Entry and Precision

Entry and Precision

Bringing the helical staircase into the building was a logistical and design achievement. From the very start we defined the opening in the floor slab and based all staircase component dimensions on that. In our factory in Barneveld the curved balustrade panels and pre‑assembled tread sections were manufactured to the exact size required. On site the pieces dropped into place with no need for adjustment or retrofit. The precision of off‑site fabrication met the preparation on site.

Mathematical Geometry

The staircase’s geometry is rooted in a mathematical logic drawn from the proportions of a logarithmic spiral. Seen from above the treads fan out in a controlled radial pattern. In production we adjusted each tread’s rotation and taper so that tread depth and comfort remain consistent as the stair rises. The underlying line drawing reveals the order beneath the form. This design bridges sculptural effect and ergonomic precision.

Execution and Material Statement

The execution brings together planning theory and craftsmanship. The steel structure is clad in wenge facing and finished in a warm bronze tone using EePaint. Within the historic former school building the staircase makes a sculptural statement. It carries new‐build precision yet honours the architecture’s past. The textured soffit underside of the stair and smooth outer surfaces of the balustrade demonstrate material subtlety and technical mastery. This stair connects more than floors. It connects eras.