On June 30, 2023, the assembly of the Grand Roof (Ring) that will be the symbol of the Japan World Expo site began in the PW Northeast construction area on Yumeshima, the site of Expo 2025 Osaka, Kansai, Japan. Source: Timberbiz
The Grand Roof is being built for the next World Expo on the man-made island of Yumeshima with about 20,000 cubic metres of wood and constructed using traditional Japanese techniques with no nails.
The units, consisting of 420mm square lumbers and 210mm x 420mm beam timbers were pre-assembled on the ground, then lifted and put together by crawler cranes.
The wooden Ring was assembled sequentially from the areas where the foundation work was completed. Most of the giant timber roof has been erected, it has a height of 20 metres and contains an eight metre walkway.
When completed, the Grand Roof (Ring) will be one of the largest wooden structures in the world, with an inner diameter of approximately 615 meters and a circumference of approximately two kilometres.
The next thing to be built is the Forest of Tranquility which is eight signature pavilions and hundreds of country pavilions mostly made of Japanese wood and located inside the wooden ring.
