CLT Fire Resistance Calculator
Explicit one-face continuous char-depth accounting with independent zero-strength allowance, signed lost-section retained; not CLT bond-line falloff, residual bending capacity or fire rating. 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
A simplified CLT fire model subtracts char depth and a zero-strength allowance.
A simplified CLT fire model subtracts char depth and a zero-strength allowance.1
Remaining effective thickness does not determine fire-resistance duration or residual structural capacity. Use CLT Fire Resistance Calculator to evaluate the supplied inputs under the specific model below.
When to use CLT Fire Resistance Calculator
Use CLT Fire Resistance Calculator to evaluate the supplied inputs under the specific model below. Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
How to use CLT Fire Resistance Calculator and understand its results
- Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
- Enter Observed clt panel depth m, Caller verified char rate m minute, Caller independent zero strength layer m, Elapsed fire minutes using the field table and validation rules below, then run the tool.
- Read Caller remaining effective panel depth m and interpret units, signs, ordering and placeholders as explained below.
- If the tool reports an input error, correct that field and rerun. A successful false result, empty match list or unknown-evidence placeholder has the specific meaning described here; check the limitations before applying the result.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedCltPanelDepthM | Observed clt panel depth m | number | Required; constraints below |
| callerVerifiedCharRateMMinute | Caller verified char rate m minute | number | Required; constraints below |
| callerIndependentZeroStrengthLayerM | Caller independent zero strength layer m | number | Required; constraints below |
| elapsedFireMinutes | Elapsed fire minutes | array of number | Required; constraints below |
Enter positive initial panel depth in m, nonnegative char rate in m/min and zero-strength allowance in m, and nonnegative elapsed times in minutes. Return depth minus rate×time minus allowance for every time. The allowance is subtracted even at zero time and negative remaining thicknesses are returned without clamping; no resistance rating or residual capacity is inferred.
remainingDepthM[t] = depthM−charRateMPerMinute×t−zeroStrengthLayerM Field order, units and branch conditions follow the implementation explanation above.
| Output field | Meaning | Value type |
|---|---|---|
| callerRemainingEffectivePanelDepthM | Caller remaining effective panel depth m | array of number |
{
"input": {
"observedCltPanelDepthM": 0.2,
"callerVerifiedCharRateMMinute": 0.001,
"callerIndependentZeroStrengthLayerM": 0.01,
"elapsedFireMinutes": [
0,
10,
20
]
},
"output": {
"callerRemainingEffectivePanelDepthM": [
0.19,
0.18,
0.17
]
}
}Limitations and assumptions
Remaining effective thickness does not determine fire-resistance duration or residual structural capacity. Apply the exact scope and assumptions described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are stated above; extremely large inputs or outputs can also be rejected. These errors differ from successful results such as false, no matches or unknown evidence.
Alternative or Complementary methods
Use Composite Slab Shear Bond Calculator for a related task: An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.
Use Bracket Plate Yield Calculator for a related task: A rectangular plate's plastic moment can be converted into an ideal cantilever point load.
References
-
CLT Fire Resistance Calculator — tool.io
Similar or alternative tools
- Composite Slab Shear Bond Calculator
An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.
- Bracket Plate Yield Calculator
A rectangular plate's plastic moment can be converted into an ideal cantilever point load.