Rock’n School Stool

An ergonomic drafting stool made to pivot the the hips forward during work and rock’n back when its time to relax.

Parti | Lower back pain caused by improper posture and the mismatched dimensions of stools to desks lead to the development of the Rock’n School Stool. When working at their desk, students either appeared like toddlers reaching for a counter top, or a giant laboring over a coffee table. The stools were either too short or too tall for the drafting desk. As a result, the student’s contorted their posture to compensate and led to back and shoulder problems. Despondent of this condition I chose to make my own stool.

Process | From the beginning of the process; human proportions and ergonomic design were essential in the stools development. From the curve of the spine to possible foot placement, the chair acts as a framework for good posture.  When working; the lower rockers pivot the seat forward which in turn rotates the hips- straightening the spine. A lower foot bar acts as one of two placements for the feet to rest, while The weight of the thighs holds the stool forward with the arm rests back from the student’s workspace. While at rest, the reclined stool supports the student’s lower lumbar with the back rest. The arm rests sit at a comfortable level with the shoulders and a foot bar on the drafting desks act to brace the stool’s position. Although the stool does not have a cushion the change in posture promotes circulation and eases tension that is normally associated with working at length on a computer or drafting.

Solution | The construction of the stool is composed of back walnut, curled maple and ash. Although the arm rests, rockers and supports appear to be a laminated plywood, they are in fact a modified kerf cut and steam bent members formed around a CNC fabricated form. The seat and back rest are CNC profile cuts connected with open mortise and tenon wedge joints. All other joints are either blind mortise and tenon wedge joints or open mortise and tenon joints. No screws, nails or metal fasteners were permitted in my design because I feel their use violate many of the natural properties of wood.

See its construction here.