Description
Subtract leftAllowance and rightAllowance from openingWidth for usableOpening and subtract gripWidth for clearance.
A supplied reach envelope, force arm, or hand-clearance dimension is a geometric input rather than a population-based ergonomic standard. Users and operating conditions can vary substantially.
Subtract leftAllowance and rightAllowance from openingWidth for usableOpening and subtract gripWidth for clearance.
When to use this tool
Use Grip Clearance Difference when you need one explicit human-interface geometry or force term.
How to use the tool and how it works
- Enter openingWidth, gripWidth, leftAllowance, rightAllowance. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read clearance, usableOpening. Use the output convention below.
Subtract leftAllowance and rightAllowance from openingWidth for usableOpening and subtract gripWidth for clearance.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| openingWidth | Opening Width | Required. Finite number; minimum 0. |
| gripWidth | Grip Width | Required. Finite number; minimum 0. |
| leftAllowance | Left Allowance | Required. Finite number; minimum 0. |
| rightAllowance | Right Allowance | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| clearance | Clearance | Required. Finite number. |
| usableOpening | Usable Opening | Required. Finite number. |
{
"input": {
"openingWidth": 100,
"gripWidth": 70,
"leftAllowance": 5,
"rightAllowance": 5
},
"output": {
"clearance": 20,
"usableOpening": 90
}
}Limitations and assumptions
- Negative values are retained; hand dimensions and allowances are supplied without an ergonomic or accessibility standard.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use an appropriate ergonomic and accessibility assessment with representative users and actual operating conditions.
References
Similar or alternative tools
- Handle Clear Span Finger Envelope Gap
Subtract envelope and twice sideAllowance from clearSpan for margin.
- Grip Ellipse Equivalent Diameter
Return sqrt(majorDiameter × minorDiameter) as areaEquivalentDiameter.