Building Code Definitions

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means work on a building site, including earthworks, preparatory to or associated with the construction, alteration, demolition, or removal of a building

sound transmission class (stc)

a single number rating derived from measured values of transmission loss in accordance with classification ASTM E413, Determination of Sound Transmission Class. It provides an estimate of the performance of a partition in certain common sound insulation situations

specified features

, for the purposes of Clause F6, means the following:
(a) building elements that may act as obstructions: 
(b) safety features required under clauses of this code other than Clause F6 (for example, handrails required under Clause D1): 
(c) changes in direction: 
(d) stairs and ramps: 
(e) escape doors: 
(f) entries to a safe place

specified intended life

has the meaning ascribed to it by subsection (2) of section 39 of the Act as follows: “Specified intended life”, in relation to a building, means the period of time, as stated in an application for a building consent or in the consent itself, for which the building is proposed to be used for its intended use


in the context of fire protection, the time in minutes for which a prototype specimen of a primary element, when subjected to the standard test for fire resistance, has continued to carry its fire design load without failure

standard year

for the purposes of determining natural lighting, the hours between 8 am and 5 pm each day with an allowance being made for daylight saving

surface water

all naturally occurring water, other than sub-surface water, which results from rainfall on the site or water flowing onto the site, including that flowing from a drain, stream, river, lake or sea


territorial authority

has the meaning ascribed to it by section 2 of the Local Government Act 1974; and includes any organisation which is authorised to permit structures pursuant to section 12(1)(b) of the Resource Management Act 1991

thermal resistance

the resistance to heat flow of a given component of a building element. It is equal to the air temperature difference (°C) needed to produce unit heat flux (W/m2) through unit area (m2) under steady conditions. The units are °Cm2/W

total wall area

, in relation to a building, means the sum (expressed in square metres) of the following:
(a) the wall area of the building; and 
(b) the area (expressed in square metres) of all vertical glazing in external walls of the building

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