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Achieving Affordable Housing in Record Time Without Compromising Quality

Grænaborg 2 - Residential Complex in Vogar

Location : Vogar, Iceland

Date of completion : Jan – 2022

Building System : Cold-formed steel structure + Prefabricated wall panels

Building Area: 1,450 m²

Client : Midfielder LTD – Brix Houses EHF.

With a total built-up area of 1,450 m² and a strategic location near Keflavík, Iceland, the Grænaborg 2 Residential Complex in Vogar was developed to address one of Europe’s most pressing housing challenges: delivering affordable homes with rapid construction timelines, without compromising on quality, safety, or sustainability.

Beyond economic and scheduling constraints, the project faced significant site-specific environmental challenges. Located in one of the world’s most seismically active regions, the development is also exposed to extreme weather conditions, with wind speeds reaching up to 120 km/h during certain periods of the year.

In response, the project adopts a Cold-Formed Steel structural system, demonstrating how innovative steel construction technologies can redefine residential development in seismic and harsh-climate environments. This approach enables high structural performance and resilience while maintaining cost efficiency, construction precision, and strict adherence to demanding project timelines.

The Challenge: How Can Affordable Housing Be Delivered Through Rapid Prefabricated Steel Construction in Just 95 Days?

Iceland is located directly on the Mid-Atlantic Ridge, one of the most seismically active fault zones on Earth, where the North American and Eurasian tectonic plates converge. As a result, seismic resistance is not merely a desirable feature, but an essential requirement for any construction project in the country.

For the community of Vogar, the demand for high-quality residential spaces capable of withstanding seismic activity—while being delivered rapidly and within a constrained budget—posed a complex architectural and engineering challenge.

From the early stages of development, it became clear that conventional construction methods would be too slow, costly, and structurally inefficient in seismic conditions. A solution was needed that could combine affordable housing, fast-track construction, and exceptional structural performance under seismic loads.

The answer lay in adopting advanced Cold-Formed Steel structural systems paired with engineered prefabricated wall assemblies. These systems were specifically designed to achieve an optimal balance between:

  • Thermal, acoustic, and moisture insulation
  • Resistance to humidity and condensation
  • Durable mechanical cladding systems
  • Controlled and continuous ventilation

This integrated approach enabled the project to achieve high levels of structural resilience, sustainability, and indoor comfort, while completing construction within an exceptional timeframe of just 95 days.

Why Cold-Formed Steel Is the Optimal Choice for Seismic Zones

The selection of Cold-Formed Steel (CFS) as the primary structural system was not arbitrary; it was a direct response to Iceland’s highly demanding seismic environment. This system offers a set of unique structural characteristics that make it particularly well-suited for construction along active fault lines.

  1. Structural Ductility and Flexibility
    Unlike conventional systems such as reinforced concrete or steel-reinforced timber structures—which may crack or fail in a brittle manner during earthquakes—cold-formed steel structures are capable of elastic deformation and controlled bending. This ductility allows the structure to absorb seismic energy, sway safely during ground motion, and return to its original position without catastrophic failure.
  2. Exceptional Strength-to-Weight Ratio
    Cold-formed steel provides high structural strength while maintaining a relatively low self-weight. This significantly reduces seismic loads transmitted to the foundations, as lighter buildings experience lower inertial forces during earthquakes—an essential factor in improving overall seismic performance and survivability.
  3. Elastic Memory and Resistance to Repeated Seismic Events
    One of the key advantages of cold-formed steel is its elastic memory, enabling structural members to deform under stress and subsequently recover their original shape. This makes CFS systems highly effective in regions subject to frequent or repeated seismic activity, minimizing cumulative structural damage over time.
  4. Predictable and Reliable Structural Performance
    Due to the consistent and well-defined material properties of steel, cold-formed steel systems allow for highly accurate seismic modeling and engineering calculations. As a result, buildings perform exactly as designed under seismic loading, reducing uncertainty and enhancing occupant safety.

For the Grænaborg 2 Residential Complex, these combined advantages made cold-formed steel the ideal structural solution. The project required affordable housing, accelerated construction timelines, and uncompromised life-safety standards—all within one of the world’s most seismically unpredictable environments.

Unprecedented Speed: From Concept to Completion in Just 95 Days

What truly distinguishes the Grænaborg 2 Residential Project is its exceptional delivery timeline, achieved through an optimized prefabricated construction approach. By executing key phases in parallel rather than sequentially, the project reached full completion in just 95 days.

  1. Design Phase | 20 Days
    Comprehensive architectural designs, structural calculations, and seismic analyses were completed within only 20 days. Advanced Building Information Modeling (BIM) and computational design tools enabled rapid iteration and optimization. Every component was digitally engineered to ensure seamless on-site assembly and strict compliance with Iceland’s seismic building regulations.
  2. Manufacturing Phase | 30 Days (Concurrent with Site Preparation)
    Upon design approval, precision manufacturing commenced in controlled factory environments. Steel components were fabricated, assembled, treated, and quality-tested within 30 days. This **parallel workflow—manufacturing while the site was being prepared—**eliminated traditional sequential delays and proved critical to the project’s accelerated schedule.
  3. On-Site Assembly | 45 Days (Core & Shell)
    The prefabricated steel frame and wall panels were erected at remarkable speed. Within 45 days, the complete structural frame, floor systems, and roof were installed, along with thermal, acoustic, and moisture insulation and all primary seismic load paths. Rapid assembly minimized weather-related risks and labor costs while swiftly securing a fully seismic-resilient structure.
  4. Finishing & Cladding | 60 Days (Partially Overlapping)
    Final interior finishes, building systems, fixtures, and architectural detailing were completed within 60 days. Even at this stage, the precision of the prefabricated steel system delivered efficiencies, as pre-planned fixing points and accurate dimensions significantly reduced on-site adjustments typical of conventional construction.

Overall Timeline: 95 Days
From initial concept to full completion, the project represents a compelling demonstration of the true potential of affordable housing when advanced engineering, industrialized construction, and parallel execution strategies are brought together.

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info@setupspace.co

Address:

Dilovası OSB, 618. Sk., 41455 – Dilovası/Kocaeli, Türkiye

Commercial Agents:

Libya: Bonyaan Prefabricated Buildings, Tripoli

+218 91 – 00 85 777 / mohamed@bonyaan.com.ly
www.bonyaan.com.ly