Cube in Cloud: A Model for Sustainable Urban Regeneration Architecture

Across global cities, abandoned rail corridors remain as scars of industrial decline. Once symbols of mobility and economic growth, these infrastructures now sit dormant—fragmenting neighborhoods and creating unsafe urban voids. Cube in Cloud, also titled la fierte de_KMU, proposes a visionary response rooted in Sustainable Urban Regeneration Architecture.

Designed by Chanyoung Kim, 김신홍, 혜진 이, and 동헌 최, the project reimagines obsolete railway infrastructure in Paris as a modular, expandable public platform constructed from recycled materials. Rather than erasing history, the proposal activates it—transforming forgotten rail lines into vibrant ecological and social landscapes.

This intervention demonstrates how adaptive reuse, modular construction, and environmental responsibility can converge to redefine contemporary public space.

Site Context: Recycling the Railway

The project begins with a powerful premise: instead of demolishing abandoned railways, recycle them.

Paris, like many European cities, contains closed rail sections that no longer serve transportation functions. These infrastructural remnants create linear voids within dense urban fabric. Cube in Cloud treats the railway not as a leftover, but as an opportunity—an elevated landscape for culture, performance, markets, and ecological interaction.

By embedding lightweight modular structures along the rail corridor, the design transforms industrial infrastructure into a living public spine.

Modular Architecture as Urban Strategy

At the heart of Cube in Cloud lies a highly adaptable modular system. Each spatial unit is based on standardized dimensions:

• 800mm × 2,500mm × 2,300mm
• 1,600mm × 2,500mm × 2,300mm

These modules allow infinite spatial configurations. The coupling system enables rapid assembly and disassembly, making the architecture scalable and responsive to changing needs.

This modularity reflects the principles of Sustainable Urban Regeneration Architecture:

• Adaptability to multiple contexts
• Efficient use of materials
• Reduced construction waste
• Rapid deployment in urban voids

The result is a flexible public framework that can host exhibitions, workshops, performances, flea markets, rest areas, and cafés.

Programmatic Diversity: Filling the Urban Void

Cube in Cloud transforms the linear railway into a sequence of experiential zones:

1. Experience (Vegetation & Ecological Learning)
2. Experience (Woodworking & Craft)
3. Busking & Performance
4. Facility & Pavilion Spaces
5. Exhibition Platforms
6. Rest Areas & Cafeteria
7. Café & Flea Market

This diversity of programming ensures continuous activation throughout the day and evening. The spatial sequencing promotes natural circulation while encouraging community interaction.

Importantly, the project functions as a CPTED (Crime Prevention Through Environmental Design) strategy. Increased visibility, user diversity, and continuous activity create a safer and more cohesive public environment.

Rather than merely occupying space, Cube in Cloud produces a vibrant architectural ecosystem.

Environmental Responsibility: Architecture as Recycling System

Environmental thinking was prioritized from the outset.

The structure utilizes recycled iron components and materials integrated within existing recycling systems. By designing with recyclable restraint forms, the project minimizes resource extraction and extends material life cycles.

The metal recycling circulation diagram embedded in the proposal illustrates a closed-loop system:

1. Collection of reused materials
2. Sorting and recycling metals
3. Processing
4. Redistribution
5. Fabrication of recycled products

This circular material logic positions the project as a prototype for environmentally conscious public infrastructure.

In addition, the integration of vegetation and open green corridors restores ecological balance within the dense urban context. The central grass strips between modules provide micro-habitats and reinforce the connection between nature and city life.

Aesthetic Identity: Light, Transparency, and Night Activation

The architectural language of Cube in Cloud is intentionally lightweight and transparent. Slim structural frames create elevated platforms that appear to float above the railway—like clouds suspended within the urban canyon.

With a controlled maximum height of 6,900mm, the project maintains visual permeability and accessibility.

At night, integrated neon lighting transforms the modular frames into luminous urban landmarks. The glowing grid defines the spatial boundaries while activating the site after dark. These illuminated structures function both as wayfinding devices and as performance-ready stages.

The result is an architecture that shifts identity between day and night—ecological landscape by daylight, radiant urban installation after sunset.

Expandability and Replicability

Cube in Cloud is not conceived as a singular object but as a replicable system.

Because the modules are standardized and scalable, they can be applied to:

• Other abandoned rail sections
• Underutilized urban corridors
• Industrial voids
• Temporary event infrastructures

The project proposes a model of Sustainable Urban Regeneration Architecture that is exportable across cities facing similar infrastructural decay.

If Paris railways become active public landmarks, they may initiate broader social transformation—encouraging inclusive public participation, cultural exchange, and ecological awareness.

Social Impact: Architecture Beyond Form

Cube in Cloud does more than fill space. It creates opportunity.

By supporting markets, workshops, and performance spaces, the project fosters micro-economies and local craftsmanship. It encourages informal gathering and spontaneous activity.

Through ecological education spaces, it raises awareness about environmental responsibility.

Through modular flexibility, it responds to the uncertainties of contemporary society.

This is architecture not as monument, but as platform.

Cube in Cloud demonstrates how Sustainable Urban Regeneration Architecture can transform obsolete infrastructure into vibrant public landscapes.

By combining recycled materials, modular construction, environmental sensitivity, and social programming, the project redefines how cities can reclaim forgotten spaces.

As cities worldwide confront post-industrial remnants and environmental challenges, Cube in Cloud offers a compelling blueprint: recycle, regenerate, and reconnect.

It is not merely a design for Paris—it is a scalable urban strategy for the future.