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.
In the terrific documentary about his work, The Secret Life of Lance Letscher, the collage artist points out that he doesn’t want his file boxes of source material organized too much, that he specifically avoids organizing them, so that he can find unexpected things when he starts searching. “He depends upon that chaos of stuff, of things lying around.”
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There are several paragraphs in Murch’s book about the importance of fighting against the touted “features” of digital tools, such as speed. “The real issue with speed,” he says, “Is not just how fast can you go, but where are you going so fast? It doesn’t help to arrive quickly if you wind up in the wrong place.”
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If I was simply able to execute a full-text search on my notebooks, and pull up exactly what I was looking for, that’s all I’d find: exactly what I was looking for. And the real art is in finding what I didn’t know I was looking for.