How Singapore Built the World's Largest Dome

It spans 310 metres with no columns holding up the middle - the largest free-span dome ever built. Its roof slides open in two halves, its underside is one of the biggest LED screens in the world, its lowest tier of 30,000 seats physically moves to switch between football, athletics and cricket, and it cools 55,000 people one degree north of the equator. This is Singapore's National Stadium, and on 9 August 2026 it hosts the country's 61st National Day. This is the engineering behind it: how yo