Some buildings look magnificent because of their size. Others feel iconic because of the way they stand, breathe, and interact with the space around them. Indonesia Arena in the Gelora Bung Karno complex belongs to the latter.From a distance, it appears light and effortless. Yet behind its form lies a complex wide-span structure with minimal columns and no visual obstruction. This is where architecture meets material technology. As highlighted in the Indonesia Steel Architecture Award 2024 publication, projects like this demonstrate how modern steel is not only a structural element but also a design expression.Why Stadiums Require Wide-Span Roofs.

Spacious Areas Without Visual Obstruction

Imagine sitting in a stadium stand with your view blocked by columns. The experience disappears. This is why modern stadiums require wide-span structures: unobstructed space, clear visibility, and immersive spectator experience. Steel structures make this possible strong yet visually lightweight.

More Than Just a Cover

Today, a roof is no longer just a protective element. It is an identity. Curves, structural lines, and light reflections on materials all shape a building’s character. Indonesia Arena stands not only as a sports venue but also as a symbol of contemporary urban design.

When Steel Becomes the Language of Architecture

There are clear reasons why steel is the primary choice for stadium projects:

1. Strength for Extreme Spans

Steel has a high strength-to-weight ratio, enabling large structures without excessive supports.

2. Design Flexibility

Curved forms, modular systems, and complex structures can be realized with high precision.

3. Adaptability to Tropical Climate

Modern coated steel materials are designed to withstand heat, rain, and high humidity.

The Role of Design Tools Behind Iconic Roofs

Beyond materials, building planning always begins with imagination. Today, that imagination no longer stops on paper. Architectural design tools have become a space where ideas are tested, questioned, and refined. Through CAD, BIM, and 3D visualization, architects do not simply draw buildings they understand how structures will stand, function, and interact with their surroundings. At this stage, form is no longer just about aesthetics. It is tested through structural simulations, validated for precision, and translated into a buildable system. Interestingly, technology does not make the process rigid. Instead, it opens a dialogue between architects, engineers, contractors, and clients so that every design decision can be understood collectively from the beginning.

The Material Working Behind Iconic Structures

In projects like this, material selection is no longer just a technical decision it becomes a strategic one. This is why COLORBOND® Steel is often the answer for modern architecture today. Interestingly, this material is not a new player. This year, COLORBOND® Steel celebrates its 60th anniversary a long journey as part of BlueScope’s global innovation. Six decades are not just a number, but proof that the material continues to evolve and innovate to meet today’s needs and future building challenges.

This material combines:

• ZINCALUME® steel substrate
• Proprietary paint system
• Performance technology for extreme climates

Technology That Shapes Building Performance

Behind its appearance, advanced technology works quietly.

Thermatech® Technology

Reflects solar radiation and reduces heat entering the building.

Super Polyester Paint System

Maintains color stability and long-term weather resistance.

Clean Technology (Additional Technology)

This technology helps prevent dirt from sticking to the surface.

Dust particles do not easily adhere, resulting in:

• Longer-lasting clean surfaces
• Better building appearance
• Minimal maintenance

COLORBOND® Steel Product Options for Modern Architecture

In modern architecture, every site has unique challenges. That is why COLORBOND® Steel variants function as strategic tools to address different environmental conditions.

1. Coastal Environment Performance (COLORBOND® Steel Ultra)

For projects near coastal areas, the main challenge is seawater corrosion. This variant uses ZINCALUME® steel AZ200 substrate designed for extra durability in aggressive environments.

2. Unlimited Flexibility (COLORBOND® Steel XAL)

For designs that require fluid and organic forms, this variant uses Aluminium Alloy 3105. The material is lightweight and offers excellent natural corrosion resistance, ideal for modern architectural exploration.

3. Timeless Aesthetic (COLORBOND® Steel XPD)

Buildings are long-term portfolios. With PVDF coating systems, this variant offers superior color durability, maintaining a premium and fresh appearance even after years of weather exposure.

4. Performance for Large-Scale Projects (COLORBOND® Steel XRW)

For wide-span buildings or large commercial projects, efficiency is essential. This variant combines Thermatech® Technology for heat reflection and Clean Technology to maintain surface cleanliness and functional performance.

5. Elegant and Subtle Appearance (COLORBOND® Steel Matte Finish)

Sometimes buildings need a more grounded and understated look. With very low gloss, the Matte variant reduces glare while delivering a refined, elegant, and sophisticated visual character.

Beyond Aesthetics: Long-Term Benefits

Material selection is not only about today’s appearance but also future performance.

COLORBOND® Steel offers:

• Corrosion resistance warranty up to 35 years
• Color durability warranty up to 12 years*

*Terms and conditions apply

This makes it a solution that is not only visually appealing but also sustainable.

When Structure, Material, and Imagination Meet

Indonesia Arena is not just a large building.

It is the result of a dialogue between:

• Structural engineering
• Material technology
• Architectural vision

Here, steel is no longer just a structural support.

It becomes part of the story.

And perhaps that is why its roof feels so iconic—not only because it covers space, but because it shapes experience.

FAQ

What makes a stadium roof look iconic?

Wide-span design, unique structural forms, and modern materials make the roof a dominant visual element.

Is steel roofing suitable for tropical climates?

Yes, especially with technologies like Thermatech® and Clean Technology designed for heat, rain, and high humidity conditions.

What are the advantages of COLORBOND® Steel compared to other materials?

High corrosion resistance, color stability, heat-reflective technology, and low maintenance requirements.

What is the function of Clean Technology on roofing?

It prevents dirt from sticking to the surface, keeping it clean and durable over time.

Refrance : 

https://steelarchitecturalaward.com/en/project-honorees/award-2024/