Quick reference guide:
Building categories for residential (SH and limited SR use) buildings
X means not allowed in this category |
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Cat. 1 |
Cat. 2 |
Cat. 3 |
| Structure |
| NZS: 3604: 1999 |
 |
| NZS: 4229: 1999 |
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| Specific design or proprietary foundations |
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| Specific design or proprietary roof structures (eg roof trusses) |
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No limits apply |
| Specific design conservatories, porches, and pergolas and similar low risk structures |
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| All structural design other than listed above |
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| Use (ref Building [Specified Systems, Change the Use, and Earthquake-prone Buildings] Regulations 2005) |
| SH: Detached dwelling |
Any category |
| SR: Semi-detached/duplex |
Any category |
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| Importance level (ref AS/NZS 1170.0 Table 3.2) |
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| 1. Structures presenting a low degre of hazard to life and other property |
Outbuildings and ancillary buildings are not included in the Licensed Building Practitioner 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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Cat. 1 |
Cat. 2 |
Cat. 3 |
| Building height |
| Total building height greater than 10 metres |
|
No height limits |
| Occupied floors in non-SH buildings that are 10 metres or more above the exit |
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|
Category 3 only |
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| Occupant numbers |
| SH: Single residential dwelling |
No limits apply |
| SR: Semi-detached/duplex |
Up to 50 people |
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| Risk Score(ref Compliance Document E2/AS1) |
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| Risk score exceeds 12 on any external elevation |
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No limits apply |
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Status under the Historic Places Act (ref Historic Places Trust website www.historic.org.nz  ) |
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| No status |
No limts apply |
| Category 2 historic place |
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Cat. 2 or Cat. 3 |
| Category 1 historic place |
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Cat. 3 only |