NIOSH lifting equation
ASP written lesson, 9 min read. ASP Domain 3: Ergonomics
AI-drafted from the cited rules and fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- State the RWL equation and the load constant in U.S. units
- Write the horizontal, vertical, distance and asymmetric multipliers in U.S. units
- Calculate an RWL for a lift from its measured conditions
- Compute the lifting index and explain what a value above 1 means
- Identify which changes to a lift raise the RWL
What this lesson covers
This lesson shows how the Revised NIOSH Lifting Equation turns lift conditions into a recommended weight limit and a lifting index. Candidates need it for calculation questions on the exam, and safety professionals use it to decide which manual lifts to redesign.
This lesson is included with a pass
Written lessons come with every ASP pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam or $143 for all three, for 180 days.