on the site. This last point is more important than it might seem: transporting a fully assembled tower 100 feet tall is an awkward and expensive business.
Normally after the design was built, you would find places for the art to be located and then you would go out and select the artist that you wanted. That is historically, the traditional way to go.
But this time, someone else was calling the shots. A planning official, basically, who comes along and says, “We want you guys to work with an artist.” And the architects are like, “Sure of course.” But then the official goes—“No, you don’t quite understand. We want you to use an artist as a co-equal member of the design team.” That is, the artists are going to have just as much control as the architects. It was really unheard of.