Page 912 - 2018_IRC

APPENDIX K

SOUND TRANSMISSION

The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.
User note:
About this appendx: Sound transmission relates directly to the psychological and long-term physical well-being of building occupants. Many
human activities cannot be accommodated efficiently or comfortably in various types of building spaces without proper attention to the mitiga-
tion of sound transmission from other spaces within the building, or from outside of the building. In Appendix K, attention is specifically paid to
the mitigation of sound transmission between dwelling units and other dwelling units and occupancies.

SECTION AK101 SECTION AK103
GENERAL STRUCTURAL-BORNE SOUND
AK101.1 General. Wall and floor-ceiling assemblies sepa-
rating dwelling units, including those separating adjacent AK103.1 General. Floor/ceiling assemblies between dwell-
ing units, or between a dwelling unit and a public or service
townhouse units, shall provide airborne sound insulation for area within a structure, shall have an impact insulation class
walls, and both airborne and impact sound insulation for (IIC) rating of not less than 45 when tested in accordance
floor-ceiling assemblies. with ASTM E492.

SECTION AK102
AIRBORNE SOUND SECTION AK104
AK102.1 General. Airborne sound insulation for wall and REFERENCED STANDARDS
floor-ceiling assemblies shall meet a sound transmission class ASTM E90—09 Test Method for Laboratory AK102.1
(STC) rating of 45 when tested in accordance with ASTM Measurement of Airborne AK102.1.1
E90. Penetrations or openings in construction assemblies for Sound Transmission Loss of
piping; electrical devices; recessed cabinets; bathtubs; soffits; Building Partitions and Elements
or heating, ventilating or exhaust ducts shall be sealed, lined, ASTM E492—09 Specification for Laboratory AK103.1
insulated or otherwise treated to maintain the required rat- Measurement of Impact Sound
ings. Dwelling unit entrance doors, which share a common Transmission through Floor-ceiling
space, shall be tight fitting to the frame and sill. Assemblies Using the Tapping
AK102.1.1 Masonry. The sound transmission class of Machine
concrete masonry and clay masonry assemblies shall be TMS 0302—12 Standard for Determining AK102.1.1
calculated in accordance with TMS 0302 or determined the Sound Transmission Class
through testing in accordance with ASTM E90. Rating for Masonry Walls

2018 INTERNATIONAL RESIDENTIAL CODE ® 887
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