Analysis of transport workers’ postures in the loading process of manual material handling activities by using the photogrammetric method

Abstract

This research was conducted on the loading process of manual material handling of cup mineral water activity at PT. PA, Aceh Besar, Indonesia. With samples of 12 transport workers, the observed loading activity includes the position of lifting, walking, and loading. The loading process is done manually from the warehouse into the truck. This work is done continuously by a transport worker with each transported load reaching 48 kilograms. In a one-time loading process, a transport worker performs as many as 33 trips and the timing for each transport loading process is 20 seconds. With the work done continuously and the loads transported are weighty; therefore there are risks of experiencing musculoskeletal disorders by the transport workers. Thus, questionnaires, interviews, and observations were used as instruments to obtain data. Calculations were further conducted to analyze the postures of transport workers by using the Photogrammetric Method. The results show that the moment force calculation at L5/S1 is greatest in the position of lifting the load at 5.756,81 N; meanwhile, the NIOSH provision is 3,400 N for a normal lift limit. Hence, the solutions proposed to this problem are to reduce the load to 24 kilograms/loading and the utilization of the trolley.

Untitled

“…Hal ini dapat diketahui dari postur tubuh pekerja ketika melakukan gerakan pekerjaannya. [5] Beberapa gerakan postur tubuh yang tidak biasa akan dapat menimbulkan keluhan dan risiko kesehatan. Keluhan yang sering ditimbulkan adalah keluhan Musculoskeletal Disorders (MSDs).…”

Analyzing the Vibration Exposure to the Safety and Health at Workplace: A Case in the Urea Granulation Unit of the Fertilizer Factory

“…Previous study by Hasanuddin et al [20] that analyze the biomechanical posture assessment using NBM survey stated that labors need a forceful performance and an improvement of the work system at the same time to reduce risk and injury while performing their tasks and duty. In other cases which labors experience carrying heavy loads regularly, the musculoskeletal complaints may leads to severe back pain [21]. Therefore, Kroemer [22] suggests industries to consider body dimensions to allow safe limit for carrying out loads.…”

Manual material handling analysis using biomechanics at repair department workers

“…This is exacerbated by the lack of knowledge of workers and some employers ignore the job risks of their employees. In addition, there are many manual material handling activities that exceed the recommended lifting limits [1].…”

“…Physical loads are the effect of input forces during material handling activities and from the interaction of material handling equipment with material [18]. Other researchers measured workload on the activity of loading mineral water cups [1]. The loading process is done manually from the warehouse into the truck.…”