U Step staircase is formed by interlocking two u-shaped square box profile pieces having different dimensions. This way, the staircase becomes self-supporting provided that the dimensions do not exceed a threshold. In-advance preparation of these pieces provides assembly convenience. Packaging and transportation of these straight pieces are also greatly simplified.

Bora YILDIRIM graduated in 1999 from the Department of Interior Architecture and Environmental Design of Hacettepe University in Ankara, Turkey. After working in different design companies, he started the master's program in the same department in 2001 and worked as a research assistant at Istanbul Maltepe University during 2002-2003. He got his master's degree from Hacettepe University in 2004 with his thesis titled "Principles of Daylighting and Artificial Lighting in the Interior Design of Residences." Since then, he worked as a managing interior architect and architectural visualization team leader at some architecture and design companies, where he designed and presented several architectural projects, and gave computer graphics trainings. With a strong passion for learning and research, he went back to his department at Hacettepe University in 2012 to pursue a Ph.D. degree and completed his Ph.D studies in 2016. He currently works in Kirikkale University, Interior Architecture Department as an Associate Professor Bora YILDIRIM combines performance, functionality and ergonomics into aesthetical expressions in his designs. Keen on details, he has been intrigued by the industrial design and works on related designs and concepts in his spare time.

Bora YILDIRIM graduated in 1999 from the Department of Interior Architecture and Environmental Design of Hacettepe University in Ankara, Turkey. After working in different design companies, he started the master's program in the same department in 2001 and worked as a research assistant at Istanbul Maltepe University during 2002-2003. He got his master's degree from Hacettepe University in 2004 with his thesis titled "Principles of Daylighting and Artificial Lighting in the Interior Design of Residences." Since then, he worked as a managing interior architect and architectural visualization team leader at some architecture and design companies, where he designed and presented several architectural projects, and gave computer graphics trainings. With a strong passion for learning and research, he went back to his department at Hacettepe University in 2012 to pursue a Ph.D. degree and completed his Ph.D studies in 2016. He currently works in Kirikkale University, Interior Architecture Department as an Assistant Professor. Bora YILDIRIM combines performance, functionality and ergonomics into aesthetical expressions in his designs.