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Kyoei Steel is Japan鈥檚 leading steel producer, specializing in recycling iron scrap. Using electric arc furnaces, the company transforms scrap iron鈥攃onstruction waste like H-beams, cars, mobile phones, vending machines, and medical needles鈥攊nto high-quality steel products for construction. This transformation of 鈥渙nce-used iron鈥� into valuable steel forms the foundation of its business. Building on this expertise, Kyoei Steel has advanced into environmental recycling, utilizing technologies to render industrial waste harmless.
This project, at Kyoei Steel鈥檚 Yamaguchi Division, replaces and consolidates aging office and welfare buildings, enhancing site efficiency. By centralizing dispersed office functions, the new building improves productivity and provides a better working environment, while enriching welfare facilities, including dining halls and bathhouses. The exterior design, inspired by steel billets stored at the plant, symbolizes regenerating scrap iron into structural steel. The fa莽ade features five stacked billets with varied attributes, enhanced by two vertically divided stairwell volumes, forming a composition of seven billets. Each billet鈥檚 unique colors and textures reflect Kyoei Steel鈥檚 product diversity and identity in a striking aesthetic.
Inside, steel products from the Yamaguchi Division, such as equal-angle steel, flat bars, and deformed bars, are prominently featured as finish materials, celebrating their raw strength and aesthetic potential. Materials like angle steel (L30x30, 50x50, 75x75), flat bars (FB-32, 50), I-bars (I-BAR-44, 75), and deformed bars (10蠁, 25蠁, 38蠁) were used for walls, ceilings, and the company鈥檚 barcode pattern. The stairwell features 93 wires (6蠁) stretched across 20 meters, with five types of angles and seamless lighting. A QR code of the company鈥檚 website is integrated into the horizontal plane, while staircase handrails use randomly arranged angles and deformed steel bars. On the west side, similar steel bars cover the stairwell from floor to penthouse, interacting with handrails and lighting to emphasize verticality.
This interplay of light, shadow, and raw steel highlights Kyoei Steel鈥檚 technological strength and innovative spirit. Dynamic lighting effects embody the company鈥檚 brand identity. By showcasing materials and integrating values, the project harmonizes functionality and design. Rooted in the company鈥檚 recycling philosophy, it presents a prototype for architecture merging sustainability, innovation, and identity with a unique spatial experience.