3D Printed Bridge — MX3D

Biological model: Nature's bottom-up building processes

Company: MX3D

A 3D printed steel bridge developed by MX3D that uses nature's bottom-up construction principles to build complex structures additively.

The challenge

Infrastructure construction is waste-intensive, expensive, and time-consuming. Conventional manufacturing requires extensive material removal or complex assembly processes.

Nature's strategy

Natural bottom-up construction processes (coral, shells, mycelium, sedimentary rock)

What was emulated

Additive construction through material deposition, structural efficiency through growth patterns

The innovation

Additive manufacturing of steel structures using 3D printing to build complex infrastructure bottom-up rather than top-down.

Full case study

MX3D developed a 3D printed steel bridge in Amsterdam using principles inspired by nature's bottom-up construction methods. Rather than top-down manufacturing that removes material (subtractive) or assembles pre-made parts, the bridge is built additively - material is deposited layer by layer to create the final structure. This mimics how natural systems like coral reefs, shells, and mycelium networks build structures through incremental material deposition. The approach reduces material waste, enables locally-appropriate design, and demonstrates the potential of additive manufacturing for infrastructure.