A Duplex Penthouse Apartment by Pitsou Kedem Architects. The new staircase creates a sense of separation within the interior, while tying in materials, like steel and wood, that you’ll see throughout the space.
Look at the way the metal railing is attached to the stair treads - it continues through & is hidden below the tread.(Estudio GMARQ) http://www.archdaily.com/332607/a-house-estudio-gmarq/511d5261b3fc4b6392000325_a-house-estudio-gmarq_gmarq_-_casa_a_15-jpg/
cabinets, stairs with flip up steps and very narrow stairs. Each step goes up one at a time for each foot. It is sort of spaced so you are putting one foot per step with a steeper step. Very space-saving.