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Assessing Work-Related Risk Factors on Low Back Disorders among Roofing Workers.

Di Wang1, Fei Dai2, Xiaopeng Ning3

  • 1Dept. of Civil and Environmental Engineering, West Virginia Univ., P.O. Box 6103, Morgantown, WV 26506. dnwang@mix.wvu.edu.

Journal of Construction Engineering and Management
|April 6, 2019
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Summary

Roofers face high risks of low back disorders (LBDs). This study identifies specific roofing tasks and postures that increase LBD risk, informing safety guidelines for construction professionals.

Keywords:
Construction safetyErgonomic assessmentsExperimental studiesLow back painsMusculoskeletal disordersNonfatal injuriesRisk evaluation

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Area of Science:

  • Occupational Health
  • Ergonomics
  • Biomechanics

Background:

  • Low back disorders (LBDs) are a primary nonfatal injury in the construction industry, particularly affecting roofers.
  • Existing biomechanical models for LBD risk assessment are not suitable for roofing work due to unique postural variations and sloped surfaces.

Purpose of the Study:

  • To investigate the relationship between roofing-specific work factors and LBD risk.
  • To identify high-risk conditions for LBD development among roofers.

Main Methods:

  • A laboratory assessment using a pitch-configurable platform to simulate rooftop work.
  • Measurement of trunk flexion angle and normalized electromyography (EMG) signals using motion capture and EMG systems.
  • Evaluation under varying roof slopes, postures, facing directions, and working paces.

Main Results:

  • Identified significant work-related factors influencing LBD development.
  • Revealed unfavorable conditions, such as stooped postures on low-pitch roofs at fast paces, increase LBD risk.
  • Quantified biomechanical indicators (trunk flexion, EMG) under different roofing scenarios.

Conclusions:

  • Specific roofing tasks and postures significantly impact LBD risk.
  • Provides data for understanding nonfatal LBD development in construction.
  • Informs the development of targeted interventions and safety guidelines to reduce LBD prevalence in roofing jobsites.