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Catenoid Structure Featuring Steel Truss for Flexible Urban Living

Authors:
Jordan Yerbury, Kai Wang
Catenoid Structure Featuring Steel Truss for Flexible Urban Living
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A catenoid structure supported by a steel truss enables flexible living spaces in the heart of Toronto, addressing the need for adaptable urban housing solutions.
5 key facts about this project
01
Catenoid form enhances structural stability while maximizing interior space.
02
Steel truss system reduces the need for central columns.
03
Adaptable podium space allows for dynamic use over time.
04
Overlapping structural systems create versatile living environments.
05
Located in Toronto's Quayside, addressing urban housing shortages.

The design proposed for Toronto's Quayside area focuses on responding to urban challenges such as housing shortages and economic changes. It aims to create a building that can adapt its spaces for different uses, ranging from homes to commercial areas. This flexibility is essential for reducing empty spaces, ensuring the building can remain useful during various crises while also enhancing the vibrancy of the urban environment.

Structural Innovation

Inspired by the structural system of the Federal Reserve Bank, the design employs principles reminiscent of a suspension bridge. This allows for smart use of materials that reduce the need for columns in the middle of the floor spaces. A large truss hangs from concrete elevators, replacing thick concrete columns with thin cables. This innovation opens up the interior and enhances usability.

Podium Adaptability

A key feature is the adaptable podium area. Designed to serve various functions over time, the podium can be reconfigured to meet the changing needs of the community. This design approach helps prevent vacancies, ensuring that the building is active and relevant, even during difficult economic times or public health emergencies.

Residential Configuration

Above the podium, the residential levels utilize a form that maximizes strength while efficiently using concrete. This structural method ensures stability and supports an even distribution of living spaces. Each unit is designed to be easily accessible, promoting a sense of community within the building.

Functional Versatility

The project incorporates overlapping structural systems that allow a large catenoid to support symmetrically loaded columns above, creating useful spaces below. Special floor components can be removed when necessary, making room for different types of commercial activities. This aspect of the design equips the building to meet future urban needs well.

The use of the area under the Gardiner Highway for parking and storage of adaptable floor decks adds practical space management to the design. These considerations work together to present a thoughtful response to the demands of modern urban living.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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