Hip Ridge Length Calculator
Ideal symmetric45degree hip rectangular roof ridgeplanlengthL−W, common pitch, equal overhang datum andL≥W; not actual ridge vent usable length. Actual independently established design/material/calibration and matched units; not a safe work instruction, code compliance or engineering approval.
Description
An ideal rectangular hip roof with equal slopes and symmetric hips has a ridge related to its plan dimensions.
An ideal rectangular hip roof with equal slopes and symmetric hips has a ridge related to its plan dimensions.1
This tool subtracts width from length under that geometric assumption.
When to use Hip Ridge Length Calculator
Use this tool to calculate width from length under that geometric assumption.
How to use Hip Ridge Length Calculator and how it works
- Prepare actualBuildingLongPlanDimension, actualBuildingShortPlanDimension, with the units, conventions and assumptions below.
- Enter the required fields and run Hip Ridge Length Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualBuildingLongPlanDimension | Actual Building Long Plan Dimension. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| actualBuildingShortPlanDimension | Actual Building Short Plan Dimension. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Supply positive rectangular plan length and width in matching units, with length>=width. Return length-width as ridge length under the equal-pitch symmetric hip-roof convention. A square plan yields zero; unequal slopes and overhang conventions are not modeled.
ridgeLength=planLength-planWidth Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Conditional geometric length in the input's compatible length unit. | number |
{
"input": {
"actualBuildingLongPlanDimension": 10,
"actualBuildingShortPlanDimension": 4
},
"output": {
"result": {
"value": 6
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Rafter Pitch Correction Calculator for a complementary operation: A sloped rafter is longer than its horizontal run by a factor determined by roof pitch.
Use Wire Length With Sag Calculator for a complementary operation: A hanging wire follows a catenary when its weight is uniform along its length and the supports are at equal height.
References
-
Hip Ridge Length Calculator — tool.io
Similar or alternative tools
- Rafter Pitch Correction Calculator
A sloped rafter is longer than its horizontal run by a factor determined by roof pitch.
- Wire Length With Sag Calculator
A hanging wire follows a catenary when its weight is uniform along its length and the supports are at equal height.