Designing Chairs For Users With High Body Weight


  • Miloš Hitka Department of Economics, Management and Business, Faculty of Wood Sciences and Technology, Technical University in Zvolen
  • Milan Naď Institute of Applied Informatics, Automation and Mechatronics, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava
  • Nadežda Langová Department of Furniture and Wood Products, Faculty of Wood Sciences and Technology, Technical University in Zvolen
  • Miloš Gejdoš Technical University in Zvolen, Faculty of Forestry, Department of Forest Harvesting, Logistics and Ameliorations
  • Denisa Lizoňová Department of Mathematics and Descriptive Geometry, Faculty of Wood Sciences and Technology, Technical University in Zvolen
  • Maciej Sydor Department of Woodworking and Fundamentals of Machine Design, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences


Weight, Bariatric chair, Chair construction, User weight, Wooden chairs, Designing


The relationship between the functional dimensions of the furniture and a user’s anthropometric dimensions is crucial for safety and functionality. The weight and dimensions of the user's body significantly affect the functional dimensions of the furniture, especially for overweight users. This paper is focused on the concept of chair structural design, which is suitable for bariatric users, including the application of additional reinforcing structural components. Such components are expected to improve the stiffness and strength properties of the chair structure, and it provides the possibilities to a chair design with improved ergonomic parameters. To increase rigidity and reinforce the frame structure of a chair for obese users, the side stretchers, middle braces inserted under seat and armrests are used. The main goal of the different structural designs of chair frames is to minimize internal forces acting in the structural components of the chair. The finite element method (FEM) was used to determine the internal forces and stress-strain state in the structural elements of the chair, starting with the standard design of the chair frame and comparing different design variants. A synergistic effect is obtained, making the bariatric chair durable and ergonomic, without stigmatizing its users.







Research Article or Brief Communication