Introduction to structural features: The Sydney Opera House is an Expressionist building with a novel design. The whole is like a white sail about to ride the wind to the sea: the largest two sets of sails are arranged along the north-south direction, gathering in the south in a slightly V-shaped manner; Another pair of small sails is located to the southwest of them, and between them is the Benilan restaurant. The opera house has a total area of 2.2 hectares and is supported by 588 concrete piers sunk 25 meters below sea level. The roof is made up of 2,194 precast concrete panels supported by rib-like precast concrete elements, each weighing approximately 15 tons. The entire roof weighs 27,000 tons and is covered with 1,056,006 panels made from Swiss Ha The smooth white ceramic tiles with herringbone patterns made by Höganäs look like white sails about to sail out to sea from a distance.