12-14-2016: the world’s first 3D-printed pedestrian bridge was inaugurated in Spain
The bridge measured 40 ft (12 m) long and 5.7 ft (1.75 m) wide
On December 14, 2016, the Institute of Advanced Architecture of Catalonia (IAAC) unveiled the first-ever 3D-printed pedestrian bridge. The bridge measured 40 ft (12 m) long and 5.7 ft (1.75 m) wide and was installed at Castilla-La Mancha Park in Alcobendas, a park in central Madrid. It consisted of eight interconnected 3D-printed segments.
While the significance of this event in the broader history of 3D printing technology might be debatable, it is unique and remarkable enough to be included as a supplement to today’s historical note. Moreover, although I have not personally visited the bridge, photos available on Google Maps suggest it is still standing and in use by Madrid’s residents (at least as of a year ago, based on the latest images). So we can consider the project successful!
The bridge was created using a unique 3D-printed microscale-reinforced concrete powder fused with thermoplastic polypropylene. It was designed to be load-bearing, which was a rare feature for large-scale 3D-printed constructions at the time.
The bridge’s organic appearance drew inspiration from the works of Antoni Gaudí, the renowned Spanish architect known for merging natural forms with structural innovation. IAAC’s design approach utilized parametric design, a computational method that optimizes material distribution while minimizing waste. By employing generative algorithms, the team created a porous structure, strategically placing material only where necessary to ensure strength and efficiency. This approach reduced waste by recycling raw materials during the production process.
The technical execution of the project was led by Enrico Dini, a pioneer in large-scale 3D printing, who contributed his D-Shape printer technology. This allowed for the precise creation of the bridge’s intricate components, showcasing the potential of additive manufacturing to revolutionize traditional construction techniques.
Source: www.borntoengineer.com