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Floating UHPC stair, private residence
A spiral stair comes out and a cantilevered UHPC stair goes in. The finished stair stays under wraps until handover.
- Element
- Cantilevered stair treads
- Material
- UHPC
- Tread finish
- Marble, granite, porcelain or epoxy
- Status
- Under construction

Before

After, in progress. Revealed at handover.
What is changing
The house had a closed spiral stair. It is being replaced with separate cantilevered treads, so each step reads as one floating slab and the stairwell opens up.
Why UHPC
A floating tread is held at one end only, so it has to be slim and very strong at the same time. UHPC is far denser and stronger than ordinary concrete, which is what makes a tread like this possible.
Keep looking
Let’s cast something.
Any size, any finish, and one-off pieces are welcome.
Send a drawing on WhatsApp- Phone
- +251 983 388 315
- Phone
- +251 966 709 080
- TikTok
- @utopia.composites
- Workshop
- Figa, Noah Real Estate, Addis Ababa
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