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Published on: January 20, 2019
Surface slope effects on shingling frequency and postural balance in a simulated roofing task
1Department of Occupational and Environmental Safety & Health, University of Wisconsin-Whitewater, Whitewater, WI 53190-1790, USA. chois@uww.edu
Ergonomics
|March 4, 2008
Summary
Roof slope significantly impacts shingling work. Steeper slopes reduce acceptable work frequency and trunk motion but increase postural sway, highlighting the need for safety measures during adaptation periods.
Area of Science:
- Occupational Ergonomics
- Biomechanics
- Construction Safety
Background:
- Roof shingling is physically demanding and poses fall risks.
- Understanding biomechanical responses to varying surface slopes is crucial for worker safety.
Purpose of the Study:
- To examine how different surface slopes affect the maximum acceptable roof shingling frequency in males.
- To compare psychophysical shingling frequency with postural sway and trunk motion.
- To identify ergonomic risks associated with roof slope variations.
Main Methods:
- Simulated roof-shingling task performed by male participants on slopes of 18, 26, and 34 degrees.
- Measurement of maximum acceptable shingling frequency (psychophysical response).
- Assessment of postural sway and trunk motion during the task.
Main Results:
- Maximum acceptable shingling frequency and trunk motion significantly decreased as slope increased.
- Postural sway significantly increased with increasing surface slope.
- Greater postural sway was observed in the initial phase of work on steeper slopes, suggesting an adaptation period.
Conclusions:
- Increased roof slope negatively impacts work capacity and stability.
- Workers may require an adaptation period to compensate for balance loss on slopes.
- Findings can inform improved work practices and safety protocols to reduce fall risks in roofing construction.
