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Expo 2025 Osaka to have symbol ring, world’s largest wooden structure

10:09 | 01/08/2022

(Construction) - Japan Association for the 2025 World Exposition revealed on July 13 the basic design and the new perspective drawing of the symbolic facility "The Great Roof" of the Expo site in Yumeshima, Konohana-ku, Osaka City.

The "Ring" will be one of the world's largest wooden structures, with an area of approximately 60,000 square meters, a circumference of approximately 2 kilometers, and a height of 12 to 20 meters. The roof will be supported by the traditional Japanese construction method to assemble wooden pillars and beams which is similar to the technique used in Kiyomizu Temple in Kyoto City. Architect Sou Fujimoto, Expo Site Design Producer, expressed his hope that the realization of the large roof will "make Japanese wooden architecture and spaces lead the world.

Expo 2025 Osaka to have symbol ring, world’s largest wooden structure

Noting that the number of wooden buildings is increasing around the world, "Proposing wooden architecture for a new era will have a great appeal to the world. As a leader in wooden architecture, I want to show the traditions of Japan," said Mr. Fujimoto. The "modern redesign" of the through-beam construction method would "create a modern, futuristic wooden structure with the flavor of traditional architecture.”

The top of the large roof will be banked. The inner circle of the ring is 12 meters high and the outside is 20 meters high. The width is approximately 30 meters. A planting space is also provided, and the roof is planned to coexist with nature and symbolize the ecosystem of the entire venue. The amount of wood used is expected to be approximately 20,000 cubic meters. As parts of the structure will extend out over the water, “Construction of the foundation will be a big challenge," the architect said. The construction cost is estimated at approximately 35 billion yen. The design will be completed by March 2023 with construction slated to begin in April 2023 or later. (2022/07/14)

The Daily Engineering and Construction News of Japan


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