Impact reducing flooring
- 72 Accessible design
- 73 Ergonomics: visual and physical
- 74 Exterior noise intrusion
- 75 Internally generated noise
- 76 Thermal comfort
- 77 Olfactory comfort
- 78 Reverberation time
- 79 Sound masking
- 80 Sound reducing surfaces
- 81 Sound barriers
- 82 Individual thermal control
- 83 Radiant thermal comfort
- P4 Impact reducing flooring
P4. Impact reducing flooring
To promote privacy and reduce acoustic disturbances from footsteps.
Footfall noise from adjacent spaces can lead to occupant dissatisfaction. Constructing interiors to accommodate for footfall noise can greatly reduce its negative impact on acoustic comfort. In common spaces, especially corridors in open environments where there is heavy foot traffic, this feature minimizes disturbances. Footfall noise is characterized by impact insulation class (IIC). IIC of a particular floor assembly is determined from the use of a tapping machine, as described in ASTM Method E492; most flooring products also list the IIC in their specification sheets. The higher the IIC, the greater sound attenuation of impact sound. IIC measurements cover a frequency range of 100-350 Hz; the range corresponds to a general “thump” at the lower level, and a sharper “clack” at the higher end.
All floors in the corridors of all regularly occupied spaces have the following:
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Verification Methods Matrix
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PART 1 (Design)
California Building Code (2013) Title 24 Section 1207.3 states that the impact insulation coefficient (IIC) rating shall be not less than 50 for separate floor-ceiling assemblies when tested in accordance with ASTM E 492.