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.
We designers love artboards. From rough UI sketches to high fidelity mockups, we see ourselves as visual artists expressing ideas on artboards that have a pre-defined width and height. To start a new project, we declare the size of the artboard in the first step.
What about responsive design? Not a problem! We diligently design on three artboards — one for mobile, one for tablet, and one for desktop — with content elegantly adapting, scaling, reflowing, reordering, and reprioritizing. We proudly hand off the artboards to developers while patting ourselves on the back: this is how responsive design should be done.
After weeks of arduous engineering, the product finally comes out. We find, to our great dismay, that some copy is hanging off the grid, the focal point of the hero image has been cropped out, the font sizes don’t even come close to the type ramp. What went wrong? Can’t the developers just see everything on all those artboards?