Designing with Tensile Structures: FAQs for Architects

Tensile structures have redefined architectural design, offering lightweight yet durable solutions for diverse applications. Whether you’re designing for sports facilities or for industrial use, these structures provide unparalleled versatility and aesthetic appeal. At Collinson Tensile, we understand the unique challenges and opportunities architects face when working with tensile fabric structures. These FAQs aim to answer common questions, ensuring you have the information needed to make informed design decisions.

1. What are tensile structures?

Tensile structures are architectural systems that use tensioned membranes, typically supported by steel, aluminium, or timber frameworks, to create strong yet lightweight designs. These structures rely on tension rather than compression for their stability, enabling innovative forms and expansive spaces with minimal material usage.

Applications include:

• Sports Facilities: Collinson Tensile specialises in covered multi-use sports facilities, where tensile structures provide weather-resistant solutions for year-round use while offering optimal natural lighting and ventilation. For example, a university campus can benefit from a tensile sports facility accommodating multiple activities under one roof.
• Industrial Applications: Tensile structures are ideal for various industrial uses, providing robust, weatherproof environments for large-scale operations:
• Storage Warehouses: Cost-effective and spacious solutions for storing goods, equipment, or raw materials, designed for maximum durability and efficient use of space.
• Bulk Commodity Storage: Perfect for agricultural and industrial clients needing flexible, high-capacity storage for grains, fertilisers, or other dry bulk goods.
• Aircraft Hangars: Lightweight, large-span structures capable of accommodating a range of aircraft sizes while offering protection from the elements.
• Logistics and Transport Shelters: Efficient shelters for loading bays or vehicle maintenance facilities, ensuring operations continue in all weather conditions.

2. What is the footing of a tensile structure?

Footings are critical to the stability of tensile structures. These foundations are designed to anchor the structure securely, counteracting the high tensile forces. Proper footing design ensures safety and longevity, especially for large-span applications.

Footings typically involve reinforced concrete bases designed to distribute loads effectively into the ground. The size and depth of these footings depend on factors like the tensile forces, soil conditions, and the structure’s overall weight. At Collinson Tensile, we ensure footing designs are tailored to the specific site conditions and project requirements.

3. What materials are used in tensile structures?

At Collinson Tensile, we prioritise high-performance materials to ensure durability, structural integrity, and aesthetic appeal.

Structural Framework

We exclusively use steel frames for our tensile structures due to their superior strength, rigidity, and longevity. Steel provides exceptional load-bearing capacity, allowing for large-span structures without interior supports. While aluminium is a common alternative in the industry due to its lightweight properties, we favour steel for its robustness, ideal for projects like sports facilities, transport hubs, and high-end event spaces.

Tensioned Membranes

Our tensioned membranes exclusively use Serge Ferrari composite materials, renowned for their advanced technology and sustainability. Their patented Précontraint technology applies bi-axial tension during manufacturing, resulting in:

• Dimensional Stability: Resistance to deformation ensures consistent appearance and performance.
• Durability: Capable of withstanding extreme weather, with lifespans exceeding 20 years.
• Lightweight Design: Easy to transport and install, reducing energy use.
• Low Maintenance: Dirt-resistant coatings simplify upkeep.

An example is Flexlight Advanced 1202 S2, a Type III membrane designed for sports halls and stadiums. Features include longevity, consistent translucency, flame retardancy, and recyclability. By combining steel frameworks with Serge Ferrari membranes, we deliver high-performing tensile structures tailored to diverse needs.

4. How long do tensile structures last?

Tensile structures deliver long-term value, with lifespans dependent on materials, maintenance, and environmental conditions.

Structural Framework

Steel frames are highly durable and designed to endure decades of use, even in extreme conditions. They provide unparalleled strength and resilience against wear and tear.

Tensioned Membranes

Serge Ferrari membranes last over 20 years, thanks to their advanced composition. Features like UV resistance and bi-axial tensioning prevent sagging, deformation, and environmental wear. Regular cleaning and inspections ensure the structure’s longevity.

Extending Longevity

Factors influencing lifespan include proper installation, environmental conditions, and routine maintenance. At Collinson Tensile, our engineering expertise ensures that all components are designed and assembled for maximum durability.

With proper care, Collinson Tensile structures remain reliable investments for indoor sports & leisure facilities, and industrial applications for decades.

5. What are the design possibilities with tensile structures?

Tensile structures offer unmatched flexibility in design, making them ideal for various sports, leisure, and industrial applications.

Sports and Leisure Applications

• Covered Multi-Sport Facilities: Year-round protection for sports like football, rugby, and tennis. Large-span steel frameworks eliminate interior supports for unobstructed play areas.
• Sports Halls and Arenas: Tensile roofs diffuse natural light, creating bright and welcoming spaces for athletes and spectators. These designs also reduce energy consumption for artificial lighting.
• Event Pavilions and Leisure Spaces: Semi-permanent or permanent tensile structures deliver both functionality and aesthetic impact, suitable for high-end venues or community spaces.

Industrial Applications

• Warehousing and Storage: Efficient solutions with weatherproof environments that are quick to construct and maintain.
• Workshops and Logistics: Adaptable layouts with durable coverings for equipment maintenance or manufacturing facilities.

Customisation Options

Collinson Tensile structures can be tailored to meet specific requirements:

• Forms: Hyperbolic paraboloids (saddles), cones, or bespoke designs.
• Material Features: Options for translucency, colour, and flame retardancy.
• Integrated Systems: Rainwater management, thermal insulation, and lighting solutions.

6. How sustainable are tensile structures?

Tensile structures are inherently sustainable, using fewer materials and offering energy-efficient benefits.

• Eco-Friendly Materials: Serge Ferrari membranes are durable and recyclable, minimising waste and promoting circular economy practices.
• Efficient Design: Lightweight structures reduce transport energy and installation time. Prefabrication lowers construction impact, including noise and emissions.
• Energy Savings: Natural light diffusion reduces artificial lighting requirements, cutting operational costs and environmental impact.

Collinson Tensile combines innovative design and sustainable materials to deliver eco-friendly structures suited for modern construction needs.

7. Can tensile structures integrate with conventional buildings?

Yes, tensile structures blend seamlessly with traditional architecture. They are often used as canopies, façades, or atrium covers, enhancing functionality while adding aesthetic appeal.

Practical Integrations

Tensile structures can be attached to existing buildings as extensions, providing weatherproof solutions for entrances or courtyards. Their lightweight and adaptable forms make them suitable for both retrofits and new builds.

8. How do tensile structures handle weather conditions?

Collinson Tensile structures are engineered to perform in diverse and extreme climates, ensuring reliable protection against harsh weather.

• Wind Resistance: Steel frameworks and secure tensioning systems withstand high wind speeds.
• Rain and Snow: Integrated drainage systems and enhanced load-bearing capabilities prevent pooling and sagging.
• UV Protection: Serge Ferrari membranes feature UV-resistant coatings to prevent degradation from prolonged sun exposure.

Real-World Example: Shetland Recreational Trust

This sports facility in the Shetland Islands demonstrates our expertise in extreme weather environments. Engineered to handle strong winds and heavy rain, the structure provides a year-round sports venue with excellent natural lighting and weatherproofing.

9. What maintenance is required for tensile structures?

Minimal maintenance is needed. Annual inspections ensure tension remains optimal, and membranes should be cleaned periodically to maintain their appearance and performance. These simple measures help extend the structure’s lifespan.

Collinson Tensile provides maintenance recommendations to ensure every structure maintains peak performance for decades.

10. Are insulated tensile structures an option?

Yes, insulated tensile structures are available. Double-layer membranes with insulation can achieve thermal efficiency (U-values) while offering reduced translucency. These are ideal for applications requiring controlled indoor environments.

11. What is the typical project timeline for a tensile structure?

Collinson Tensile delivers projects efficiently, with the speed of construction being one of our key strengths. Prefabricated components and off-site manufacturing streamline the process, reducing construction time without compromising quality.

Benefits of Speed

• Shorter Installation Period: Tensile structures can be completed much faster than traditional buildings. Even large-scale projects like sports halls can be delivered within months.
• Minimal Disruption: Off-site assembly ensures on-site work is quick and efficient.