IAAC - Institute for advanced architecture of Catalonia - Barcelona

Large Scale 3D Printing


World's first 3D-printed pedestrian bridge in Spain

The first pedestrian, 3D printed bridge in the world was inaugurated on December 14th in the urban park of Castilla-La Mancha in Alcobendas, Madrid.

The Institute for Advanced Architecture of Catalonia (IAAC) was in charge of the architectural design of the bridge, which has a total length of 12 meters and a width of 1.75 meters and is printed in micro-reinforced concrete.

With the design of the bridge printed in 3D, the Institute for Advanced Architecture of Catalonia remains committed to innovation and becomes a global partner in the use of large-scale 3D printing. The 3D printed footbridge of Alcobendas represents a milestone for the construction sector at international level, since to date, this technology has not been applied in the field of civil engineering.

The 3D printed bridge, which reflects the complexities of nature’s forms, was developed through parametric design, which allows optimising the distribution of materials to minimise the amount of waste by recycling the raw material during manufacture. The computational design also allows maximising the structural performance, being able to dispose of the material only where it is needed, with total freedom of forms, maintaining the porosity thanks to the application of generative algorithms and challenging the traditional techniques of construction.

In addition, the design responds to the challenges posed by the legislation, being implemented in a public space: anyone can now cross the bridge, which will be installed in Alcobendas as an urban infrastructure integrated into the park.

The executive project, led by ACCIONA, was developed by a multidisciplinary team of architects, mechanical engineers, structural engineers and representatives of the municipal administration, among them Enrico Dini, an expert inventor of large-scale 3D manufacturing and IAAC collaborator.

IAAC: 15 years researching on large-scale 3D printing

3D printing has been extensively researched from different disciplines, but it has focused especially on the small scale. It is for this reason that the Institute for Advanced Architecture of Catalonia (IAAC) is trying to bring this new manufacturing technique to the architectural scale for more than 15 years.

Alcobendas City Council
Design Team:
Jayant Khanuja
Construction Company:
In collaboration with
D-Shape – Enrico Dini

World's first 3d printed bridge
3D Printed Bridge