Building Code Definitions

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I

illuminance

the luminous flux falling onto a unit area of surface

impact insulation class (iic)

a single number rating derived from measured values of normalised sound pressure impact levels in accordance with Method ASTM E492, Annex A1. Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine. It provides an estimate of the impact sound insulating performance of a floor-ceiling assembly

impervious

that which does not allow the passage of moisture

insulation

in the context of fire protection, the time in minutes for which a prototype specimen of a fire separation, when subjected to the standard test for fire resistance, has limited the transmission of heat through the specimen

integrity

in the context of fire protection, the time in minutes for which a prototype specimen of a fire separation, when subjected to the standard test for fire resistance, has prevented the passage of flame or hot gases

intended use

, of a building includes—

(a) any reasonably foreseeable occasional other use that is not incompatible with the intended use; and

(b) normal maintenance; and

(c) activities taken in response to fire or any other reasonably foreseeable emergency—but does not include any other maintenance and repairs or rebuilding