Punching Shear Slab Calculator
Audit column net shear after independent inside-perimeter loading; critical perimeter/code factors not selected. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
Punching-shear demand uses load outside a declared interior contribution and an effective resisting area.
Punching-shear demand uses load outside a declared interior contribution and an effective resisting area.1
This demand calculation does not evaluate shear resistance or select a code perimeter. Use this tool to calculate punching Shear Slab from the supplied measurements and assumptions.
When to use Punching Shear Slab Calculator
Use this tool to calculate punching Shear Slab from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
How to use Punching Shear Slab Calculator and understand its results
- Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
- Enter columnVerticalLoadN, independentlyExcludedInteriorLoadN, callerCriticalPerimeterM, effectiveSlabDepthM, using the field meanings and rules below, then run the tool.
- Read netPunchingDemandPa. 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 |
|---|---|---|---|
| columnVerticalLoadN | Column vertical load n | number | Required |
| independentlyExcludedInteriorLoadN | Independently excluded interior load n; caller assertion or measurement requiring independent evidence | number | Required |
| callerCriticalPerimeterM | Caller critical perimeter m | number | Required |
| effectiveSlabDepthM | Effective slab depth m | number | Required |
Enter nonnegative column load and excluded interior load in N, with positive critical perimeter and effective depth in m. Subtract excluded load and divide by perimeter×depth. A larger excluded load yields a retained negative demand; no capacity or code perimeter is selected.
punchingDemandPa=(columnLoadN−excludedLoadN)/(criticalPerimeterM×depthM) Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| netPunchingDemandPa | Net Punching Demand Pa; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"columnVerticalLoadN": 100,
"independentlyExcludedInteriorLoadN": 20,
"callerCriticalPerimeterM": 4,
"effectiveSlabDepthM": 0.2
},
"output": {
"netPunchingDemandPa": 100
}
}Limitations and assumptions
This demand calculation does not evaluate shear resistance or select a code perimeter. 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 RC Shear Capacity Calculator for this related task: A reinforced-concrete shear model combines a supplied concrete contribution with a reinforcement contribution.
Use Two-Way Slab Effective Depth Calculator when its separate inputs and assumptions fit the question: Effective slab depth measures from a reference face to a selected reinforcement layer.
References
-
Punching Shear Slab Calculator — tool.io
Similar or alternative tools
- RC Shear Capacity Calculator
A reinforced-concrete shear model combines a supplied concrete contribution with a reinforcement contribution.
- Two-Way Slab Effective Depth Calculator
Effective slab depth measures from a reference face to a selected reinforcement layer.