Data-Driven Tower
Form follows climate: a 42-story tower shaped by wind, sun, and view corridors.
Traditional tower design starts with a floor plate and extrudes vertically. This project inverts the process: the form emerges from environmental data.
We analyzed 10 years of Istanbul microclimate data to create a 3D performance envelope. The tower's rotation, setbacks, and facade porosity are direct responses to prevailing winds, solar radiation, and view corridors to the Bosphorus.
Design a 42-story mixed-use tower that achieves LEED Platinum without active facade systems, while maximizing rentable area and premium views.
Design Intent
Form does not follow function. Form follows data. Wind speed, solar radiation, view corridors: the building is shaped by the forces that will act on it for the next century.
Research-Driven Design
Solar Radiation Mapping
Using Ladybug, we mapped annual cumulative solar radiation (kWh/m²) across all facade surfaces. The south facade receives 1,420 kWh/m²; the north receives 380 kWh/m². This 3.7× difference informed our variable solid-to-window ratio (SWR) strategy.
Parametric Panel Generation
A Grasshopper script (now part of FraktalMCP examples) generated 3,472 unique panel variations. Key constraint: all panels share the same outer frame (1.2m × 2.4m) to reduce fabrication tooling costs; only the inner aperture varies. Cost premium stayed at 12%.
AI-Assisted Massing
Using our AI Form Finding methodology, we tested 48 massing variants in 2 days: replacing a typical 2-week manual process. The final massing (twisted floor plates, 3° rotation per floor) emerged from the trade-off between solar self-shading and structural efficiency.
Wind Comfort CFD
CFD analysis (OpenFOAM) identified downwash zones at the northwest corner. We mitigated this by adding a 4m porous screen canopy at ground level and adjusting podium geometry to redirect airflow.
Design Process
Data Collection
2 months10 years of Istanbul microclimate data aggregated: wind roses, solar radiation maps, temperature humidity profiles, view corridor mapping.
Performance Envelope
3 weeks3D performance envelope generated from environmental data, defining optimal orientation, setbacks, and porosity for each floor.
AI Massing
2 weeks48 massing variants tested in 2 days using AI Form Finding methodology. Final form: twisted floor plates with 3-degree rotation per floor.
Facade Engineering
4 months3,472 unique panel variations generated within standardized 1.2m x 2.4m frame. Wind comfort CFD validation at ground level.
Technical Data
Material Palette
High-Performance Glass
Variable solid-to-window ratio facade: south 40% glass, north 70% glass, responding to 3.7x solar radiation difference.
Weathering Steel
Cor-Ten cladding on opaque panels develops protective patina, reducing maintenance cycles over 25-year lifespan.
Perforated Aluminum
4m porous screen canopy at ground level mitigates wind downwash at northwest corner identified in CFD analysis.
Exposed Concrete Core
Thermal mass strategy for the structural core reduces peak cooling loads through passive temperature regulation.
Performance Metrics
Environmental Performance
Before & After Our Analysis
Uniform glass curtain wall
Climate-responsive parametric facade
10 years of Istanbul microclimate data shaped a variable solid-to-window ratio facade: 40% glass on the sun-blasted south face, 70% on the cooler north. 3,472 unique panels within a standardized frame, at only 12% cost premium.
Conventional extruded tower
Data-driven twisted massing
AI-assisted massing tested 48 variants in 2 days. The final form twists 3 degrees per floor, balancing solar self-shading against structural efficiency for a 32% energy reduction versus code baseline.
The twisted form increases structural steel by 18%. Offset by 25-year energy savings and rental premium.
Instead of a generic glass tower, we received a building that performs. The data-driven approach gave us confidence in every design decision.
Click to enlarge
From Research to Product
Istanbul, Turkey
Confidential
- Fraktal
- Structural: Arup (consultant)
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