Illustration for article titled Helix concrete spiral staircase by Matter Design

This is definitely not a staircase for those with dogs or small children. Still, I'm really fascinated by this design feat. Offset, interlocking concrete steps automatically spiral as they are stacked on top of each other. Each step is exactly the same, formed in a wooden mold. [Matter Design]

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Illustration for article titled Helix concrete spiral staircase by Matter Design
Illustration for article titled Helix concrete spiral staircase by Matter Design

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