impact insulation class

Also found in: Acronyms.

impact insulation class (IIC)

A single-number rating used to compare and evaluate the performance of floor-ceiling constructions in isolating impact noises.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Estimation of Sound Transmission Class and Impact Insulation Class Rating for Steel Framed Assemblies.
Impact Insulation Class becomes the measurement scale of choice when dealing with sounds created as building parts resonate from the impact of movement and the shifting of loads.