From 900 to 1300 mm
From 160 to 245 mm
From 220 to 300 mm
Structure: Double tubolar steel structure laterally fitted under the treads
Treads: Realized like steel trays for containing some materials like marble
Closed riser: Optional
Railing: characterized by monoblade steel posts, 8 rows of reinforcing steel bars and a steel handrail.
The railing doesn’t allow its climbing.