Resilient Channel STC Comparison
Look up the caller-supplied STC change from direct board attachment to a specified resilient-channel assembly, preserving channel, spacing, test, and manufacturer caveats.
Description
A resilient-channel rating difference belongs to a specific matched assembly and installation.
A resilient-channel rating difference belongs to a specific matched assembly and installation. It cannot be added to unrelated construction ratings.1
Look up the caller-supplied STC change from direct board attachment to a specified resilient-channel assembly, preserving channel, spacing, test, and manufacturer caveats.
When to use Resilient Channel STC Comparison
Use this tool to look up the caller-supplied STC change from direct board attachment to a specified resilient-channel assembly, preserving channel, spacing, test, and manufacturer caveats.
Choose a supported reference topic, run an input-free reference with an empty object, or prepare the measured values and caller-supplied test records requested. Keep acoustic metrics, frequency, units and test conditions consistent.
How to use Resilient Channel STC Comparison and understand its results
- Choose a supported reference topic, run an input-free reference with an empty object, or prepare the measured values and caller-supplied test records requested. Keep acoustic metrics, frequency, units and test conditions consistent.
- Enter benefits, queryBenefitId using the field table and calculation rules, then run the tool.
- Read benefitClassification, caveat, selectedBenefit, stcImprovementPoints. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| benefits | Resilient-channel benefit table | list of object; minimum entries: 1; maximum entries: 200 | Required |
| queryBenefitId | Benefit identifier | string; minimum length: 1 | Required |
| benefits[].baselineAssembly | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].baselineStc | Field in benefits record | number; minimum: 0 | Required in each record |
| benefits[].benefitId | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].channelProduct | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].channelSpacingMillimeters | Field in benefits record | number; strictly above: 0 | Required in each record |
| benefits[].installationCondition | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].ratingBasis | Field in benefits record | string; one of "estimated", "manufacturer-claim", "tested" | Required in each record |
| benefits[].resilientChannelAssembly | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].source | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].testMethod | Field in benefits record | string; one of "ASTM E90/E413", "ISO 10140-2/ISO 717-1", "manufacturer-method" | Required in each record |
| benefits[].testReference | Field in benefits record | string; minimum length: 1 | Required in each record |
| benefits[].withResilientChannelStc | Field in benefits record | number; minimum: 0 | Required in each record |
Supply 1–200 benefit records with unique exact IDs, finite nonnegative ratings, positive spacing and required product/installation/source/test fields. Query an exact ID; return selected row, signed points and improves/does-not-improve/tie by sign.
points=withChannelSTC−baselineSTC Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| benefitClassification | Benefit classification | string; one of "does-not-improve", "improves", "tie" |
| caveat | caveat | string |
| selectedBenefit | selectedBenefit | object |
| stcImprovementPoints | STC improvement (STC) | number |
| selectedBenefit.baselineAssembly | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.baselineStc | Field in selectedBenefit | number; minimum: 0 |
| selectedBenefit.benefitId | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.channelProduct | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.channelSpacingMillimeters | Field in selectedBenefit | number; strictly above: 0 |
| selectedBenefit.installationCondition | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.ratingBasis | Field in selectedBenefit | string; one of "estimated", "manufacturer-claim", "tested" |
| selectedBenefit.resilientChannelAssembly | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.source | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.testMethod | Field in selectedBenefit | string; one of "ASTM E90/E413", "ISO 10140-2/ISO 717-1", "manufacturer-method" |
| selectedBenefit.testReference | Field in selectedBenefit | string; minimum length: 1 |
| selectedBenefit.withResilientChannelStc | Field in selectedBenefit | number; minimum: 0 |
{
"input": {
"benefits": [
{
"baselineAssembly": "Single-layer steel-stud wall attached directly to framing with cavity insulation",
"baselineStc": 40,
"benefitId": "usg-steel-single-layer",
"channelProduct": "Resilient channel or equivalent",
"channelSpacingMillimeters": 610,
"installationCondition": "Single layer on each side; published summary, not a matched universal control",
"ratingBasis": "manufacturer-claim",
"resilientChannelAssembly": "Single-layer steel-stud wall with board attached through resilient channel",
"source": "USG Acoustical Assemblies SA200",
"testMethod": "ASTM E90/E413",
"testReference": "USG steel direct versus steel/resilient-channel summary",
"withResilientChannelStc": 56
}
],
"queryBenefitId": "usg-steel-single-layer"
},
"output": {
"benefitClassification": "improves",
"caveat": "A resilient channel can improve laboratory transmission loss by decoupling the board, but the benefit depends on channel design, orientation, spacing, fastening, board mass, cavity insulation, perimeter sealing, and flanking. Do not subtract or add the returned points to another assembly without matched test evidence.",
"selectedBenefit": {
"baselineAssembly": "Single-layer steel-stud wall attached directly to framing with cavity insulation",
"baselineStc": 40,
"benefitId": "usg-steel-single-layer",
"channelProduct": "Resilient channel or equivalent",
"channelSpacingMillimeters": 610,
"installationCondition": "Single layer on each side; published summary, not a matched universal control",
"ratingBasis": "manufacturer-claim",
"resilientChannelAssembly": "Single-layer steel-stud wall with board attached through resilient channel",
"source": "USG Acoustical Assemblies SA200",
"testMethod": "ASTM E90/E413",
"testReference": "USG steel direct versus steel/resilient-channel summary",
"withResilientChannelStc": 56
},
"stcImprovementPoints": 16
}
}Limitations and assumptions
No report, product or installation is verified. ISO method options do not establish Rw/STC equivalence; flanking and installation can alter field outcomes.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Stud Wall STC Comparison: Compare a caller-supplied single-stud and double-stud laboratory STC pair, return the signed point difference, and preserve each test reference without treating the result as a universal construction rule. For a complementary task, use STC and NIC Metric Classifier: Classify a caller-supplied ASTM or ISO airborne-sound record as laboratory STC, field NIC, apparent ASTC, or the corresponding distinct rating without equating the metrics.
References
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Resilient Channel STC Comparison — tool.io
Similar or alternative tools
- Stud Wall STC Comparison
Compare a caller-supplied single-stud and double-stud laboratory STC pair, return the signed point difference, and preserve each test reference without treating the result as a universal construction rule.
- STC and NIC Metric Classifier
Classify a caller-supplied ASTM or ISO airborne-sound record as laboratory STC, field NIC, apparent ASTC, or the corresponding distinct rating without equating the metrics.