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.
When poet William Blake wrote of "dark satanic mills", he couldn't have been looking at a steel mill because there were none in 1804. Nevertheless, when I visit a steel mill, Blake's phrase always comes to mind. With the heat and the pounding noise, the dust and smoke, and the red glow against the night sky, it's hard not to see these places as infernal. And yet the process of making steel also produces some of the most hauntingly beautiful images found anywhere in the world of industry.
Sentences and words do not exist by themselves, but have natural, inevitable, unavoidable interactions with their surrounding spaces, words, and other sentences. Sentences are not independent of their spatial context, and interactions can create meanings and harms. Sentences survive content-indifferent and content-hostile spacings, but surviving is not thriving. Text space should not be owned and governed by generic productions grids, which make for convenient production but inconvenient meaning. Space can and should be content-responsive, actively contributing to meaning – forever practices in poetry, maps, math, computer code, comics, theater/movie scrips, posters. Subtle visual spacing differentiates and clarifies sentences, and meaning becomes more consequential, memorable, retrievable.