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Catenary Curves with Volcanic Ash Create a Community Space in Nature

Author:
Matthew Calvey
Catenary Curves with Volcanic Ash Create a Community Space in Nature
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Utilizing catenary curves and volcanic ash concrete, the design integrates into the hillside while offering panoramic views, creating a community-focused restaurant that emphasizes sustainability and connection to the natural landscape.
5 key facts about this project
01
Catenary curves create structural efficiency and visual appeal.
02
Volcanic ash concrete enhances sustainability and reduces energy use.
03
Design integrates seamlessly with the hillside to promote accessibility.
04
Geothermal heating supports healthy indoor air quality.
05
Layout maximizes natural light for both dining and greenhouse areas.

Hækkandi Veitingastaður is located on a hillside in Iceland, designed to connect visitors with the surrounding landscape. The restaurant emphasizes shared experiences while offering views of Hverfjall Volcano and the Mývatn Nature Baths. The design concept focuses on blending the built environment with the terrain, fostering a sense of harmony between architecture and nature.

Structural Form

The two catenary curves of the building adapt to the slope of the site, creating both visual interest and structural efficiency. This design allows loads to be distributed effectively, which reduces the amount of material needed while maintaining strength. The approach reflects current practices aimed at improving sustainability in construction.

Thermal Comfort

Radiant heating at the ground level enhances thermal comfort within the space. This system allows for a constant flow of fresh air moving upward, which helps prevent uncomfortable drafts. By utilizing geothermal heating, the design promotes healthy indoor air quality, adhering to modern standards for comfort and well-being.

Material Selection

Volcanic ash concrete is a key material used in the construction of Hækkandi Veitingastaður. This type of concrete consumes less energy during production, making it a more sustainable option. The volcanic ash, ground to a fine powder, increases the strength of the concrete. Selecting this material demonstrates a commitment to environmentally responsible building practices.

Landscape Integration

The restaurant’s layout is designed for easy access and movement, featuring a stepped design that blends with the natural terrain. This configuration encourages greenery to become a part of the structure itself. Drawing inspiration from traditional turf homes, the building reflects a style that respects the local landscape.

The building's orientation is carefully planned to maximize natural light. Computer-generated studies have informed the arrangement of greenhouses, ensuring that sunlight reaches both plants and visitors. This attention to detail enhances the connection between the restaurant and its natural surroundings.

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Vancouver Tall Challenge: Building Higher Downtown

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Competition organisers

The Vancouver Tall Challenge: Building Higher Downtown is an international architecture competition organized by Buildner in collaboration with the City of Vancouver and the University of British Columbia’s School of Architecture and Landscape Architecture (SALA). The competition invites architects, designers, planners, and creative thinkers to explore innovative approaches to tall buildings in Vancouver’s downtown core, focusing on sustainability, livability, urban density, public space, and the city’s strong connection to nature. As Vancouver continues to grow, participants are challenged to rethink how vertical development can enhance urban life and contribute to a more vibrant, inclusive, and resilient city identity.

The competition offers a total prize fund of $15,000 CAD, with winning proposals selected by an international jury of architects, planners, academics, and city-building professionals. Key dates include the final registration deadline on October 29, 2026, submission deadline on November 30, 2026, and winners announcement on January 26, 2027. Full competition details, requirements, and registration information are available at architecturecompetitions.com/VancouverTallChallenge

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