Ploko the Retractable Step Stool

Ploko is a school project that my partner Alex and I developed. Our objective was to design a two-step stool with the given materials. With a focus on creating a stool for individuals living in smaller spaces, we designed a retractable step stool that not only saves space but also portrays a modern and playful aesthetic.

2' x 4' x 3/4" sheet of plywood

2' x 2' block of walnut wood

Sandpaper (various grits)

Wooden dowel

Wood glue

Polyurethane coat

Walnut wood stain

CNC machine, 1/4" bit

Ploko began as a simple concept: "How can we develop a step stool that saves space while also keeping good design?" This question initiated a process with many sketches, models, and conversations. For the overall design, we aimed for a playful and modern aesthetic. We experimented with various curves, angles, and shapes.

Through further development, we discovered that incorporating a mix of curves introduced a more playful and dynamic design. These initial iterations and concepts became the backbone for what Ploko turned out to be.

As we developed Ploko, we created physical test models to explore different design languages and aesthetics.

Using a dowel pull system, we discovered a way for Ploko to retract smoothly by pulling up and out. We experimented with different elevations and dowel sizes to provide an effortless user experience while also keeping in mind the space-saving functionality. We also incorporated an ergonomic walnut wood handle on the sides, making it convenient to use while complimenting the overall design.

Initially, our models felt stiff and had a rigid, rectangular design which was not what we envisioned. But through many iterations and concepts, we were one step closer to developing a design we could bring to life.

As we developed our final design, we used Fusion360 to create 3D models to help us visualize what Ploko would look like. We assembled our step stool by using a series of joints and holes, eliminating the need for screws and bolts. By developing orthographic drawings, a detailed layout, and an exploded view, we were able to develop Ploko's design and functionality.

Using a CNC, we were able to cut out our pieces for Ploko. We started by sanding the surfaces with an electric sander for efficient and precise smoothness of the step stool. We then hand sanded the rough edges as well as the inner parts of Ploko to refine our step stool.

While assembling Ploko, we had to carefully plan out the order of each part, as we did not want to interfere with the dowel system function. Making sure each part was assembled, we used a clamp to ensure the glue dried properly.

Our final model turned out with the result we envisioned. A playful yet modern essence with a smooth and efficient function! We further experimented with different renderings and settings to broaden the limits of what Ploko could be in different colors and environments. Although there are things that could further be improved, Alex and I feel happy with our hard work developing Ploko!