The Line of Force

As long as I’m rambling on about shoring, I’ll use this opportunity to make a point about how structure works. The picture below shows one piece of a shoring system we installed to keep the front facade, which was moving outward, from peeling off the building. The shoring system consists of horizontal steel braces that sandwich the …

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Historic Structural Detail: Some Artifacts Are Bigger Than Others

In most alteration projects, the first stage of construction is demolition of the interior finishes. When that work is done, we often find conditions that we did not know existed and would not have known with the demolition. Sometimes those conditions affect our work, sometimes they are simply artifacts showing us some information about how the …

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Near-Failure Portrait: Rusty

When I see rust on structural steel, it’s usually in a confined space. We find rust because the steel jacks apart the surrounding masonry or concrete as it turns into rust. When steel is exposed, it’s easier to find the rust and it’s easier to prevent it from getting worse by scraping and painting. Exposed exterior …

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Failure Portrait: Wow

I’ve typically been using photographs from our field work for these posts, but a picture on another site caught my eye and it deserves recognition. AbandonedNYC has beautiful pictures of buildings left to rot. Despite the name, they are not all in New York. This post contains one of the best illustrations I’ve seen of …

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It Looked Good On Paper

During today’s site visit, I killed some waiting time by looking at the canopy over the railroad station: That’s a reasonably fancy welded-truss cantilever coming off the column to support the middle and right-hand channel purlins. (The left purlin is supported on the short cantilever of the truss top chord.) In terms of cost and ease …

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