Floor height: 10′ (3048mm）

Step Qty: 15+1 (final step is lower than floor )

Riser: 7.5” (190.5mm)

Stairs diameter : Exterior R3334mm (131.26”) Interior R2154mm (84.80”)

Stairs width: 1180mm (46.46”)

Stairs Stringer :12mm steel plate,Black

Tread support: 8mm with nosing