An Unexpected “Un-“

This post was triggered by a spot-on question from Julia Manglitz about my comments on the fourth Rocky River Bridge. The main structure of that bridge consists of unreinforced concrete arches, and Julia asked “I’m curious about any thoughts you have on the relative durability of reinforced versus non? It seems as though reinforcement corrosion …

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Failure Portrait: Decay

It’s been a while since I’ve done one of these. That’s what wood looks like just before it falls apart completely. It’s possible to stick a pocket knife into that mess with basically no resistance. There are fancy ways that this could be repaired, most involving some kind of epoxy impregnation. The thing is, this …

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It’s Not Invisibility

Beautiful, isn’t it? What is it? It’s the joint between two sections of a fire-escape handrail in Brooklyn. Each section has a frame around its perimeter made up of small wrought-iron angles, which are bolted to the balcony framing below and to each other at these seams. So the angle on the left is part …

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Randomness Visible

Those pictures (click on them to enlarge them) were taken about six hours apart on the day of our last spring snowstorm. The truncated-cone roof is standing-seam copper and encloses an open, unheated mechanical space. If you look closely, you’ll see that the snow ends a bit short of the corner where the slope turns …

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