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Load Path

One structure. One connection. The load path that failed. Every video is a single investigation: the building, bridge, walkway, dam or stadium, the load it was designed to carry, and the joint, bolt, weld or slab that gave way. Named events. Real numbers. The mechanism, not the montage.

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Hyatt Regency: One Washer Held the Whole Walkway

Hyatt Regency Kansas City walkway collapse, 17 July 1981. Title: Why the Walkway Hung From the Wrong Nuts. One investigation: the 4th-floor box-beam-to-hanger-rod connection. Original continuous 1.25-inch rods vs the as-built two-rod change that doubled the load on that connection. NBS BSS 143 / Marshall 1982. Failure: nut and washer pulled through the box beam; progressive collapse. Attribute the

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Hyatt Regency: One Washer Held the Whole Walkway

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