Sit Up And Take Notice

That’s a little bridge over a little creek. It was built in 1913 to carry an interurban trolley over Jowler Creek near the small town of Camden Point, Missouri. The route of the trolley is now Interurban Road, and after the trolley company failed in 1933, the bridge was converted to carry car traffic. Interurban …

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Without Visual Hierarchy

Vierendeel trusses are misnamed. They’re really frames, not trusses. In ordinary trusses, most or all of the members are designed for primary stress consisting of axial load, while every piece of a vierendeel, by definition, has bending. But they have been used (when they’ve been used, which is not that often) in the same places …

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Tunkhannock and the End of the Line

So after masonry, wood, iron, and steel viaducts, what’s left? The 1912 Tunkhannock Viaduct, above, constructed to eliminate a sloped and winding valley passage by the Delaware, Lackawanna and Western Railroad (AKA, the Lackawanna), is entirely concrete. It’s a spectacular structure in general, with ten 180-foot arch spans, and with the deck up to 240 feet …

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Another Problem With Classification

This is not just another skyscraper post because the building above is not just another skyscraper. That’s the 1903 Ingalls Building in Cincinnati, photographed when it was brand new, and its mere existence badly messes up any simple narrative of skyscraper development. Ingalls was the first skyscraper with reinforced-concrete structure. I firmly believe that there …

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