Contemporary Timber and Steel Spiral Stair

This contemporary spiral stair SketchUp model features timber treads and a steel balustrade, suitable for open-plan interior circulation. This spiral staircase design features solid timber treads supported by a central or side-mounted steel stringer, creating a lightweight, sculptural appearance. The balustrade is constructed from slim steel uprights with a continuous timber handrail that follows the helical geometry of the flight. The open-riser configuration enhances light penetration and visual transparency, making it ideal for compact vertical circulation. The structure is designed for a curved or circular floor opening, providing a fluid transition between levels. The materials are clearly defined, with natural wood tones providing a warm contrast to the industrial aesthetic of the steel components.

The download is a 2.8 MB compressed archive containing the native SketchUp (.skp) model. It opens directly in SketchUp; for 3ds Max, Blender or Cinema 4D, import it through a SketchUp importer or convert it first.

In SketchUp, this stair component is best managed using layers or tags to toggle visibility during the modelling process. Users should place the base on the ground floor plane and scale the height to match the specific floor-to-floor dimension of their project. Because it is a modular component, the geometry can be adjusted by editing the group or component definition. Applying custom wood grain and brushed metal textures to the existing faces will ensure seamless integration with the project’s broader material palette and rendering engine.