14/03/2023
西日本最高8階建の都市木造マンション「都島プロジェクト」。
下階3層は鉄骨造、上層5階は木造の1時間・2時間耐火構造です。木造部はLVLの軸組の中に、LVLのブレースやCLTの耐震要素を無被覆で取り付ける構造計画、防耐火計画です。
意匠設計はビルディングランドスケープ、構造設計はU’plan、構造防耐火アドバイスと木躯体製作はシェルターです。
現在の中高層木造は、どうしても技術開発を続けてきた大手ゼネコンが中心となりがちです。それはそれで重要なことですが、中小の建設会社が中高層木造に取り組むには、別の体制も必要です。
都島プロジェクトの施主であり施工者のオリオン建設は大阪市都島区の地場の地域建設会社。大手ゼネコンと組むのはあまり面白くありません。今回は中大規模木造の知見や実績のあるシェルターに「木骨ファブ」として参画してもらい、構造設計や防耐火設計のアドバイスをもらいながら、地域建設会社主導での中大規模木造、西日本最高の8階建の木造建築が実現します。
新しい技術も取り入れていますが、この体制を作れたこと自身が大きな成果になると思います。
The Miyakojima Project, the highest 8-story urban wooden condominium in western Japan.
The lower three floors are steel-framed, while the upper five floors are wood-framed, one- and two-hour fire-resistant construction. The wooden part is a structural plan and fireproof plan in which LVL braces and CLT earthquake-resistant elements are installed in the LVL frame without covering.
Design is by Building Landscape, structural design is by U'plan, and structural fireproofing advice and wood frame fabrication is by Shelter.
Currently, mid- to high-rise wood construction tends to be dominated by large general contractors who have inevitably continued to develop their technologies. That is important, but another possible orginization is needed for small and medium-sized construction companies to tackle mid-rise wood construction.
Orion Construction, the owner and builder of the Miyakojima project, is a local regional construction company in Miyakojima-ku, Osaka. It is not very interesting to work with a major general contractor. This time, Shelter, which has knowledge and experience in medium- and large-scale wooden construction, will participate as a "wood-frame fab," and with their advice on structural design and fireproof design, a medium- to large-scale wooden structure, the highest 8-story wooden structure in western Japan, will be realized under the leadership of a regional construction company.
We are also incorporating new technologies, but I believe that the creation of this team frame itself will be a major achievement.