Italian studio Disguincio & Co has produced a concept for a spiral staircase with steps made from folds of fibreglass. The Folio Staircase by Pordenone-based practice Disguincio & Co would comprise a ...
This half-scale model of a spiral staircase by American studio Matter Design is made from concrete treads that slip neatly over each other. Above and top: photograph by Brandon Clifford The Helix ...
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