Terrazzo stairs

As part of the structural design development for the two-storey feature staircase in our refurbishment and extension project Notting Hill Villa, a full-scale mock-up has recently been completed to test the deflection and workmanship of the fully cantilevered reinforced terrazzo treads.
Through careful coordination between the specialist structural engineer, interior designer, Italian terrazzo specialist and ‘Patalab, the deflection has been minimised to only 3mm, whilst managing to maintain the impressively thin 80mm thick tread key to the overall weightlessness of the design. A light bronze balustrade will wrap around and complete the part spiral stair, helping further reduce the deflection through sharing some of the structural load of the cantilever.