Standards

NZBC Clause  G6  AIRBORNE AND IMPACT SOUND

This Clause is extracted from the New Zealand Building Code contained in the First Schedule of the Building Regulations 1992.

OBJECTIVE
G6.1 The objective of this provision is to safeguard people  from illness or loss of amenity as a result of undue noise being transmitted between abutting occupancies.

FUNCTIONAL REQUIREMENT
G6.2 Building elements which are common between occupancies,  shall be constructed to prevent undue noise transmission from other occupancies or common spaces, to the habitable spaces of household units.

PERFORMANCE
G6.3.1 The Sound Transmission Class of walls, floors and ceilings, shall be no less than 55.
G6.3.2 The Impact Insulation Class of floors shall be no less than 55.

VERIFICATION METHOD G6/VM1

1.0 AIRBORNE SOUND INSULATION FIELD TESTS
1.0.1 The performance for airborne sound insulation may be verified using the procedures detailed in ASTM E 336, and the field sound transmission class may be verified using the method described in ASTM E 413. Field test results shall be within 5dB of the performance requirement.

2.0 IMPACT SOUND INSULATION FIELD TESTS
2.0.1 The performance for impact insulation may be verified using the procedures detailed in ISO 140:Part VII, and the field impact insulation class may be verified using the method described in ASTM E 989. Field test results shall be within 5dB of the performance requirement .