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.
It has long been understood that striving for originality as an end in itself is the mark of an inferior artist. The personal style of a good artist is never something that has been deliberately cultivated and forced but something that has appeared unsought as inevitably as the personal style of a man's handwriting.
But since artists of note are seen to have a distinct personal style, no artist can hope to make a reputation in a competitive society unless he too can show a distinctive style which easily differentiates his work from that of other artists and draws attention to it. Therefore artists of little capability or uncertain vocation will take great care to make their work look 'different', whereas those with any certainty in them will know that their work cannot help but look different from that of other people any more than signatures can.
It is worth reflecting that the fact of the unmistakable individuality of each man's signature is one foundation of modern commerce everywhere. To establish the individuality of it one need not write it vertically up the page in letters two inches high. And yet there are only twenty six letters, and everyone else uses them too.