Iranian Journal of Ergonomics

Introduction: Due to the deleterious effects of mismatch between body dimensions of students and educational furniture, this study aimed to assess the size of students’ body in Yazd.

Material and Methods: The study population included all high school students in Yazd city. Popliteal height, buttock-popliteal length, elbow rest height, hips width, thighs thickness and scapular elevation were measured in 307 students. Besides, in furniture used in the schools studied, two chairs and two benches that had a greater frequency of analysis were chosen.

Results: The results of the statistical comparisons showed that type 1 furniture, seat width was acceptable for 96.74% and thigh freedom was 100% fit. The type 2 furniture depth for most students was appropriate, and seat width was acceptable for 96.42% of students. Thigh freedom was fit for 100% with a good rating. In type 3 furniture, there was not any parameter with good fit and in type 4 furniture, wide seat width and thigh freedom was desirable.

Conclusions: In general, the furniture conformity with students’ anthropometry was not desirable.

Introduction: Using human data and observing local manufacturers of domestic products for imported furniture seems necessary to design and manufacture sofas with ergonomic indices. This paper uses data from the study of human population. The design process from the perspective of ergonomic furniture and product design consists of ergonomic principles such as shape and posture in the correct state and consideration of parts of body that need cushion for protection.

Methods: In this research, anthropometric data of 150 males and 110 females between the ages of 25 to 35 were measured. The calculations were based on a sample size sofa to gather user evaluation.

Results: After analyzing the measured results of a similar internal investigation using SPSS software and combining them with ergonomic principles, the optimal size sofa measurements with all angles for Iranians adults was calculated and the results were compared with the dimensions of the furniture.

Conclusions: Seat height and backrest height and width, respectively 37, 57 and 62 cm, the angle of 105 degrees between the seat and the back, and the slope of 5 degrees for the seat surface are suggested as the standard.