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.
Another great dissertation from Mark Brown of Game Maker’s Toolkit: The Games that Designed Themselves. It’s the radical idea that designers should ignore their preconceived notions and look to the game itself to find out where the development should lead. How does something design itself? Well… the answer is: Prototypes.
A lot of great indie game masterpieces are the result of experimentation and early gameplay demos that changed the course of game’s development. As Brown points out, there’s a whole history of groundbreaking games that were developed “almost by accident” where bugs and glitches were turned into features.