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.
I have appropriated from Brian Eno and others the distinction between architecture and gardening, and have described my blog as a kind of garden. But lately I’ve been revisiting the architecture/gardening distinction and I have come to think that there is something architectural about writing a blog, or can be – but not in the sense of a typical architectural project, which is designed in advanced and built to specifications. Rather, writing a blog over a period of years is something like building the Watts Towers.
Simon Rodi didn’t have a plan, didn’t even have a purpose: he just started building. His work was sustained and extended by bricolage, the acquisition and deployment of found objects – and not just any objects, but objects that the world had discarded as useless, as filth. You put something in here, then something else, you discover, fits there … over time you get something big and with a discernible shape. Not the regular shape envisioned in architectural drawings, but nevertheless something that can be pleasing or at least interesting to look at – an organic and irregular shape. A geometry of irregular forms.