Sreed Ebisu T Oficeja Konstruaĵo by Salhaus

Sreed Ebisu T Oficeja Konstruaĵo by Salhaus is a highly esteemed winner of the very prestigious 2025 Arĝenta A' Design Award in Dezajno de Arkitekturo, Konstruaĵoj kaj Strukturoj Competition Category.

ArĝentoArkitekturo· 2025

Sreed Ebisu T Oficeja Konstruaĵo

by Salhaus

Client: Sapporo Real Estate Co., Ltd

Arĝenta A' Design Award Winner in Arkitekturo Category

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The Design

About Sreed Ebisu T Oficeja Konstruaĵo

Sreed Ebisu T estas naŭetaĝa oficeja konstruaĵo en Ebisu, distrikto Shibuya, Tokio. La konstruaĵo uzas hibridan strukturon, kiu kombinas ŝtalan fostan kaj traban kadron kun lignaj sismaj kadroj enmetitaj en ĝin. La ligna kadro, nomata la sisma ligna krada ŝelo, servas kaj kiel struktura kaj kiel interna elemento. Elementoj, kiuj rezistas nur sisman forton, ne postulas fajroŝirmadon, do la ligno restas videbla. La malsupraj etaĝoj enhavas restoraciojn aŭ butikojn, kaj la supraj etaĝoj enhavas oficejojn. Komunaj terasoj laŭ la ŝtuparo subtenas paŭzojn kaj interagadon.

The Recognition

About the Arĝenta A' Design Award

Sreed Ebisu T Oficeja Konstruaĵo estas gajninto de la Arĝenta A' Design Award, grandege prestiĝa rekono donata al plejklasaj, belegaj kaj impresaj dezajnoj. La Arĝentaj gajnintoj estas treege brilaj kaj treege kreemaj verkoj, kiuj ilustras la elstaran sperton, talenton kaj sagacon de siaj dezajnistoj. Oni atendas, ke Sreed Ebisu T Oficeja Konstruaĵo estu mirinda, montrinda verko, kiu estas rimarkinde profesia kaj profunde nova. Ĉi tiu dezajno gajninta la Arĝentan A' Design Award estas tre rimarkinda, admirata inventaĵo, kiu profitigas kaj antaŭenigas la limojn de arto, scienco, dezajno kaj teknologio. Sreed Ebisu T Oficeja Konstruaĵo estas vaste enviata kreaĵo, kiu vekas dezirojn, alportas pozitivajn sentojn kaj ekbrilas miron kaj mirigon.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: This project is a nine-story office building in Tokyo. We tried to create a new prototype for urban timber architecture in this project. Our proposal was a hybrid structure of a steel post-and-beam frame and timber seismic frames inserted into it. This timber frame, which we call a "seismic timber lattice shell," is not only a structural but also an interior element to realize new workspaces where people can work in a more relaxed mode, enjoying the spatial value of the timber construction.
Dimensions & Packaging: This project is a 9-story, 34.3m-high rental building with a total floor area of 564.7m2 and a footprint of 80.0m2. The ground and first floors are for restaurants or retail stores, and the third to ninth floors are for offices. It has an evacuation staircase and an evacuation balcony on each floor required by law, and an elevator. In addition, it is a fireproof building under the Building Standards Act.
Tags: Architecture, Timber, urban, Office, workspace
Production Technology: Urban timber architectures, which have recently been booming in Japan, are dominated by multi-story buildings with post-and-beam frames that have acquired special fire-resistance certification. However, these buildings simply replace RC or steel-frame construction with timber and do not possess the spatiality unique to timber construction. Our goal was to create a new typology of urban timber architectures that maximizes the spatial value of timber construction and allows end users to enjoy the value.
Design Challenge: As this was an unprecedented construction method, we put great effort into the detailed design of the steel and timber joints. During the construction phase, we formed a team with a contractor, a steel fabricator, and a timber fabricator, both with high technical capabilities, and worked out the details of the joints while sharing 3D data. In addition, there were differences in the production accuracy between the two fabricators, so we paid close attention to the accuracy management on site.
Research: Two primary motivations for promoting the construction of timber buildings in Japan today are, reducing CO2 emissions during construction and making use of the vast forest stock. Structural strength and fire resistance are the main issues when employing timber for urban buildings. We developed a method of using timber as a seismic element to brace steel frames, which can also work as an exposed interior element; structural members that only act against seismic force do not require fireproofing.
Inspiration: The design of this building was carried out during the COVID-19 pandemic. People stayed home; some even said office buildings were no longer necessary. In this project, we considered what kind of workspace would be worth visiting and working in even after online working technology was established. Our answer was architecture, which provides the comfort of a home and maximizes the value of working together.
Project Duration: This building's site is located in Ebisu, Shibuya-ward, Tokyo. We designed the building from June 2020 to June 2021, and construction work was carried out from June 2021 to January 2023. The building was put into use immediately after that, and all floors are currently rented out to tenants.
Operation Flow: In addition to creating an intimate workspace wrapped in timber on each floor, we created rich common spaces to facilitate workers' interaction. We designed a staircase not only as a simple evacuation route but also as a daily traffic route and arranged many common terraces along it. Taking a break outdoors or communicating with people from other companies will activate collaboration and creativity among workers.
Team Members: Architect: Motoki Yasuhara
Architect: Masashi Hino
Architect: Mari Tochizawa
Structural Engeneer: Jun Sato
Image Credits: Image #1：Photographer Makoto Yoshida, 2023
Image #2：Photographer Makoto Yoshida, 2023
Image #3：Photographer Makoto Yoshida, 2023
Image #3：Photographer Makoto Yoshida, 2023
Image #4：Photographer Makoto Yoshida, 2023