Construction Specifier

AUGUST 26, 2020

It is important to take sound isolation into consideration when designing multifamily residential buildings to ensure the long-term comfort and satisfaction of building occupants. ASTM defines single-number metrics for testing of airborne sound transmission class (STC) and impact isolation class (IIC).

IIC 82

IIC Residential Environment Certification 82

Construction Specifier

APRIL 30, 2021

The information that does exist is mostly for multifamily residential buildings with wood framing/flooring and gypsum board ceilings. STC is measured in a laboratory and is used as reference during design. NIC is measured in the field after construction is complete.

Guidelines 98

Guidelines IRS IIC Concrete 98

Construction Specifier

SEPTEMBER 5, 2024

Finally, even with all the references to the sounds of “running of mechanical systems,” design of HVAC, ductwork and venting, plumbing, and vertical transportation are always improving to operate more efficiently and quietly, thus lowering interior noise pollution.

IIC 64

IIC Consulting Environment Products 64

Construction Specifier

JUNE 30, 2021

The incompatibility of the various test reports and reference standards makes it difficult to find common ground between generic and proprietary literature. On multifamily residential projects, a fully insulated joist cavity is typically necessary to allow the assembly to be used in roof/ceiling applications. Cavity insulation.

Design 52

Design IIC Documentation Residential 52