Construction methods

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Two separate failures of three canti­levered flanges of three precast, prestressed-concrete double-T parking-deck sections—reinforced with a non-code-compliant, high-strength carbon-fiber-reinforced polymer grid—are putting the spotlight on the structural safety of corrosion-resistant FRP grids for transverse reinforcement of double-Ts.

For physician-scientist Richard P. Lifton, 19 nights of intentional sleep disruption last summer had nothing to do with a medical experiment.

Caltrans engineers are scrambling to replace Pfeiffer Canyon Bridge, a 317-ft-long, concrete continuous box-beam bridge on a key coastal highway after mudslides moved one of the support columns more than a foot, causing the span to crack and bow.

It was a risky job, subject to myriad variables, the least of which was the fickle currents of New York City’s tidal East River.

The architecture and structure of London’s emerging 62-story building at 22 Bishopsgate bear no resemblance to its predecessor, called the Pinnacle, initially intended for the same site but abandoned soon after coming out of the ground.

The Antony Gormley sculpture celebrating the 100th anniversary of the William Welles Bosworth-designed MIT mathematics building filled one “Best of the Best” judge with “wonder.”

An independent report cites faulty stitching and grouting process.

Compared with some of its Manhattan neighbors, a high-rise on the corner of Seventh Avenue and West 47th Street looks standard.