摘要(英) |
Because iron workers often do their works continuously with
repetitive motions everyday, their limbs are easily overused
over a long period of time to result in the tiredness, soreness
or disorder of the musculoskeletal system and further cumulative
trauma disorders (CTD), all of which will cause the iron worker
such problems as pain, paralysis, loss of consciousness or work
ability decline. This research takes use of the posture
assessment method to analyze the posture of steel bark works in
hopes of finding out the item of operations with higher
frequencies for hazardous posture exposures as a basis of the
related improvement measure for work procedures or the
musculoskeletal protection plan.
This research adopts three methods including Ovako Working
Posture Analyzing System (OWAS), Repaid Entire Body Assessment
(REBA) and Posture, Activity, Tools and Handling (PATH) to
assess the postures of iron workers. Five types of tasks
including constructions of walls, beams, boards, pillars and
stairs, are analyzed. Result shows that the risk level of such
works for the iron-fixing worker, ranked from high to low, is
beams, boards and stairs respectively during eight-hours working
period. Especially, the risk level of beam construction is much
higher than other works. For the iron-fixing works of beams,
boards and stairs, the risk exposure time of such working
postures is 6.5, 6.4 and 6.2 hours respectively, showing that
the whole-day working posture of the iron-fixing worker would be
under the level of hazardous postures all the time if he/she did
two of the above works in a day. Therefore, the iron worker
shall increase his/her rest time or modify his/her rebar
placement procedure to reduce the CTD of his/her muscles and
bones. In future, the information provided by this research can
be used as a basis of the arrangement of rebar placement
operations to prevent the iron worker from any musculoskeletal
injury resulted from hazardous postures. |