• Title/Summary/Keyword: working posture

Search Result 252, Processing Time 0.033 seconds

Working Posture Analysis Using OWAS method of Core Wall Construction in High-rise Building (OWAS기법을 활용한 초고층 코어월 공사의 근로자 작업자세 분석)

  • Lee, Junehyuck;Kim, Taehoon;Cho, Hunhee;Kang, Kyung-In
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2016.05a
    • /
    • pp.72-73
    • /
    • 2016
  • Working Posture is an important factor directly connected with quality and productivity of the construction project. In particular, High-rise building construction is required to manage the working posture due to the repetitive task and unfavorable working condition such as high place work, limited space. However existing construction planning of high-rise building construction has a negative effect on the labor's productivity because it is not insufficiently considered for working posture. Therefore the purpose of this study is to suggest a work that needs improvement by analyzing labor's working posture quantitatively using OWAS method. These results would provide the basic information to improve the productivity of the construction project by supporting the construction plan considering the working posture in high-rise building.

  • PDF

Impact of Korean Workers' Experience of Exposure to the Physical Work Factors on Absence

  • Choi, Seo-Yeon;Lee, Seong-Jin
    • Journal of the Korea Society of Computer and Information
    • /
    • v.22 no.6
    • /
    • pp.149-156
    • /
    • 2017
  • In this paper, we propose to enhance a Physical working conditions to decrease absence from work. we demonstrated the correlation of worker's absence with various environmental factors in workplace by surveying 6,962 workers. As result, first, concerning exposure to physical work factors, most of them complained of vibration, and concerning exposure to improper working posture, most of them complained of repetitive arm and hand motions. Second, the absence experience had correlations with age, monthly income, smoking, number of employees, long term working, and shift work, and of the physical factors, hand vibration, noise, high temperature, low temperature and improper working posture had correlations with physical pain posture, movement of people and carrying heavy materials. Third, experience of exposure to hand vibration, noise and low temperature of the physical factors had impact on absence, and of the improper working posture, physical pain posture and carrying heavy stuff had impacts on absence. Through this study, it was found that of the work factors of Korean workers, physical factors and improper working posture had impacts on absence. The results of this study confirmed that physical factors and inappropriate working posture among work factors influenced the absenteeism. Therefore, it is required to improve the work environment regarding physical risk factors and prepare a systematic management plan.

The Study on Selection of human Model for Controllability Evaluation According to Working Postures

  • Kim, Do-Hoon;Park, Sung-Joon;Lim, Young-Jae;Jung, Eui-S.
    • Journal of the Ergonomics Society of Korea
    • /
    • v.31 no.3
    • /
    • pp.437-444
    • /
    • 2012
  • The purpose of this study was to suggest appropriate human model for ergonomic evaluation considering working postures on 3D space. Background: Traditionally extreme design rules have been widely utilized at the stage of designing products. Body size of 5th percentile and 95th percentile in stature has been generally selected for controllability and clearance evaluation, respectively. However, these rules had limitations in reflecting working posture in ergonomic evaluation. Method: In order to define working posture on 3D space, not only sagittal plane but also lateral plane was considered. Kinematic linkage body model was utilized for representation of working posture. By utilizing the anthropometric data of 2,836 South Korean male populations, the point cloud for end points of linkage models was derived. The individuals who were lacking in certain controllability were selected as human models for the evaluation. Result: In case of standing posture it was found that conventional approach is proper for all controllability evaluations. Contrary to standing posture, tall people had less controllability on control location below shoulder point in sitting posture. Conclusion: From the derived proper range on controllability, ergonomic evaluation rule was suggested according to working posture especially in standing and sitting. Application: The results of the study are expected to aid in selection of appropriate human model for ergonomic evaluation and to improve the usability of products and work space.

A Study of Workload Change at Varying Working Posture, Work/Pest Ration and Task Type in an Automobile Assembly Task (자동차 조립작업 시 작업자세, 작업/휴식비율, 작업형태에 따른 작업부하의 변화에 관한 연구)

  • 이준엽;김철홍
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.24 no.69
    • /
    • pp.51-64
    • /
    • 2001
  • A laboratory experiment was conducted to investigate the effects of working posture. work/rest ration, and task type on the physical workload in automobile assembly jobs. Ten healthy male university students participated as subjects in the experiment. East subject performed 18 experimental session with combination of 3 working posture 3 work/rest ratio and 2 task types. To examine the effect of various working conditions on workload, DMG analysis was performed on 4 different muscles in the neck an arm area, Also RPE scale and heart rate were taken as response variables. The result showed that all working conditions considered in the experiment had significant effects on the workload concluding that labor intensity in auto assembly jobs should be adjusted with respect to different levels of working posture, work/rest ratio, and task type. Detailed analysis are presented in the paper.

  • PDF

Ergonomics of Office Seating and Postures

  • Jeong, Byung Yong;Yoon, Ara
    • Journal of the Ergonomics Society of Korea
    • /
    • v.33 no.2
    • /
    • pp.167-174
    • /
    • 2014
  • Objective: This research focuses on the working environment of office workers and aims to propose an ideal seating posture and chair design. Background: Generally, office workers having to seat in a fixed posture for long periods of time tend to suffer from an increased rate of musculoskeletal disorders. Method: The measurement and survey of 123 office workers on their working conditions and literature survey will lead to a suggestion of an ideal seating posture and workstation design theory. Results: Work environment satisfaction appeared low for chair and desks. Work-related pain over the last year was experienced among 47.2% of the respondents in shoulder (34.2%), neck (30.9%). Observation of working posture revealed that only 27.6% of workers utilize backrest during work. Conclusion: Office work embodies many situations where risks of musculoskeletal disorders may be high. Thus, the seated workplace must be set up to allow proper seating posture for workers. Application: The results of this study can be applied as baseline data for preventing musculoskeletal disorders of office workers.

Effects of Working Postures on Headache/Eye Strain in Korean Waged Workers: The 5th Working Condition Survey(2017) (근무자세가 두통/눈의 피로에 미치는 영향: 제5차 2017년 근로환경조사)

  • Kim, You Hyun;Koh, Seokjae;Cho, Kyung Min;Chae, Jinkyeong;Oh, Hyun Jung;Chang, Sei-Jin
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.32 no.2
    • /
    • pp.116-128
    • /
    • 2022
  • Objectives: The aim of this study was to examine the association of working posture with headache/eye strain in Korean waged workers. Methods: Data were collected from the 5th Korean Working Condition Survey. A total of 30,955 workers participated in this study. A four-items of working postures were measured using a 7-point Likert scale, and we categorized them into three groups ('normal', 'moderate', and 'severe') each 4 items. Headache/eye strain were measured using a self-administrative questionnaire ('yes' vs. 'no'). To examine the relationship between the total working postures score and headache/eye strain, we summed a 4-items of working postures. It was categorized into five groups according to the severity of exposures('normal', 'mild', 'moderate', 'severe', and 'very severe'). The multivariate logistic regression analysis was performed using the IBM SPSS(Ver. 25), and a p<.05 was considered significant. Results: The results show that 'fatiguing and painful posture' and 'posture repetitively using hands or arms' were associated with headache/eye strain after controlling for control variables. The total working posture score was positively associated with headache/eye strain. People with higher levels of the total working posture score were more likely to increase the risk of headache/eye strain compared to those of normal(OR: 1.844, 95% CI: 1.549~2.195 for 'mild'; OR: 2.564, 95% CI: 2.152~3.503 for 'moderate'; OR: 4.140, 95% CI: 3.432~4.994 for 'severe'; OR: 7.613, 95% CI: 5.625~10.304 for 'very severe') (p<.05 for trend). Conclusions: These results indicate that inappropriate working postures might play a crucial role in developing headache/eye strain. It is needed to improve the working environment, especially focusing on reducing inappropriate working posture at the organizational level.

A Study on Musculoskeletal Symptom and Pain related to Working Posture of Operation-Room Workers. (수술실 근무자의 업무수행 관련 근골격계 부담정도와 통증에 대한 연구)

  • Kim, Ji-Yeun;Jaung, Ae-Hwa
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.8
    • /
    • pp.2906-2916
    • /
    • 2010
  • Purpose : The purpose of this study was to identify musculoskeletal symptom and pain related working posture with operation-room workers. Methods: The subjects of this study were 73 people who were working from hospital operating-room. A questionnaire consisting of general characteristics, pain symptoms, and pain frequency was given. Objective working posture analysis was done by using REBA after recording moving images in hospital operating-rooms. Results: The result were as follows. The risk level of musculoskeletal symptom related working posture was high, and the management level was at the least 2; 'some management was required for musculoskeletal symptom'. The frequency of pain was 3~4 times/week and the severe pain were experienced from legs, neck, and shoulder. The result of relation of general characteristics and pain were significant variable with sex, age, marital status, weight, past working history, average working time(hr/day), working style, and working department. Conclusion: These results contribute to a better understanding of operation-room workers have high possibility of musculoskeletal disease and are severe musculoskeltal pain related working posture.

Comparison of Three Ergonomic Risk Assessment Methods (OWAS, RULA, and REB A) in Felling and Delimbing Operations (벌도 및 가지제거작업에서 세 가지 인간공학적 위험 평가기법의 비교분석)

  • Cho, Min-Jae;Jeong, Eung-Jin;Oh, Jae-Heun;Han, Sang-Kyun
    • Journal of Korean Society of Forest Science
    • /
    • v.110 no.2
    • /
    • pp.210-216
    • /
    • 2021
  • Musculoskeletal disorders affect workers' safety in most industries, and forest operations are classified as a musculoskeletal burden according to the Occupational Safety and Health Act in South Korea. In particular, felling and delimbing operations are mainly conducted by manpower, and then, it is necessary to evaluate ergonomic risk assessment for safety of felling and delimbing workers. Three ergonomic risk assessment methods, such as Ovako Working posture Analysis System (OWAS), Rapid Upper Limb Assessment (RULA), and Rapid Entire Body Assessment (REBA), are available for assessing exposure to risk factors associated with timber harvesting operations. Here, three ergonomic risk assessment methods were applied to examine ergonomic risk assessments in chainsaw felling and delimbing operations. Additionally, exposure to risk factors in each method was analyzed to propose an optimal working posture in felling and delimbing operations. The risk levels of these operations were evaluated to be highest in the RULA method, followed by the OWAS and REBA methods, and most of the exposed working postures were examined with a low-risk level of two and three without requiring any immediate working posture changes. However, two significant working postures, including the bending posture of the waist and leg in felling operation and standing posture on the fallen trees in delimbing operation, were assessed as the high-risk level and needed immediate working posture changes. Low-risk work levels were examined in the squatting posture for felling operation and the straightened posture of the waist and leg for delimbing operation. Moreover, the slope in felling operation and the tree height in delimbing operation significantly affected risk level assessment of working posture. Therefore, our study supports that felling and delimbing workers must operate with low-risk working postures for safety.

Suggestion of a Method to Assess the Risk Level of Agricultural Works Considering Work Posture and Working Time (작업자세와 작업시간을 고려한 농작업의 인간공학적위험성 평가 방법의 제안)

  • Park, Hee-Sok;Lee, Yun Keun;Kim, Hyocher;Lee, Kyungsuk
    • Journal of the Ergonomics Society of Korea
    • /
    • v.36 no.5
    • /
    • pp.601-607
    • /
    • 2017
  • Objective: A method to assess the risk level of agricultural works considering work posture and working time was suggested, and the method was applied to the major fruit crops. Background: It is not complete to analyze only work postures when assessing risk level of agricultural works. Method: $3{\times}3$ matrix was employed, in which the severity level was taken from the REBA method and exposure level was taken from the working time, using the criteria of caution zone/hazard zone. Results: Among the 5 major fruit crops(apple, pear, grape, peach, persimmon), the highest level of ergonomic risk was found in the apple and pear, while medium level was found in other 3 crops, mainly because the working time was less in the 3 crops. Conclusion: It was found that when assessing the overall ergonomic risk of agricultural works, work posture and working time should be considered at the same time. Application: The suggested method could be applied to other non-cyclic tasks.

Development of Tilting Chair for Maintaining Working Position at Reclined Posture

  • Hyeong, Joon-Ho;Roh, Jong-Ryun;Park, Seong-Bin;Kim, Sayup;Chung, Kyung-Ryul
    • Journal of the Ergonomics Society of Korea
    • /
    • v.33 no.2
    • /
    • pp.155-165
    • /
    • 2014
  • Objective: The aim of this study is to develop an office chair enabling to keep working at reclined sitting posture. Background: Sedentary workers are supposed to change the posture frequently during long hours of sitting. A reclined sitting position has been recommended to reduce disc pressure. But slumped sitting posture caused by the buttock sliding forward without any adjustment of back reclining is commonly observed. The worker seems to have tendency to change the sitting posture maintaining working condition. We assumed the reason to be their hands movement away from the working space when tilting backward. Method: Slide mechanism allowing seat to move forward was designed to maintain the hand position in working space during reclining. A prototype was manufactured and tilting motion was analyzed using motion capture system. Four experiment chairs were tested including the manufactured prototype chair and three other commercial chairs. Results: A backward movements of the hand position were 13.0mm, 101.7mm, 156.1mm and 139.3mm at the prototype chair, compared to chair B, chair C and chair D, respectively. And the movement was remarkably small at the prototype chair. Conclusion: The developed seat sliding chair allows back tilting maintaining hand position at working space. We expect the user tilting back more often than normal tilting chair during seated work. But further investigation is required to figure out the effectiveness of the developed chair using prolonged working hours. Application: The developed office chair directly affects commercialization.