A recognized tool (formula in fact) used to assess the risk of low back injury associated with manual lifting tasks.
- Methodologien: Maschinenbau, Produktdesign, Projektmanagement
NIOSH-Hebegleichung

NIOSH-Hebegleichung
- Kontinuierliche Verbesserung, Ergonomie, Menschliche Faktoren, Human Factors Engineering (HFE), Schlanke Fertigung, Prozessverbesserung, Risikoanalyse, Risikomanagement, Sicherheit
Zielsetzung:
Wie es verwendet wird:
- Berechnet ein empfohlenes Gewichtslimit (RWL) und einen Hebeindex (LI) auf der Grundlage von Faktoren wie horizontale Lage, vertikale Lage, Hebeabstand, Asymmetriewinkel, Hebehäufigkeit und Kupplungsqualität. Ein LI > 1,0 weist auf ein erhöhtes Risiko hin.
Vorteile
- Bietet eine quantitative Bewertung des Heberisikos; hilft bei der Identifizierung spezifischer Risikofaktoren bei einer Hebeaufgabe; ist weithin anerkannt und wird für die Neugestaltung von Hebeaufgaben verwendet.
Nachteile
- Gilt nur für beidhändiges manuelles Heben; berücksichtigt nicht alle Risikofaktoren (z. B. individuelle Fähigkeiten, Umgebungsfaktoren); kann ohne Schulung schwierig korrekt anzuwenden sein.
Kategorien:
- Ergonomie, Risikomanagement
Am besten geeignet für:
- Bewertung des Risikos von Verletzungen des unteren Rückens im Zusammenhang mit bestimmten manuellen Hebearbeiten.
Die NIOSH Lifting Equation (NLE) is particularly effective in environments where manual lifting is prevalent, such as warehouses, manufacturing plants, and medical settings. It is most commonly applied during the ergonomics phase of product design and workplace assessments, allowing engineers and safety specialists to collaborate on lifting task evaluations and modifications. Participants in the implementation of the NLE typically include safety engineers, ergonomists, occupational health professionals, human factors specialists, and employees who perform lifting tasks. The methodology can be integrated during various project phases, including the initial design development and during post-implementation reviews to ensure continuous improvement in ergonomics. A systematic approach using the equation can lead to redesigning jobs in a way that minimizes lifting risks and enhances worker safety. For instance, in an assembly line, modifying the positioning of components to align with the ideal lifting zones identified by the NLE can significantly lower the risk of injury. Industries like construction, logistics, and healthcare frequently utilize the NLE to analyze and adjust manual handling tasks. Furthermore, leveraging this methodology promotes a safety culture within organizations, encouraging ongoing risk assessments and fostering employee involvement in ergonomics initiatives, ultimately contributing to long-term injury reduction and enhanced operational efficiency.
Die wichtigsten Schritte dieser Methodik
- Calculate the horizontal location (H) of the load from the midpoint between the feet.
- Determine the vertical location (V) of the load from the floor to the handle of the load.
- Measure the lifting distance (D) as the vertical distance moved by the load.
- Assess the asymmetry angle (A), which is the angle of the lift relative to the midline of the body.
- Estimate the lifting frequency (F) by the number of lifts per minute.
- Evaluate coupling quality (C) based on the type of grip used on the load.
- Use the above parameters to calculate the Recommended Weight Limit (RWL) using the NIOSH lifting equation.
- Calculate the Lifting Index (LI) by dividing the load weight by the RWL.
- Interpret the LI value, identifying the associated risk of low back injury.
Profi-Tipps
- Regularly update the parameters based on ergonomic research to adapt the NIOSH equation to evolving workplace conditions.
- Incorporate technology such as motion capture systems to measure actual lifting techniques, improving the accuracy of RWL calculations.
- Utilize the findings from lifting assessments to implement training programs focused on safe lifting practices, reinforcing risk mitigation strategies.
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