Design Analysis of Foldable Table Armchair for Left-handed User

M.I.A. Osman1, N. Nasir2

1Faculty of Mechanical Engineering, UiTM Shah Alam, Selangor

2School of Mechanical Engineering, College of Engineering, UiTM Shah Alam, Selangor

Page 56 – 67   |   Vol. 6 No. 2 2021   |    Available online on 1 December 2021


The left-handed person is known to have poor body posture and experience discomfort while performing writing activities on the foldable table armchair which is mostly designed for the right-handed population. Poor body postural and discomfort may lead to fatigue and muscle pain. Although many reported findings had discussed product design for the left-handed population, very little information’s on the use of CAE ergonomic analysis embedded in foldable table arm design activities were reported. Thus, the objective of this study is to develop a detailed design of a foldable tabletop chair for left-handed people using computer-aided design (CAD) and to analyse appropriate hand and body posture in relation to the design by using computer-aided engineering (CAE) ergonomic analysis. By using Rapid Upper Limb Assessment (RULA) analysis the postural result of the manikin on the proposed design model shows the highest risk with a score of 6 occurring at the wrist, arm, neck, trunk and leg. The risk on the neck is identified likely due to the proposed design concept not providing any neck support. As for the risk on the arm and other segments of the manikin, further analysis for result improvement can be done by optimizing the manikin sitting position on the chair and the design of the proposed chair. From Finite Element Analysis (FEA), the table was expected to have defects sooner thus a stronger wood type is to be considered than the suggested pine wood. The study concludes that the use of CAE ergonomic analysis could identify potential posture problems in the design stage thus producing better ergonomic product design.


Design, left-handed, CAD, Ergonomics, RULA

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