RULA Neck-Trunk-Legs Score Calculator

Resolve RULA neck/trunk/legs Group B using caller 6×12 posture table and separate supplied muscle/force adjustments, not the mislabeled wrist-arm Group B alias; does not diagnose risk or validate a protocol edition.

Description

RULA Group B combines neck, trunk and leg posture scores.

RULA Group B combines neck, trunk and leg posture scores. Its table and separate adjustments must come from the caller’s chosen protocol.^[1]

Enter integer neck/trunk 1–6, legs 1–2, muscle 0–1, force 0–3 and an exact 6×12 integer table with cells 1–9. Return posture/adjusted scores and zero-based indexes.

When to use RULA Neck-Trunk-Legs Score Calculator

Use RULA Neck-Trunk-Legs Score Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No posture observation, protocol-edition validation or work-safety decision is performed.

Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.

How to use RULA Neck-Trunk-Legs Score Calculator and understand its results

Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.
Enter neckPostureScore, trunkPostureScore, legPostureScore, muscleUseAdjustment, forceLoadAdjustment, callerNeckTrunkLegsTable using the field table and calculation rules, then run the tool.
Read callerTablePostureScoreB, adjustedScoreB, tableRowIndex, tableColumnIndex. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
neckPostureScore	Neck posture score	number	Required
trunkPostureScore	Trunk posture score	number	Required
legPostureScore	Leg posture score	number	Required
muscleUseAdjustment	Muscle use adjustment	number	Required
forceLoadAdjustment	Force load adjustment	number	Required
callerNeckTrunkLegsTable	Caller neck trunk legs table	list of list of number	Required

Enter integer neck/trunk 1–6, legs 1–2, muscle 0–1, force 0–3 and an exact 6×12 integer table with cells 1–9. Return posture/adjusted scores and zero-based indexes.

row=neck−1; column=2(trunk−1)+legs−1; adjusted=tableCell+muscle+force

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
callerTablePostureScoreB	Caller table posture score b	number
adjustedScoreB	Adjusted score b	number
tableRowIndex	Table row index	number
tableColumnIndex	Table column index	number

json

{
  "input": {
    "neckPostureScore": 1,
    "trunkPostureScore": 1,
    "legPostureScore": 1,
    "muscleUseAdjustment": 1,
    "forceLoadAdjustment": 2,
    "callerNeckTrunkLegsTable": [
      [
        2,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ],
      [
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ],
      [
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ],
      [
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ],
      [
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ],
      [
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3,
        3
      ]
    ]
  },
  "output": {
    "callerTablePostureScoreB": 2,
    "adjustedScoreB": 5,
    "tableRowIndex": 0,
    "tableColumnIndex": 0
  }
}

Limitations and assumptions

No posture observation, protocol-edition validation or work-safety decision is performed.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Matrices are limited to 128 rows and 128 entries per row. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use RULA Upper Limb Group A Score Calculator: RULA Group A combines upper/lower arm, wrist and twist posture. Versioned table lookup and load adjustments are separate steps. For a complementary task, use RULA Final Grand Score Action Level Mapper: A RULA grand table caps high adjusted A/B scores into its final rows and columns. Action levels depend on caller bands.

References

RULA Neck-Trunk-Legs Score Calculator — tool.io

Similar or alternative tools

RULA Upper Limb Group A Score Calculator
RULA Group A combines upper/lower arm, wrist and twist posture. Versioned table lookup and load adjustments are separate steps.
RULA Final Grand Score Action Level Mapper
A RULA grand table caps high adjusted A/B scores into its final rows and columns. Action levels depend on caller bands.