Routine design When we think of bridges, it is the dramatic and monumental long spans that come to mind first, especially the lithe suspension bridges such as the Golden Gate and the pure geometric arches such as Sydney Harbour. But the majority of bridges are not such spectacular structures. Most of them are ordinary overpasses, with spans of 30 or 40 feet, carrying roadways or rails across other thoroughfares or over small streams. You see such bridges by the dozen on any drive down the Interstate. They may be lacking in glamour, but they are more representative of a bridge builder's art. The engineering and construction of girder bridges are pretty routine these days, but the bridges are not quite standard items you order from a catalogue. The girders, whether of steel or concrete, are custom-build for each bridge, then trucked to the site and hoisted into place with a crane. The designer still has scope for variation and creativity, and it shows out on the highways: some overpasses are prettier than others. Brian Hayes, Infrastructure: A Guide to the Industrial Landscape engineeringdesignautomationroutine
Tilted Arc An Artwork by Richard Serra www.artdex.com In the 1980s, Serra found himself in the center of a public controversy over his piece titled Tilted Arc. While it was the government that approached him to create the work for downtown Manhattan’s Federal Plaza, the unveiling of the piece in 1981 was met with sharp criticism. The monumental sculpture was said to disrupt rush hour and the pedestrians who had to cut through the plaza daily. To the dismay of art lovers, the 120-foot-long, 12-foot-tall Tilted Arc was ultimately disassembled in 1989. Weathering SteelWrapped Reichstag20 Minutes in ManhattanPortal Park Slice cities