A tight spiral in folded steel plate against bare concrete, treads left open and the whole stair coated matte black.

An open-riser flight on a black steel stringer, with thick oak treads and a slim matching balustrade.

A quarter-turn stair in black steel with oak treads and a vertical-bar balustrade carried through to the landing.

An open-riser stair with a full-height glass balustrade, so the flight reads as structure rather than a wall.

An external flight in coated steel, fixed to the wall and detailed to shed water.

A black steel spiral stair rising to a terrace level, with solid treads cantilevered from the central column.