energy
Tracing Power Lines with the Pylon Appreciation Society
Pylons
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.
A haunting, syncopated music
"Rappers" on the roof of the electrostatic precipitator knock the accumulated dust free, letting it fall into the storage hopper. Each rapper is the size and shape of a baseball bat. Inside is an electromagnet that pulls a steel plunger upward, then allows it to fall again, producing a sharp knock. The rappers are energized at seemingly random intervals, producing a haunting, syncopated music. (The rhythm seemed more modern jazz than rap.)
Safety cut rope axe man
In the first nuclear reactor, constructed by Enrico Fermi in 1942 under the bleachers of the University of Chicago football stadium, the control rods were held up by a manila rope. A man with an axe was told to cut the rope if the reactor got out of hand. This "safety cut rope axe man" is supposedly the origin of the term SCRAM for an emergency shutdown procedure.
Color coding
Telephone wires erupt in a multicolor cascade in a ground-level, pedestal-type splice case on a city street.
Dividing the set of 10 colors into two contrasting groups of 5 allows for exactly 25 combinations with one color from each group; thus, each pair in a bundle can be uniquely colored. A similar color code is applied to the ribbons that bind together all the pairs in a bundle, and to those of the superbundles. The result is highly festive! A specific wire might be identified as the blue-red conductor within the orange-black bundle within the brown-yellow superbundle.
Don’t Be an Ostrich
You just handed off a major redesign. Three months of research, twenty-seven major revisions, and hundreds cups of coffee have all culminated in this pinnacle of glory. It’s finally done!
Except it’s not.
It’s not, even after you have answered every single question the developers have about your red-line.
It’s not, even after you have addressed all the technical constraints developers encountered during the implementation.
It’s not, even after you meticulously documented all the patterns and styles into a library for reference and reuse.
It’s not, because neither you nor the developers have talked to a real user. At the bottom of your heart, you are secretly wishing:
My design looks great on paper, so let’s keep it on paper.
You are an ostrich.
Post-occupancy evaluation
Post-occupancy evaluation (POE) is a practice in the building industry where an architect would visit the building after its occupancy and interview its residents. It sounds like a great opportunity for collecting feedback and learning from mistakes, but it’s rarely practiced. Why?
Many awe-inspiring, prize-winning architectures are half building, half sculpture. Often made of specially molded concrete and steel, they are extremely expensive to alter, let alone any alteration would also attack the architect’s prestige and pride. So whatever usability issues the POE identifies will remain as issues, unless the architect wants to accept the public criticism and shame that comes with the remodeling.
In fear of criticism, an architect would turn down the opportunity for POE, and continue to design the same roof that would leak water in future projects.
In fear of criticism, a developer would use customer service representatives as a shield against user complaints, while focusing on the “technical” aspect of things.
In fear of criticism, a designer would close the contract as soon as the client accepts the design, even though none of the real users are represented by the client.