Helical cantilevered staircase commercial Helical cantilevered staircase commercial from Benjamin Friedl Helical cantilevered staircase commercial Cantilevered staircase with central support string in helical shape, all in wood, floating View Website o Helical cantilevered staircase commercial Cantilevered staircase with central support string in helical shape, all in wood, floating View Website Product Design Comment Share R 7 n Benjamin Friedl Designer Treppen und Glastreppen nach Maß Munich, Germany Follow Contact