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.
The traditional process of delivering design, vs. delivering design just in time.
Designers are often working at least one sprint ahead of engineers. While one sprint might not seem like much of a lag, a typical product team learns a lot after the design hand-off. ...Instead of working ahead, we should finish designing as close to the end of a sprint as possible: just-in-time design.
Get embedded in the team. Designers should use sprint planning, grooming, standup, and retro as opportunities to provide design to — and receive feedback from — the rest of the team. Designs can take the form of written or verbal descriptions, not just wireframes and high-fidelity mockups.
Only design what’s needed. Use constant communication between engineering and product partners to understand what your collaborators will need next. Then, plan on delivering only what is needed, and nothing more. Use the agile process — grooming, planning, and retro — to find any shortfalls or excesses.
Avoid creating a backlog of designs. Designs don’t age well. In the time between finishing design and shipping code, it’s likely that you’ll learn something new that changes your understanding. If you’re producing more design than can be implemented, focus more on the quality of each design.