Penthouse Curved Staircase

Helical Stair Technical Specification Stair Riser: 176mm (6.95″) Clear Tread Width:950mm(37.4″) Stair Diameter: 2604mm(102.5″) Glass infill: 12mm(1/2″) Outer Stringer : 40mm(1.57″) Inner Stringer :12mm (1/2″)