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 I was a product designer, people would ask what I did for a living, and sometimes I’d answer “I draw pictures of websites.”
Sure, I could just say “I design websites.” That’s true. The end result of my work is (hopefully) that a website looks better, works better, or results in better outcomes.
But most of my day isn’t spent looking at the website, or working on the code of the website, or manipulating the website directly in some way. It’s spent in Figma or Sketch, drawing pictures of how I think the website should look and work.
Through some kind of alchemy, the pictures I draw have an impact on the finished website. But they’re not all the same.