Definitions for some of the construction industry acronyms and terms mentioned throughout Medium.


AAC Autoclaved aerated concrete
AUP Auckland Unitary Plan
BCA Building Consent Authority
BEV Battery electric vehicle
BMT Base metal thickness
BRANZ Building Research Association of NZ
CLT Cross laminated timber
CWEX Cold water expansion valve
dB Decibel (unit measurement of sound, expressed on a logarithmic scale)
du/ha Dwelling units per hectare (the preferred measurement of density)
E2 The external moisture clause in the NZBC
EPDM Ethylene Propylene Diene Monomer
EV Electric vehicle
F4 The NZBC clause relating to safety from falling
FENZ Fire and Emergency New Zealand
FFL Finished floor levels
FRR Fire Resistance Rating
FW Floor waste
GPS-HUD Government Policy Statement on Housing and Urban Design
GWP Global warming potential
H1 The energy efficiency clause in the NZBC
HWC Hot water cylinder
IGU Insulated Glass Units (windows)
IIC Impact insulation class
ISPP Intensification Streamlined Planning Process
ITF Inter-tenancy floor
ITW Inter-tenancy wall
KEE Ketone ethylene ester
L4 or L5 Levels of finish quality for flush-stopped joints in plasterboard, fibrous plaster and fibre cement sheets
LED Light emitting diode
LSF Light steel framing
LTF Light timber frame
LVL Laminate veneer lumber
MBIE Ministry for Business, Innovation & Employment
MDH Medium density housing
MDRS Medium Density Residential Standards
MFE Ministry for Environment
MHU Mixed Housing Urban (Auckland H5 Residential Zone)
MURB Multi-unit residential building
NPS-UD National Policy Statement on Urban Development
NRCA National Roofing Contractors Association
NZBC New Zealand Building Code
NZGBC New Zealand Green Building Council
NZIA New Zealand Institute of Architects – te Kahui Whaihanga
NZMRM New Zealand Metal Roofing Manufacturers Association
ORGT Overflow relief gully trap
OSB Oriented strand board
PFC Parallel flange channel
PHEV Plug-in hybrid electric vehicle
PHINZ Passive House Institute New Zealand
PHPP Passive House Planning Package
PIR Poly isocyanurate foam, a form of polyurethane
PLT Parallel laminated timber
ppl/ha Population (people) per hectare (a common but inaccurate density measure)
PV Photovoltaics
PVC Polyvinyl chloride
R-value A thermal resistance measurement
RM-EHS Resource Management (Enabling Housing Supply and Other Matters) Amendment Bill
RT Rapid Transit
SED Specific engineering design under NZS 3604
SIP Structurally insulated panel
SIPS Structurally insulated panel system
SMACNA The Sheet Metal and Air Conditioning Contractors' National Association
STC Sound transmission class
STIC The Structural Timber Innovation Company, a collective co-funded by government and industry aiming to develop timber buildings for a wide range of uses
TCC Timber-concrete composite
TEEE Thermoplastic Elastomer Ether Esters
THAB Terrace Housing and Apartment Building (Auckland intensification zone)
TOD Transport Oriented Development
TPO Thermoplastic Polyolefin
TPR Temperature/pressure relief
ULS Ultimate limit states
XPS Extruded polystyrene insulation