NIOSH Recommended Weight Limit (RWL)

NIOSH Recommended Weight Limit (RWL)

ER-01
ASPCSPFoundational

Formula
RWL = LC × HM × VM × DM × AM × FM × CM
When to Use

Determine the maximum safe weight a healthy worker can lift repeatedly without risk of lower back injury. No need memorize numeric values.

Symbol Legend
SymbolMeaningUnitNote
LCLoad Constant23 kg / 51 lbFixed constant
HMHorizontal Multiplier25/H
VMVertical Multiplier1 - 0.003
DMDistance Multiplier0.82 + 4.5/D
AMAsymmetric Multiplier1 - 0.0032A
FMFrequency Multiplier
CMCoupling Multiplier

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