Love how this staircase is inserted in this void.  It’s the work of Webb Yates Engineers in London.  It’s inspired by Do-Ho Suh’s installation at Tate Modern – ‘Staircase III’.

According to the engineers the “stair flights and balustrade panels are formed from 5mm steel plates which were powder-coated to give the distinctive colour and form a durable wearing surface. Lateral loads on the balustrade are resisted by a combination of plate bending and membrane action generated by tension forces in the hanger panels.”

I couldn’t have put it better myself :-)