Rashid Heidarimoghadam, Majid Motamedzade, Ghodratollah Roshanaei, Rasoul Ahmadi,
Volume 2, Issue 1 (6-2014)
Abstract
Match between school furniture dimensions and children’s anthropometric dimentions in male elementary schools. Rashid Heidari Moghaddam1, Rasoul Ahmadi2 , Majid Motamedzade3, Ghodratollah Roshanaie4 stract: Introduction: Given the important role of appropriate furniture in the posture of the students and that non ergonomic furniture can produce uncomfortable posture, low back pain, neck pain, lack of concentration and discomfort, therefore, this study examine match between school furniture dimensions and children’s anthropometric dimensions in male elementary schools in Hamadan city. Materials and Methods: In this study 600 children have been studied. Their weight and height and their anthropometric dimensions included shoulder height, elbow height, knee height, popliteal height, popliteal-bottock length and hip breadth have been measured. Then, the fitness between current furniture's dimensions and calculated ergonomic dimensions have compared. Results: : Findings showed that dimensions of available furniture included seat height, seat depth, seat width, back rest height, desk height, underneath desk height and anthropometric dimensions of students was not matched. This study has shown that by increasing the seat depth and decreasing the seat height in new designs, they have relatively improved in compare with the old designs. Conclusion: Available school furniture dimensions in Hamadan elementary schools are not appropriate for most students and induce postural discomfort and musculoskeletal disorders. Key words: Ergonomics, Anthropometrics, Design, Furniture 1- Department of Ergonomics, Faculty of Health and Medical Sciences Research Center, School of Public Health. Hamadan University of Medical Science, Hamedan, Iran. 2- Corresponding author, Ergonomics graduate student, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran. 3- Professor, Department of Occupational Hygiene, School of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran. 4- Roshanaei, Ghodratollah, Department of Biostatistics and Epidemiology. Modeling of Noncommunicable diseases Research center, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
Mohammad Amin Mououdi, Seyed Noroddin Mousavinasab, Seyed Mohammad Reza Gramian, Jafar Akbari,
Volume 4, Issue 1 (6-2016)
Abstract
Introduction: Introduction: Inappropriate sizes of school furniture and the deformation of children’s bodies is one of the issues of concern in the world. The aim of this study was the evaluation of anthropometry of primary students aged 6-12 years in Mazandaran, Iran and the design of school furniture based on the anthropometric criteria of the students.
Methods: In this cross-sectional study, 18 anthropometric dimensions of 2336 boys and girls aged 6-12 years in 2014-2015 were measured. To collect data, anthropometric chair, camera and camera stand, and Anthropometric photo graphical software were used. After determining the anthropometric dimensions, ergonomic school furniture was designed.
Results: Average, minimum, maximum, standard deviation, median and percentile value of 2.5 to 97.5 of the anthropometric dimensions of students were calculated. The results showed that gender had no effect on the popliteal height in the age groups of 6 to 7 and 7 to 8, but age had effects on popliteal height (P < 0.001). In the age groups of 8 to 9 and 9 to 10 years and also the age groups of 10 to 11 and 11 to 12 years both gender and age had effects on popliteal height (P < 0.001).
Conclusions: The results showed that by eliminating the effects of gender, 16.2 mm popliteal height increased per year. It was also found that after eliminating the effects of age, popliteal height increased 20.39 mm more in girls than in boys. Until the age of puberty, the anthropometric dimensions in girls increased more than in boys. The dimensions of ergonomics tables and chairs for students were designed in three sizes.
Mohammad Ghofrani, Majid Motamedzade, Mohammad Reza Aghaie, Zahra Mohammad Moradi,
Volume 7, Issue 3 (11-2019)
Abstract
Background and Objectives: The statics and actions of people during daily activities plays a major role in the physical and mental health and dynamics of the community. Given that humans deal with different things in a day, it is necessary that they are adapted to his features of body. The main goal of this study is to design and construct tables and ergonomic chairs for cartography, in accordance with the physical dimensions of students.
Methods: In this research, one of the most used educational furniture, namely cartographic table and chairs, has been studied. After examining the satisfaction of this furniture, for ergonomic review and design in accordance with anthropometric dimensions, physical features of 160 students of art and 40 students of a technical and vocational school were measured. Then data was analyzed by SPSS 18 software.
Results: According to the results, about 70 percent of the students did not feel comfortable with the features of former chair and table, except for the length of the thigh. There was no significant difference between the different educational foundations in the vocational schools and finally, with the help of tonality features, the drawing table and chair were designed which except for the height of the sitting space, in other indices, there was a 100% correlation with the dimensions of the student's body.
Conclusion: In this study, there was a lot of dissatisfaction among students due to the lack of matching these educational materials with their physical dimensions which has caused physical, mental and psychological damage and poor quality of education. At the end of the study, through ergonomic design, matters of satisfaction, sustainability and reduced production costs and also the reasons for students' dissatisfaction with the drawing table and chairs is presented.
Mohammad Sadegh Sohrabi, Mehrdad Anbarian,
Volume 7, Issue 4 (2-2020)
Abstract
Background and Objectives: Using anthropometric characteristics in the ergonomic design of workstations can be useful in the prevention and reduction of musculoskeletal discomfort and in office-work environments. The purpose of this study was to determine the anthropometric dimensions of Hormozgan province gas department staff to design desks and chairs for computer work based workstations.
Methods: This is a descriptive-analytical study for measuring 36 anthropometric variables of 121 Hormozgan province gas company staff selected by cluster random method. After collecting anthropometric data considering ergonomic design criteria, dimensions of desk and office chairs are designed.
Results: Participants were 80.2% male and 19.8% female with a mean age of 35.11 and a standard deviation of 6.6 between 25 and 59 years. The mean and standard deviation of height measured was 170.7 and 8.06 cm, respectively. Anthropometric results are shown separately by gender and percentile in the tables. Dimensions of chair and office desk are designed based on obtained data.
Conclusion: The presented anthropometric desks can be used in future studies and designs. Also, the dimensional characteristics of the furniture provided can be a practical guide for designing and manufacturing office workstations.
Hossein Manouchehri, Payam Moradpour, Mohammad Amin Mououdi, Ebrahim Aga-Rafiei,
Volume 8, Issue 3 (10-2020)
Abstract
Background and Aim: A well-designed desk and chair, in addition to proper learning, can prevent changes in the user's physical form. Therefore, this study aimed to determine the anthropometric characteristics of students in the College of Agriculture and Natural Resources located at the University of Tehran to design an ergonomic table and chair.
Methods: In this research, 18 anthropometric characteristics including the popliteal height, knee height, shoulder height, eye height, sitting height, elbow support height, elbow height, knotted elbow length, hip-popliteal length, hip-knee length, thigh thickness, abdominal depth, chest depth, hip width, shoulder width, the transverse width of the elbows, height, and as well as weight for 260 students (130 girls and 130 boys) aged 18 to 35 years were investigated. To collect data, an anthropometric chamber and chair were used. Finally, according to the measured physical dimensions of the students, the Dimensions of ergonomic table and chair were calculated and designed according to the INSO 9697-1 standard.
Results: Anthropometric dimensions of students were obtained through mean, minimum, maximum, standard deviation, mean, and the percentile value of 2.5 to 97.5 using SPSS version 20 software. The results showed that the age of the user does not have a significant effect on the size of the table and the chair. Also, the results showed that there was a significant difference in popliteal height between girls and boys.
Conclusions: Considering the difference in dimensions between female and male students, it was found that the popliteal height in the percentile of 5 for boys is 4 cm more than girls. Therefore, using measured anthropometric characteristics, the dimensions of the chair and table ergonomics were designed in two sizes.
Anooshe Fazeli, Hassan Ghasembeygi, Mohammad Ghofrani,
Volume 9, Issue 1 (4-2021)
Abstract
Background and Objectives: During the past times people have used furniture as today. Along with the social welfare development and the importance of manufacturing efficiency, the importance of ergonomics and standardization in furniture became very clear so that, today it is well-known that not considering human factors in furniture manufacturing causes much human health problems. Due to the importance of furniture standardization, the present study was conducted to investigate the use of standards in furniture manufacturing units in Tehran province.
Methods: In this study, cluster sampling was performed and questionnaires were distributed among experienced manufacturers of sixty furniture manufacturing units. Statistical analysis was performed using One sample student t-test and Friedman test in SPSS 18 software.
Results: Results revealed that there was a significant difference between the indices mean and the hypothesized mean of the population. Furniture manufacturers believed that the governmental and nongovernmental institutions have appeared weak on updating furniture standards and making manufacturers familiar with standards. From their point of view, consumers have shown a great trend to buy standard and ergonomic furniture. Manufacturers also have largely tended so much to use standards and national standards conformed by international standards.
Conclusion: The manufacturing of standard furniture increases the consumer interest to buy furniture and it increases the consumer satisfaction. The high quality of imported raw materials makes furniture competitive and it causes coordination with international standards and it can assure the successful export of furniture in Iran. Successful furniture manufacturing will depend on realization of all indices mentioned in the present study.
