understanding the building categories
TRANSCRIPT
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Understanding thebuilding categories
For the licensed building practitioner scheme
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Understanding the bUilding categories for the licensed bUilding Practitioner schemeb
contents
01 WhY haVe bUilding categories?
02 What are the bUilding c ategories?
04 categorY 1 b Uildings
12 categorY 2 b Uildings
18 categorY 3 b Uildings
19 aPPendices
24 glossarY of terms Used in this booKlet
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Why have building categories?
Understanding the building categories
provides additional inormation that
applicants or the Design 1, 2 and
3 and the Site 1 classes need to
understand when deciding which
class to apply to be licensed in.
The Design 1, 2 and 3 and the Site
1 classes are linked to a system o
building categories that are based
on a building’s complexity. This
booklet explains these three
categories in detail.
In the uture, licensed practitioners
will also be able to use this booklet
to categorise each building they are
working on.
The three categories are based on the
complexity o a building’s:
• Structure • Use
– Intended use
– Importance level
– Occupant numbers
• Rsscre (based on the E2/AS1 risk matrix)
• Sttus under the Historic Places Act.
Nte:Territorial Authorities also list heritage
buildings in their district plans. A heritage building
is not the same as a registered historic place and
is not relevant to these building categories unless
it is also a registered historic place.
The glossary at the end o this booklet
explains the use o these terms in
more detail.
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What are thebuilding categories?
Broadly, the three categories are:
Ctegr1 Detached or semi-detached residential
dwellings o conventional timber-rame
or masonry construction, and low- or
medium-risk envelope design.
Ctegr2 Buildings o moderate complexity,
including commercial and less-
conventional residential, with
the highest occupied loor less
than 10 metres above the exit
(typically up to 3 loors) and limited
occupant numbers.
Ctegr3 Buildings that present a high risk
to occupants because o what they
are used or, or have high occupant
numbers, or are o high community
importance or o historic importance.
The categories relate directly to the
three Design classes and the Site
1 class o the Licensed Building
Practitioner Scheme.
There is no direct alignment between
the Site 2 and Site 3 classes and
the building categories, because
practitioners licensed to these classes
can work on buildings in any category.
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• Design 1: This class covers
people who design Category 1
residential buildings.
• Design 2: This class covers people
who design Category 1 and 2
buildings. (Note: A person licensed
in Design 2 may also design
Category 1 buildings provided theywork within their own competence
and recognise when other design
skills are required.)
• Design 3: This class covers
people who design Category 1, 2
and 3 buildings. (Note: A person
licensed in Design 3 may also
design Category 1 and 2 buildings
provided they work within their own
competence and recognise when
other design skills are required.)
• Site 1: This class covers
competent people who are
responsible or technical
coordination and overseeing
the construction or alteration
o Category 1 buildings.
Remember: Once you are licensed,
you must work within the scopeo your competence.
The ollowing pages explain each
o the categories in more detail,
with examples.
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Category 1 buildings
In summary, a Category 1 building is a
detached or semi-detached residential
dwelling o conventional timber-rame
or masonry construction, and low- or
medium-risk envelope design.
A Category 1 building must meet
all o the ollowing criteria:
Structure • mustbestraightforward/
conventional construction designed
in accordance with NZS 3604:1999
Timber Framed Buildings and/or
NZS 4229:1999 Concrete Masonry
Buildings Not Requiring Speciic
Design, but can have
– engineer-designed or proprietary
oundations, lintels and roo
structures (eg roo trusses)
– speciically designed structures
such as conservatories,
porches and pergolas.
Use • must be a residential dwelling
• must be detached (SH use see
glossary, pg 29 ), or semi-detached
(SR use see glossary, pg 30 ) to a
maximum o two side-by-side units
– An SH building has no
prescribed occupant limits
– A semi-detached building
(ie SR) technically has an
occupant limit per loor o 50
people. However, in practice,
occupant numbers are unlikely
to be an issue since even large
dwellings do not normally
house this many people– must be importance level
2 (normal) based on AS
NZS 1170.0 (see glossary,
pg 24) .
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Rsscre • mustbealow-ormedium-risk
envelope design with a risk score
not exceeding 12 or any external
ace, based on the E2/AS1 risk
matrix (see glossary, pg 26) .
Sttus • cannot be a registered historic
place under the Historic Places
Act 1993 (see glossary, pg 24) .
Nte: 7 A building with three or more side-
by-side household units cannot be
classiied as Category 1.
7 A building with one household unit
above another cannot be classiied
as Category 1.
7 Steel-ramed houses cannot be
classiied as Category 1.
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Empes:Ctegr1bungs
Nrtheevtn Esteevtn
Sutheevtn Westeevtn
Timber deck
Empe1.1:Smpesnge-strehuse
Structure Use • Thebuildingiswithin • Thebuildingiswithin
Category 1 limits: Category 1 limits:
– The structure is generally – It is a detached dwelling
designed to NZS 3604 (SH see glossary, pg 29) – It is assumed that roo trusses – Occupant limits do not apply
based on a proprietary design – The house is a normal building.package have been used
– It is assumed that part o the
oundation is supported by a
speciically designed pile.
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Rsscre • Thebuildinghasariskmatrix
score based on E2/AS1 o 0
on all elevations based on:
– Medium wind zone (assumed)
– Single storey– Low-risk roo/wall intersections
and 600 mm eaves
– Simple design with brick
veneer cladding
– Low-risk deck.
– (Category 1 allows a maximum
o 12 on any ace.)
Sttus • The building is not a registered
historic place.
ThereretsCtegr1bung.
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Empe1.2:Sem-etcheresentunts
Nrtheevtn Esteevtn
Sutheevtn Westeevtn
Cantilevered deck
Structure Use • Thebuildingiswithin • Thebuildingiswithin
Category 1 limits: Category 1 limits:
– The structure is generally – It comprises two semi-detached
designed to NZS 3604 dwellings (SR)
– It is assumed that roo trusses – Occupant limits do not apply
based on a proprietary design – It is a normal building.package have been used.
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Rsscre • Thebuildinghasariskmatrix
score based on E2/AS1 o 10
on the highest risk elevation
(north), based on:
– Very high wind zone (assumed)
– Two storeys
– Low-risk roo/wall intersections
– 450 mm eaves
(excluding spouting)
– Simple design but has two
claddings (EIFS and horizontal
corrugated iron)
– High-risk cantilevered decks.
(Category 1 allows a maximumo 12 on any ace.)
Sttus • Thehouseisnotaregistered
historic place.
ThereretsCtegr1bung.
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Empe1.3:Tw-strehuse
Structure • Thebuildingiswithin
Category 1 limits:
– The structure is generally
designed to NZS 3604
– Roo trusses based on aproprietary design package have
been used
– Some proprietary lintels and a
speciic design lintel over the
garage have been used
– Part o the oundation is
supported by a speciically
designed pile.
Nte: If the house design included engineered
floor joists, or other engineer input such as portal
frames or specific bracing design, it would not
qualify as a Category 1 building.
Use • Thehouseiswithin
Category 1 limits:
– The house is a detached
dwelling (SH)
– Occupant limits do not apply
– The house is a normal building.
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Rsscre • Thehousehasariskmatrixscore
based on E2/AS1 o 11 on the
elevation shown, based on:
– Very high wind zone (assumed)
– Two storeys
– Low-risk roo/wall intersections
– 450 mm eaves
– Simple design but has
two claddings (EIFS and
weatherboard)
– High-risk enclosed deck.
(Category 1 allows a maximum
o 12 on any ace.)
Sttus • Thehouseisnotaregistered
historic place.
ThereretsCtegr1bung.
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Category 2 buildings
In summary, a Category 2 building is
a building o moderate complexity,
either commercial or less-conventional
residential, with the highest occupied
loor less than 10 metres above the
exit (typically up to 3 loors) and limited
occupant numbers.
A Category 2 building must meet the
ollowing criteria:
Structure/Rs • Hasnolimitsonstructure
or envelope
• Musthavenooccupiedfloors more than 10m above the exit.
Sttus • CannothaveaHistoricPlaces
Act category 1 rating.
Use • Cannothaveusesthatarehigh
risk eg chemical manuacturing
or processing plants, spray
painting operations, bulk storage
warehouses or lammable liquids
or gases (WH or WF uses see
glossary, pg 30 )• Cannothaveausethatinvolves
care and detention o people such
as hospitals, care acilities or
the aged, children or people with
disabilities, detention quarters,
or prisons (SC or SD uses see
glossary, pg 29 )
• Musthaveanimportancelevel o 2 as deined in Table 3.2 o AS/
NZS 1170.0 (see the glossary or
a deinition o importance levels)
• Cannothavemorepeoplethan listed in the table opposite:
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floor leVel
Grunr 1str (essthn4m bveet)
2nn3rrs 4mt<10mbve et
U
s e
Pepeseepng up to 50 up to 25 up to 25
Pepewrng up to 500 up to 250 up to 100
Pepencrws(egshp,resturnt, sch,thetre,stum) up to 500 up to 250 0
Ttnumberpepewe 500 250 100
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Empes:Ctegr2bungs
Nrtheevtn Esteevtn
Sutheevtn Westeevtn
Paved deck above entry
Paved deckover garage
Empe2.1:Resentbung
This example is based on the
Department o Building and Housing
publication External Moisture –
A Guide to Using the Risk Matrix .
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Structure • Thestructureisnotwithin
Category 1 limits, thereore
it is Category 2:
– The structure is generally
designed to NZS 3604 and– Roo trusses based on a
proprietary design package
have been used,
but
• Engineeredmid-floorjoistsand portal rames have been used.
These elements all outside
the scope o NZS 3604 and the
allowable exceptions.
Use • AhousecanbeeitherinCategory
1 or in Category 2
• Thehouseisadetacheddwelling (SH). Occupant limits and escape
heights do not apply to SH.
Rsscre • Thehousehaselevationrisk
scores based on E2/AS1 that
exceed the Category 1 maximum
score o 12:
– High wind zone (assumed)
– 2 storeys
– High-risk roo/wall intersections
– 600 mm eaves, but at two
storeys this is a medium risk
– High or very high envelope
complexity depending on
the elevation– High-risk roo decks.
Sttus • Thehouseisnotaregistered
historic place.
This house exceeds the Category 1
limits or structure and risk score.
ThereretsCtegr2bung.
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9.6 m
6.6 m
3.6 m
Retail outlet(CM)
Apartments (SR)
Apartments (SR)
Apartments (SR)
Restaurant(CL)
Empe2.2:Me-usecmmerc/resentbung
This is a our-storey, mixed-use Structure/Rs commercial and residential building • Thebuildingisclearlynotwithin with the highest occupied loor 9.6 Category 1 limits because it ismetres above the exit. not totally a residential dwelling
and it is outside the scope oNZS 3604/NZS 4229. There
are no structure or envelope
limits on Category 2 and
Category 3 buildings.
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storeY Use escaPe
height
occUPant
nUmbers
occUPant
limits
categorY 2?
Ground
Retail (CM)
0
30
500 3 Restaurant (CL) 90
1 Apartment (SR) 3.6 12 25 3 2 Apartment (SR) 6.6 12 25 3 3 Apartment (SR) 9.6 12 25 3
Use • TheCL,CMandSR(see glossary,
pg 29) uses are allowed in both
Category 2 and Category 3.
However, use alone does not
determine the category.
– Ground loor retail use (CM):
30 occupants
– Ground loor restaurant use
(CL): 90 occupants
– First loor apartment use (SR):
2 apartments with 6 people
in each
– Second loor apartmentuse (SR):
2 apartments with 6 people
in each
– Third loor apartment use
(SR): 2 apartments with
6 people in each
– Occupant numbers: The
highest occupied loor is less
than 10m above the exit, and
the occupant numbers are
within the allowable limits,
so the building is Category 2
• Importance level is 2 (normal
structure). This could be category
2 or Category 3.
Sttus • Thebuildingisnotaregistered
historic place.
The building has allowable uses andis within the height and occupant
number limits or Category 2, and
it is not a category 1 historic place.
ThereretsCtegr2bung.
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Category 3 buildings
A Category 3 building is a building
considered to be o high complexity
because o:
• therisktooccupantsbecauseof what the building is used or or
• thehighnumberofoccupantsor
•
thecommunityimportanceor • HistoricPlacesActrating.
A Category 3 building:
• hasno limits on:
– structure
– envelope design
– building height
– occupant numbers
– building use
– importance
– is any building with an Historic
Places Act category 1 rating.
There are no examples or Category
3 buildings here because they are
relatively simple to deine on the
basis o their use (above the occupant
numbers allowed in Category 2)
and whether they are a registered
historic place.
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Appendices
QucReerenceGue Gssrterms • Residential buildings • E2/AS1 risk matrix
• Commercial and mixed-use • Uses mentioned in this book
buildings • AS/NZS 1170.0: 2002
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QucReerenceGue: BU i l d i N GCaT EGoR i ESfoRR ES i dEN T i a l(SHaNdli M i T E dS RUSE)BUildiN GS 7 means not alloWed in this categorY
Ct.1 Ct.2 Ct.3 Structure NZS: 3604:1999 3
No limits apply
NZS: 4229: 1999 3
Specic design or proprietary oundations 3 Specic design or proprietary roo structures
(eg roo trusses)3
Specic design conservatories, porches, and pergolas
and similar low risk structures3
All structural design other than listed above 7 Use(ReBung[SpeceSstems,ChngeTheUse,anErthque-PrneBungs] Regutns2005) SH: Detached dwelling Any category
SR: Semi-detached/duplex Any category
imprtnceeve(reaS/NZS1170.0Tbe3.2) 1. Structures presenting a low degree o hazard to lie
and other property
Outbuildings and ancillary buildings are not
included in the LBP scheme
2. Normal structures and structures not in other
importance levels
All SH and semi-detached SR use buildings
should be Importance level 2
3. Importance levels 3–5 Category 3 only
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BU i l d i N GCaT EGoR i ESfoRR ES i dEN T i a l(SHaN dli M i T E dS RUSE)BUildiN GS 7M EaNSN oTa lloW Edi NTH i SCaTEGo Ry(C o N T. )
Ct.1 Ct.2 Ct.3 Bungheght Total building height greater than 10 metres 7 No height limits
Occupied foors in non-SH buildings that are 10 metresor more above the exit
7 7 Category 3 only
occupntnumbers SH: Single residential dwelling No limits apply
SR: Semi-detached/duplex Up to 50 people
Rsscre(reCmpncedcumentE2/aS1) Risk score exceeds 12 on any external elevation 7 No limits apply
SttusunertheHstrcPcesact(reHstrcPcesTrustwebstewww.hstrc.rg.nz) No status No limits apply
Category 2 historic place 7 Cat. 2 or Cat. 3
Category 1 historic place 7 7 Cat.only
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-
QucReerenceGue: BUildiN GCaTEGo R iESf o RC o M M ERC i alaN dM i x E d USEBU i l d i N GS 7 means not alloWed i n this categorY
Ct.2 Ct.3 Structure No limits apply
Use(reBung[SpeceSstems,ChngetheUse,nErthque-prneBungs] Regutns2005) SH: Single residential dwelling Use other check sheet
SR: Semi-detached/duplex
SR: eg multi-unit fats, apartments
SA: eg motels, hotels
WL: eg oces, service provision, light manuacturing
WM: eg manuacturing, storage acilities
CS, CL, CM, CO: eg caés, cinemas, schools, retail space
SC: eg hospitals, care acilities or aged 7
Category 3 only
SD: eg detention quarters, prisons 7 WH: eg chemical manuacturing or processing plants, spray
painting operations7
WF: eg bulk storage warehouses or fammable liquids/gases 7 imprtnceeve(reaS/NZS1170.0Tbe3.2) 1. Structures presenting a low degree o hazard to lie and
other property
Outbuildings and ancillary buildings
not included in LBP scheme
2. Normal structures and structures not in other importance levels
3. Structures that as a whole contain people in crowds or contents
o high value to the community or pose risks to people in
crowds (eg medical centres, schools, transport terminals)
7 Category 3 only
4. Structures with special post-disaster unctions (eg police
stations, re stations, ambulance bays)7
5. Special structures (not yet dened) 7
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-BU i l d i N GCaT EGoR i ESfoRCoM M ER C ialaN dM ix Ed US EBUildiN GS 7M EaNSN oTa lloW Edi NTH i SCaTEGo Ry(C o N T. )
Ct.2 Ct.3 Bungheght Occupied foors that are 10 metres or more above the exit 7 Category 3 only
occupntnumbers
No limits in Category 3
Ctegr2mtsnthenumberccupnts,bsenrheghtnuse: freve Use Ttwe Sa,SR CS,Cl,CM,Co Wl,WM Ground foor up to 500 <
– 50 <– 500 <
– 500
1st foor (< 4m) up to 250 <– 25 <
– 250 <– 250
2nd and 3rd foors 4m to <
10mup to 100 <
– 25 0 <– 100
Rsscre(reCmpncedcumentE2/aS1) No limits apply
SttusunertheHstrcPcesact(rewww.hstrc.rg.nz) No status No limits apply
Category 2 Historic Place Cat. 2 or Cat. 3
Category 1 Historic Place 7 Category 3 only
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Glossary o terms usedin this booklet
Historic places: Category 1 status
is given to places o ‘special or
outstanding historical or cultural
heritage signiicance or value’
and Category 2 status to places
o ‘historical or cultural heritage
signiicance or value’.
Places may be signiicant because
o their aesthetic, archaeological,
architectural, cultural, historical,
scientiic, social, spiritual,
technological or traditional
signiicance or value.
For more inormation go to the
Historic Places Trust website at
www.historic.org.nz which alsohas links to the Historic Places Act.
Importance level: Importance
levels are reerenced in the Building
(Designation o Building Work Licence
Classes) Order 2007.
Importance levels are determined
in accordance with AS/NZS 1170.0:
2002, Importance Levels for Building
Types - New Zealand Structures .
This describes, in general terms,
ive categories, and gives examples
o each. The headings are:
1. Structures presenting a low degree
o hazard to lie and other property
2. Normal structures and structures
not in other importance levels
3. Structures that as a whole contain
people in crowds or contents o
high value to the community or
pose risks to people in crowds
4. Structures with special
post-disaster unctions
5. Special structures.
You can buy copy o AS/NZS 1170.0:
2002 rom Standards New Zealand
at www.standards.co.nz or you can
read the speciic table on page 31
o this booklet.
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Risk score: The E2/AS1 risk matrix
takes into account a building’s
• windzone • numberofstoreys • roof/wallintersections • eaveswidth •
envelopecomplexity
• deckdesigns. (Table 1 rom E2/AS1 is reproduced
on the next page.)
The Department o Building and
Housing publication External moisture
– a guide to using the risk matrix can
beusedinconjunctionwithE2/AS1 to extend your understanding o theconcepts involved in risk assessment.
This 56-page guide is ree and can
be downloaded rom the Department’s
website at www.dbh.govt.nz
or you can order a hard copy by
phoning 0800 242 243.
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E2/aS1TaBlE1: d EfiN i T i o N So fR iSk SCo RE
a:Wnzne lwrs Low wind zone as described by NZS 3604 0
Meumrs Medium wind zone as described by NZS 3604 0
Hghrs High wind zone as described by NZS 3604 1
Verhghrs Very high wind zone as described by NZS 3604 2
B:Number stres
lwrs One storey 0
Meumrs Two storeys in part 1
Hghrs Two storeys 2
Verhghrs More than two storeys 4
C:R/w ntersectn esgn
lwrs Roo-to-wall intersection ully protected (eg hip and gable
roo with eaves)0
Meumrs Roo-to-wall intersection partly exposed (eg hip and gable
roo with no eaves)1
Hghrs Roo-to-wall intersection ully exposed (eg parapets,
enclosed balustrades or eaves at greater than 90˚
to vertical with sot lining)
3
Verhghrs Roo elements nishing within the boundaries ormed
by the exterior walls (eg lower ends o aprons, chimneys,
dormers, etc.)
5
d:Eveswth1,2
lwrs Greater than 600mm or single storey 0
Meumrs 451–600mm or single storey or over 600mm or two storey 1
Hghrs 101–450mm or single storey, or 451–600mm or two storey,
or greater than 600mm above two storey2
Verhghrs 0–100mm or single storey, or
0–450mm or two storey, or less than 600mm abovetwo storey
5
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Use: The term Use appears in the
Building (Designation of Building
Work Licence Classes) Order
2007 . It is based on the Building
(Specified Systems, Change the
Use, and Earthquake-prone Buildings)
Regulations 2005 , which deine change
o use or the purposes o sections
114 and 115 o the Building Act 2004.
These Regulations largely reproduce
Table 2.1 Purpose groups rom
Acceptable Solution C/AS1, with
some minor changes. Table 2.1
C/AS1 determines the purpose
group o a building based on the
activity or use o the building space
and its ire hazard category.
You can view the Building (Speciied
Systems, Change the Use, and
Earthquake-prone buildings)
Regulations 2005 at:
www.legislation.govt.nz
You can view the Acceptable Solution
C/AS1 on the Department’s website
at: www.dbh.govt.nz
The building uses mentioned
in this booklet are deined on
the ollowing pages.
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Use sPaces or dWellings examPles
cm
(Crowd Medium)
Spaces or displaying or selling retail goods,
wares, or merchandise
Exhibition halls, retail shops, supermarkets,
or other stores with bulk storage or display
cl (Crowd Large) Enclosed spaces (with or without kitchens
or cooking acilities) where more than 100
people gather or participating in activities,
but also enclosed spaces with kitchens or
cooking acilities and where 100 or ewerpeople gather or participating in activities
Cinemas (with qualiying spaces),
schools, colleges, and tertiary institutions,
libraries, nightclubs, restaurants and eating
places with cooking acilities, theatre
stages, opera houses, television studios(with audience)
sc
(Sleeping Care)
Spaces in which people are provided with
special care or treatment required because
o age, or mental or physical limitations
Hospitals, or care institutions or the aged,
children, or people with disabilities
sd (Sleeping
Detention)
Spaces in which people are detained
or physically restrained
Care institutions or the aged or children
with physical restraint or detention
quarters, hospitals with physical restraint
or detention quarters, detention quarters
in police stations, prisons
sh Detached dwellings where people live asa single household or amily. Detached
dwellings may include attached sel-
contained suites such as granny fats when
occupied by a member o the same amily,
and garages whether detached or part o
the same building and are primarily or
storage o the occupants’ vehicles,
tools and garden implements.
Dwellings, houses, being household units ,or suites in purpose group SA, separated
rom each other by distance.
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Use sPaces or dWellings examPles
SR (Sleeping
Residential)
Attached and multi-unit residential dwellings,
including household units attached to spaces
or dwellings with the same or other uses,
such as caretakers’ fats, and residential
accommodation above a shop
Multi-unit dwellings, fats, or apartments
WH (Working High) Spaces used or working, business, or
storage–high re load and slow, medium,
or ast re growth rates
Chemical manuacturing or processing
plants, distilleries, eed mills, four
mills, lacquer actories, mattressactories, rubber processing plants,
spray painting operations, places or
plastics manuacturing, or bulk storage
o combustible materials over 3m high
(excluding oamed plastics)
WF (Working Fast) Spaces used or working, business,
or storage–medium or high re load1
and ultra ast re growth rates
Areas involving signicant quantities
o highly combustible and fammable
or explosive materials which because
o their inherent characteristics constitute
a special re hazard, including bulk
plants or fammable liquids or gases,bulk storage warehouses or fammable
substances, and places or bulk storage
o oamed plastics
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–i M Po RTaN C ElEVEl Sfo RBUildiN GT y P ES N EWZ E a l a N dST RUC TUR ES imprtnceeve Cmment Empes
1 Structures
presenting a low
degree o hazard
to lie and other
property
Structures with a total foor area o <30m2
Farm buildings, isolated structures, towers in rural situations
Fences, masts, walls, in-ground swimming pools
2 Normal structures
and structures
not in other
importance levels
Buildings not included in Importance Levels 1, 3, or 4
Single amily dwellings
Car parking buildings
3 Structures that as
a whole contain
people in crowds
or contents o
high value to
the community
or pose risks to
people in crowds
Structures that as
a whole contain
people in crowds
or contents o high
value to the
community or
pose risks to
people in crowds
Buildings and acilities as ollows:
(a) Where more than 300 people can congregate in one area
(b) Day care centres with a capacity greater than 150
(c) Primary school or secondary school acilities with a capacity
greater than 250
(d) Colleges or adult education acilities with a capacity greater
than 500
(e) Health care acilities with a capacity o 50 or more residentpatients but not having surgery or emergency treatment
acilities
() Airport terminals, principal railway stations with a capacity
greater than 250
(g) Correctional institutions
(h) Multi-occupancy residential, commercial (including shops),
industrial, ocew and retailing buildings designed to
accommodate more than 5000 people and with a gross
area greater than 10,000 m2
(i) Public assembly buildings, theatres and cinemas o greater
than 1000 m
Emergency medical and other emergency acilities not designated
as post-disaster
Power-generating acilities, water treatment and waste water
treatment acilities and other public utilities not designated as
post-disaster
Buildings and acilities not designated as post-disaster containin
hazardous materials capable o causing hazardous conditions that
do not extend beyond the property boundaries
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–i M P o RTaN C ElEVEl Sfo RBUildiN GT y P ES N EWZ E a l a N dS T RUC TUR ES(Co N T. ) imprtnceeve Cmment Empes
4 Structures with Buildings and acilities designated as essential acilities
special post-
disaster unctionsBuildings and acilities with special post-disaster unction
Medical emergency or surgical acilities
Emergency service acilities such as re, police stations and
emergency vehicle garages
Utilities or emergency supplies or installation required as backupor buildings and acilities o Importance Level 4
Designated emergency shelters, designated emergency centres
and ancillary acilities
Buildings and acilities containing hazardous materials capable o
causing hazardous conditions that extend beyond the property
boundaries
5 Special structures Structures that have special unctions or whose ailure poses
catastrophic risk to a large area (eg 100 km2) or a large number o
people (eg 100,000)
Majordams,extremehazardfacilities Reproduced rom AS/NZS 1170.0:2002 Structural design actions, Part 0: General Principles (Table 3.2), with
permission rom Standards New Zealand under licence number 000680. AS/NZS 1170.0:2002 can be purchased
rom Standards NZ at www.standards.co.nz
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Reprinted in April 2008
by Department o Building and Housing
Disclaimer: While we have tried to make
this educational inormation as accurate as
possible, it does not cover every situation
and should not be regarded as legal advice.
This document is also available on the
Department’s website: www.dbh.govt.nz
ISBN: 978-0-478-19420-3 (Print)
ISBN: 978-0-478-19421-0 (Web)