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.
Dame Wendy Hall, at the University of Southhampton, sought to extend the life of the link further in her own program, Microcosm. Each link made by the user was stored in a linkbase, a database apart from the main text specifically designed to store metadata about connections. In Microcosm, links could never die, never rot away. If their connection was severed they could point elsewhere since links weren’t directly tied to text. You could even write a bit of text alongside links, expanding a bit on why the link was important, or add to a document separate layers of links, one, for instance, a tailored set of carefully curated references for experts on a given topic, the other a more laid back set of links for the casual audience.