Design Freezing Index Selection Lookup
Independently verified site/baseline/return period design freezing index reference, not fixed regional building code or current soil state. Exact independently documented reference matching, signed discrepancy retained. Caller independently establishes homogeneous observation coverage and model/reference applicability; not observed future climate, crop suitability or validated drought severity.
Description
A design freezing index depends on a documented site, method and reference period.
A design freezing index depends on a documented site, method and reference period.1
An exact caller-key comparison does not determine a design index from temperature observations. Use Design Freezing Index Selection Lookup to evaluate the supplied inputs under the model explained below.
When to use Design Freezing Index Selection Lookup
Use Design Freezing Index Selection Lookup to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Design Freezing Index Selection Lookup and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Caller verified design freezing index keys, Caller verified design freezing index values, Query design freezing index key, Observed design freezing index value using the field table and validation rules below, then run the tool.
- Read Caller reference value, Signed observed minus reference; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerVerifiedDesignFreezingIndexKeys | Caller verified design freezing index keys | array of string | Required; constraints below |
| callerVerifiedDesignFreezingIndexValues | Caller verified design freezing index values | array of number | Required; constraints below |
| queryDesignFreezingIndexKey | Query design freezing index key | string | Required; constraints below |
| observedDesignFreezingIndexValue | Observed design freezing index value | number | Required; constraints below |
Enter nonempty unique nonblank reference keys, aligned nonnegative reference index values, an exact query and a nonnegative observed value. Return the selected reference and observed minus reference as a signed discrepancy in the caller's consistent index unit. Unknown keys fail. The tool does not infer location, climate period, temperature integration or design applicability.
reference=values[indexOfExactQuery(keys)]; discrepancy=observed−reference Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| callerReferenceValue | Caller reference value | number |
| signedObservedMinusReference | Signed observed minus reference | number |
{
"input": {
"callerVerifiedDesignFreezingIndexKeys": [
"a",
"b"
],
"callerVerifiedDesignFreezingIndexValues": [
2,
4
],
"queryDesignFreezingIndexKey": "b",
"observedDesignFreezingIndexValue": 5
},
"output": {
"callerReferenceValue": 4,
"signedObservedMinusReference": 1
}
}Limitations and assumptions
An exact caller-key comparison does not determine a design index from temperature observations. Apply the exact scope and assumptions explained 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 explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Concrete Freeze Thaw Cycles Calculator for a related task: Freeze-thaw counting requires distinct freezing and thawing thresholds and a chosen cycle convention.
Use Permafrost Active Layer Stefan Solution Calculator for a related task: The ideal Stefan thaw-depth model balances conductive heat with latent heat.
References
-
Design Freezing Index Selection Lookup — tool.io
Similar or alternative tools
- Concrete Freeze Thaw Cycles Calculator
Freeze-thaw counting requires distinct freezing and thawing thresholds and a chosen cycle convention.
- Permafrost Active Layer Stefan Solution Calculator
The ideal Stefan thaw-depth model balances conductive heat with latent heat.