How Singapore Hung a 40-Meter Waterfall Inside a Glass Donut

A glass roof shaped like a donut, with a 40-meter waterfall poured straight through the hole in the middle - and barely a column holding up the hall beneath it. This is Jewel Changi Airport in Singapore, and its roof is a masterclass in structural engineering. Here is how it actually stands up. We break down how it stands up: the gridshell (why a doubly-curved steel shell works like an eggshell), the 9,000-plus near-unique glass panels made possible by parametric design, the reinforced ring tha