Roof Wind Uplift Pressure Calculator
Actual independently governing net pressure q×signed net coefficient, not net pressure×roof area already covered; zone/gust/internal pressure coefficient external. Actual independently established design/material/calibration and matched units; not a safe work instruction, code compliance or engineering approval.
Description
Roof wind pressure depends on the velocity pressure and net pressure coefficient applicable to the surface.
Roof wind pressure depends on the velocity pressure and net pressure coefficient applicable to the surface.1
This tool multiplies those supplied values and retains the sign of the net coefficient.
When to use Roof Wind Uplift Pressure Calculator
Use this tool to calculate those supplied values and retains the sign of the net coefficient.
How to use Roof Wind Uplift Pressure Calculator and how it works
- Prepare callerIndependentlyApplicableVelocityPressure, callerNetRoofPressureCoefficient, with the units, conventions and assumptions below.
- Enter the required fields and run Roof Wind Uplift Pressure 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 |
|---|---|---|---|
| callerIndependentlyApplicableVelocityPressure | Caller Independently Applicable Velocity Pressure. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
| callerNetRoofPressureCoefficient | Caller Net Roof Pressure Coefficient. Use the units and matching context stated in the calculation below. | number | Required; finite; other constraints below |
Supply nonnegative velocity pressure and finite signed net pressure coefficient. Return their product in the pressure input's unit, retaining the coefficient's sign. The tool does not derive wind speed, exposure, external or internal coefficients, or the relevant standard branch.
netPressure=velocityPressure*netCoefficient 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 | Signed pressure in the velocity-pressure input unit. | number |
{
"input": {
"callerIndependentlyApplicableVelocityPressure": 5,
"callerNetRoofPressureCoefficient": -2
},
"output": {
"result": {
"value": -10
}
}
}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 Roof Wind Uplift Calculator for a complementary operation: Net roof uplift force depends on independently established pressure and tributary area.
Use Blast Load Pressure Calculator for a complementary operation: Protective blast-load analysis depends on the wave model, geometry and qualified engineering evidence.
References
-
Roof Wind Uplift Pressure Calculator — tool.io
Similar or alternative tools
- Roof Wind Uplift Calculator
Net roof uplift force depends on independently established pressure and tributary area.
- Blast Load Pressure Calculator
Protective blast-load analysis depends on the wave model, geometry and qualified engineering evidence.