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.
I’ve written this before but I constantly need to remind myself of it, so, once again: A certain kind of work, lifestyle, mode of living — in and of itself — is protest. That is, work that is curious and rigorous is implicitly an antipode to didactic, shallow bombastity. It is inherently an archetype against bullshit. That to be committed to this work or life of rigor (be it rigor focused on “art” or, as they say in Japanese, sakuhin, or family or athleticism or whatever), and to share it with the world is to opt-out of being paralyzed by idiocy, and help others who may be paralyzed find a path back to whatever fecundity of life it is that they deserve.