Handle Length Palm Width Minimum Rule Checker

Handle length minus actual palm breadth and two caller-specified end clearances, not grip-diameter or force rule. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.

Description

A handle must accommodate palm width and any chosen end clearances.

A handle must accommodate palm width and any chosen end clearances.^[1]

The remaining length is a geometric reserve, not a universal hand-tool suitability score. Use this tool to calculate handle Length Palm Width Minimum Rule Checker from the supplied measurements and assumptions.

When to use Handle Length Palm Width Minimum Rule Checker

Use this tool to calculate handle Length Palm Width Minimum Rule Checker from the supplied measurements and assumptions. Establish the observation protocol, units, task and reference population or review criterion before entering measurements.

How to use Handle Length Palm Width Minimum Rule Checker and understand its results

Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
Enter observedHandleLengthMm, observedPalmBreadthMm, callerEndClearanceMm, using the field meanings and rules below, then run the tool.
Read signedHandleLengthClearanceMm. Interpret the fields using their units, signs and evidence conventions below.
If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.

Input field	Meaning	Value type	Requirement
observedHandleLengthMm	Observed handle length mm	number	Required
observedPalmBreadthMm	Observed palm breadth mm	number	Required
callerEndClearanceMm	Caller end clearance mm	number	Required

Enter positive handle length and palm width with nonnegative per-end clearance, in mm. Return handle minus palm minus twice the clearance. Negative reserve is retained and no pass boolean or ergonomic guideline is installed.

reserveMm=handleLengthMm−palmWidthMm−2×endClearanceMm

Use the exact units, boundary rules, ordering and missing-evidence conventions above.

Output field	Meaning	Value type
signedHandleLengthClearanceMm	Signed Handle Length Clearance Mm; follow the units, sign, ordering and evidence convention stated above	number

json

{
  "input": {
    "observedHandleLengthMm": 110,
    "observedPalmBreadthMm": 90,
    "callerEndClearanceMm": 15
  },
  "output": {
    "signedHandleLengthClearanceMm": -10
  }
}

Limitations and assumptions

The remaining length is a geometric reserve, not a universal hand-tool suitability score. Interpretation depends on the units, sampling scope and exact model described above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.

Alternative or Complementary methods

Use Anthropometric Counter Depth Forward Reach Kitchen Checker for this related task: Counter reach depends on functional reach, counter depth and front setback.

Use Anthropometric Walkway Width Two-Person Passing Checker when its separate inputs and assumptions fit the question: Two people passing need space for both body widths and chosen clearances.

References

Handle Length Palm Width Minimum Rule Checker — tool.io

Similar or alternative tools

Anthropometric Counter Depth Forward Reach Kitchen Checker
Counter reach depends on functional reach, counter depth and front setback.
Anthropometric Walkway Width Two-Person Passing Checker
Two people passing need space for both body widths and chosen clearances.