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.
Arturo Soria y Mata, who proposed a linear streetcar suburb for Madrid in 1882 and managed to build something like three miles’ worth of an intended thirty. Likewise, the project by Edgar Chambless for Roadtown, published in 1910, depicted an infinitely long, two-room-wide building atop three levels of underground rail lines for express, local, and freight traffic. In the late 1920s, N. A. Miliutin proposed a Soviet Union–spanning linear plan that—following Soria y Mata’s rhetoric—would have solved the old Marxian chestnut of city/country contradiction at a stroke. Le Corbusier’s Algiers scheme of 1933—a highway-topped fourteen-story building meant to stretch miles along the Mediterranean and house 180,000 people—was surely the most immediate precursor of Rudolph’s “City Corridor.”