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Mobile app calculates sound transmission for wood-framed assemblies

BD+C

That report addresses the 2018 International Building Code’s two parameters to establish minimum acoustical requirements: Sound Transmission Class (STC) and Impact Insulation Class (IIC).

IIC 59
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Effects of acoustical ceiling panel type: Vertical sound isolation

Construction Specifier

There have been multiple, comprehensive studies on the noise isolating performance of partitions (for more information, read California Department of Health Services’ “Catalogue of STC and IIC Ratings for Wall and Floor/Ceiling Assemblies;” available through the Western Wall and Ceiling Contractors Association’s Technical Services Information Bureau (..)

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DCA3: Designing fire-rated I-joist assemblies

Construction Specifier

Floor assemblies for multifamily projects are typically required by International Building Code ( IBC ) Chapter 12 to meet minimum sound ratings of sound transmission class (STC) 50 and impact insulation class (IIC) 50. It is relatively common for building owners to ask for their floor assemblies to be designed to exceed these code minimums.

Design 52
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In pursuit of acoustical equity

Construction Specifier

En route to answering these questions, one must first consider the traditional approach to acoustics, which relies on ‘categorization’ and ‘acceptable-level’ schemes prevalent throughout building standards and codes.

Equity 52
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Sound isolation code requirements

Construction Specifier

ASTM defines single-number metrics for testing of airborne sound transmission class (STC) and impact isolation class (IIC). The impact measurement method for IIC uses a calibrated tapping machine as the sound source. The impact measurement method for IIC uses a calibrated tapping machine as the sound source.

IIC 82
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This is T-SLAB — the future of precast concrete floor systems

Construction Specifier

Impact isolation class (IIC) rating: 33. If T-SLABs with thicker dimensions are chosen for a given project, the transmission ratings shown here would be even higher. Sound test results: Slab thickness: 305 mm (12 in.). Slab weight: 50 kg (109.5 Sound transmission class (STC) rating: 64. Fire rating.

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Introducing T-SLAB—the latest revolution in precast concrete flooring systems

Construction Specifier

Impact insulation class (IIC) rating: 33. If T-SLABs with thicker dimensions are chosen for a given project, the transmission ratings shown here would be even higher. Sound test results. Slab thickness: 305 mm (12 in.). Slab weight: 535 kg/m 2 (109.5 Sound transmission class (STC) rating: 64. Fire rating.