he Alto Universal Scaffold Stair Unit is an all-aluminium solution for safe, compliant access between levels in scaffolding, that can fit in with the specific site application without the need for a separate stair tower. Each unit covers a range of lift heights and is available with handrail fittings or without, to allow the user to assembly handrails from tube and fitting to suit the particular application. 5 standed models 4 tread (1.0m), 6 tread (1.5m), 9 tread (2.0m), 12 tread (2.5m) & 15 tread (3.0m) Made of corrosion resistant, structural quality aluminium extruded profiles for strength and reliability, the Alto Universal Scaffold Stair is a lightweight, simple and versatile solution to the working scaffolders needs. BS EN 12811-1 Compliant The Alto Universal Scaffold Stair is designed to give scaffolders a cost effective stair access solution with practical, reliable and compliant equipment designed to fit 48mm tube and fitting scaffolding. With this product you can quickly install a fully compliant stair access to your scaffold.