Description
Return landing area after door-swing overlap and exclusions.
Architectural openings and clearances depend on measured boundaries, projection axes and a caller-supplied comparison criterion. A positive geometric margin is distinct from demonstrating code compliance, safe access or a complete door-swing envelope. Plan lengths and projected dimensions must not be mistaken for full spatial measurements.
Return landing area after door-swing overlap and exclusions.
When to use this tool
Use Stair Landing Door Swing Overlap when checking the stated opening, projection or clearance geometry.
How to use the tool and how it works
- Enter landingArea, swingArea, overlapArea, excludedArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read clearArea. Use the output convention below.
Return landing area after door-swing overlap and exclusions. Require valid nonnegative overlap bounded by both areas and overlap+excluded <= landing; clearArea subtracts both.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| landingArea | Landing Area | Required. Finite number; minimum 0. |
| swingArea | Swing Area | Required. Finite number; minimum 0. |
| overlapArea | Overlap Area | Required. Finite number; minimum 0. |
| excludedArea | Excluded Area | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| clearArea | Clear Area | Required. Finite number. |
{
"input": {
"landingArea": 10,
"swingArea": 3,
"overlapArea": 2,
"excludedArea": 1
},
"output": {
"clearArea": 7
}
}Limitations and assumptions
- No swing geometry, accessible route, evacuation performance or applicable legal minimum is calculated.
- 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 complete measured plans and a qualified architectural/engineering assessment with the applicable requirements for real construction or safety decisions.
References
Similar or alternative tools
- Ramp Landing Length Residual
Return provided-minus-supplied ramp-landing length.
- Soffit Slope Clearance At Point
Return linear soffit height and local floor clearance.