Industrial Style Renovation / A factory in Umbria, Italy is transformed into an inviting home by designer Paola Navone. / The upper level of the space is accessed via a slender stair with reclaimed-wood treads.
Some Unusual But Unique Ladder From Around The World
great photo of alternating tread staircase in Lake Shore Drive House by Wheeler Kearns Architects, Chicago (Step Stairs Trips)
Wonderful Interior of Industrial Loft Apartment in Kiev by Studio Group : Clean and Chic White Floating Open Staircase.