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  2. General
  3. Infrastructure Development Processes
  4. Quality Assurance Information Requirements
    1. QA-1 Resource Consent Application Requirements
    2. QA-2 Works Undertaken By or For a Council
    3. QA-3 Development Works Approval
    4. QA-4 Survey Plan (s223) Approval
    5. QA-5 Final Sign Off (s224c) Application Requirements
    6. QA-6 As-Built Information
    7. QA-7 Bonds and Maintenance Fee
    8. QA-8 Building Consent Considerations
  5. Design Standards
    1. DS-1 General Provisions
    2. DS-2 Streetscape
    3. DS-3 Reserves
    4. DS-4 Transportation Network
    5. DS-5 Stormwater
    6. DS-6 Wastewater
    7. DS-7 Water Supply
    8. DS-8 Public Lighting
    9. DS-9 Network Utilities
    10. DS-10 Natural Hazards & Earthworks
    11. DS-11 Road Zone/Road Reserve Occupancy
    12. DS-12 Building Consent Considerations
  6. Standard Drawings
    1. SD-1 General Provisions
    2. Street design diagrams
    3. T100 Perspective Drawings
    4. T200 Streetscape
    5. T300 Reserves
    6. T400 Transport Network
    7. T500 Stormwater
    8. T600 Wastewater
      1. T601-Manhole - Standard
      2. T602-Manhole - Shallow
      3. T603-Manhole - Ladder and Steps
      4. T604-Manhole - Precast 1050mmØ Lid
      5. T605-Manhole - Entry Fixing
      6. T606-Manhole - Standard and Raised Access Detail
      7. T607-Manhole - Inclined Access Detail
      8. T608-Manhole - Internal Drop
      9. T609-Manhole - External Drop
      10. TT610-Manhole - PE Pipe Connections - Wall Adapter and Pre-Cast Manhole
      11. T611-Manhole - PE Pipe Connections - Stub Flange and In-Situ Base
      12. T612-Manhole - PE Pipe Connections - Electrofusion Coupler and In-Situ Base
      13. T613 Manhole - PE Pipe Connections - Puddle Flange and Pre-Cast Manhole
      14. T614-Manhole - Access Detail in Carriageway
      15. T620-Rodding Eye - Shallow < 2.5m
      16. T621-Rodding Eye - Deep > 2.5m
      17. T630-Property Connection - Standard
      18. T631-Property Connection - Depth > 2.5m
      19. T632-Property Connection - Within Property
      20. T633-Property Connection - Outside Property
      21. T634-Property Connection - Entry to Wastewater Main/Manhole
      22. T637-Lateral Connection - Single Connection to Manhole
      23. T638-Lateral Connection - Two or More Connections to Manhole
      24. T639-Lateral Connection - Single Connection to Main
      25. T640-Lateral Connection - Two Connections to Main
      26. T641-Lateral Connection - Two Adjacent Connections to Main
      27. T642-Lateral Connection - Rear Lot Connection
      28. T643-Mains Connection - Saddle Connection
      29. T651-Bedding and Backfill Details
      30. T652-Anti-Scour Block and Trenchstop
      31. T653-Buildings Near Public Mains
      32. T654-Close Proximity - Retaining Wall Restrictions
      33. T660-Pump Station - Typical Site Layout
      34. T661-Pump Station - Elevation Section
      35. T662-Pump Station - Plan Section
      36. T663-Pump Station - Pedestal Base Plate, Pedestal Mounting, Valve Chamber and Riser Connection
      37. T664-Pump Station - Deflector Plate, Ladder and Plinth
      38. T665-Pump Station - Valve Extension Spindle, Spindle Guide and Handwheel
      39. T666-Pump Station - Cover Slab
      40. T667-Pump Station - Frame
      41. T668-Pump Station - Chamber Lid
      42. T669-Pump Station - Chamber Lid Padlock and Handle
      43. T670-Pump Station - Rising Main Entry to Receiving Manhole
      44. T671-Pump Station - 25mm Water Service Connection
      45. T672-Pump Station - Electrical - Standard 2 Pump Stn Without Soft Starters (1 of 2)
      46. T673-Pump Station - Electrical - Standard 2 Pump Stn Without Soft Starters (2 of 2)
      47. T674-Pump Station - Electrical - Standard 2 Pump Stn SMC - 3 Soft Starters (1 of 2)
      48. T675-Pump Station - Electrical - Standard 2 Pump Stn SMC - 3 Soft Starters (2 of 2)
      49. T676-Pump Station - Electrical - Standard 2 Pump Stn IMS2 Soft Starters (1 of 2)
      50. T677-Pump Station - Electrical - Standard 2 Pump Stn IMS2 Soft Starters (2 of 2)
      51. T678-Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (1 of 3)
      52. T679 Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (2 of 3)
      53. T680-Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (3 of 3)
      54. T681-Electrical - 2 Pump Stn Mincas SMC-3 Soft Starters (1 of 2)
      55. T682-Electrical - 2 Pump Stn Mincas SMC-3 Soft Starters (2 of 2)
      56. T683-Pump Station - Electrical Cabinet
    9. T700 Water Supply
      1. T700-Water Supply Pipe Hierarchy
      2. T701-Water Supply - Looped and Linked Principal Mains
      3. T705-Water Main - Location at Intersections
      4. T706-Watermain - Location at Cul de Sac
      5. T707-Water Main - Rider Main to Main Connection
      6. T708-Water Main - Flushing Point
      7. T709-Water Main - Branch Valves and Hydrant Combinations
      8. T710-Water Main - Support for Asbestos Cement Main
      9. T713-Hydrant Surround
      10. T714-Hydrant Box
      11. T715-Hydrant Surround Blocks
      12. T716-Valve Surround
      13. T717-Valve Box
      14. T718-Valve Surround 75mm Concrete
      15. T719-Valve Surround 100mm Concrete
      16. T720 Valve Surround Heavy Duty Concrete
      17. T721-Anchor block for Sluice Valves on Mains
      18. T722-Anchor Block for Flanged Fittings on Mains
      19. T723-Thrust Blocks
      20. T724-Hydrant and Valve Marker Post
      21. T727-Water Meter - Type 1 and 2 Point of Supply Location Installation
      22. T728-Water Meter - Type 3 and 4 Point of Supply Location Installation
      23. T729-Water Meter - Fire System Connection With Potable Supply Installation
      24. T730-Standard 20mm Manifold Connection
      25. T731-Standard 20mm Manifold Connections - Plan View
      26. T732-Multiple 20mm Installations
      27. T733-20mm Connection Requiring Double Check Valve
      28. T734-20mm Connection Requiring RPZ Installation
      29. T735-25mm, 40mm or 50mm Meter Installation With Double Check Valve
      30. T736-<50mm Meter Installation with RPZ
      31. T737-Property Connection - 50mm Combination Meter Installation with Double Check Valve
      32. T738-Combination Meter Installation with RPZ
      33. T739 >50mm Combination Meter Installation with RPZ & Bypass Option
      34. T740-Property Connection - Secure Connection
      35. T741-Manhole - Class A Loading
      36. T742-Chamber - Class A Loading
      37. T743-Manhole - Class B Loading
      38. T744-Chamber - Class B Loading
      39. T751-Bedding and Backfill Details
      40. T753-Buildings Near Public Mains
    10. T800 Public Lighting
    11. AB As-Built Drawings
  7. Approved Materials
  8. Construction Standards
    1. CS-1 General
    2. CS-2 Site Clearance
    3. CS-3 Earthworks
    4. CS-4 Excavation
    5. CS-5 Excavation in Trench
    6. CS-6 Fill
    7. CS-7 Bedding & Backfill
    8. CS-8 Subsoil Drainage for Earthworks & Roads
    9. CS-9 Pipework
    10. CS-10 Pipe Fittings
    11. CS-11 Manholes & Rodding Eyes
    12. CS-12 Sumps
    13. CS-13 Trenchless Technology
    14. CS-14 Road Ripping
    15. CS-15 Road Pavement Layers
    16. CS-16 Kerb & Channel
    17. CS-17 Concrete Work
    18. CS-18 Carriageway Surfacing
    19. CS-19 Roadmarking
    20. CS-20 Berm Features
    21. CS-21 Street Structures
    22. CS-22 Road Maintenance
    23. CS-23 Grassing & Turfing
    24. CS-24 Vegetation Planting & Gardens
    25. CS-25 Reinstatement
  9. Inspection & Testing Requirements
    1. IT-1 General Provision
    2. IT-2 Streetscape
    3. IT-3 Reserves
    4. IT-4 Transportation Network
    5. IT-5 Stormwater
    6. IT-6 Wastewater
    7. IT-7 Water Supply
    8. IT-8 Public Lighting
    9. IT-9 Network Utilities
Infrastructure Development Code

DS-10.3 Peformance Criteria

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Nominated building platforms shall be prepared in consideration of the following criteria:

  1. The performance and functional requirements of the following sections of the New Zealand Building Code:
    1. B1 Structure.
    2. B2 Durability.
    3. D1 Access Routes.
    4. E1 Surface Water.
  2. Works recommended in the geotechnical and other hazards sections of the Development Evaluation Report have been completed and certified within the Development Completion Report.
  3. Slopes deemed to be complete shall:
    1. Have a minimum factor safety against slope failure of 1.5 (normal or average winter seepage condition).
    2. Have a minimum factor of safety against slope failure of 1.2 for extreme groundwater or other low return period temporary load conditions.
    3. Be assessed for seismic conditions by either of the following methods:
      1. Achieve a factor of safety of 1.0 for an appropriate design acceleration for structures likely to be constructed on slopes within the 3H:1V downslope failure zone to 4H:1V downslope runout zone or on land potentially subject to liquefaction.
      2. Design may be undertaken with consideration to the potential residual displacement of a slope with a factor of safety less than 1.0 under the peak ground acceleration used for design. If this approach is to be used, the design shall include a specific assessment of the potential impact of strain softening on the predicted displacements. This is particularly important given the occurrence of highly sensitive soils in the region.
  4. Nominated building platforms shall be located clear of the 3H:1V upslope failure zone or the building restriction line determined appropriate for the slope. The Geo-Professional shall determine this set back and define an appropriate building restriction line that will ensure that the nominated building platform achieves the factors of safety in c) for the required annual exceedance probability of extreme events.
  5. Nominated building platforms located within the 4H:1V downslope runout zone have been protected by way of a debris protection measure where slope stability factors of safety have not been achieved.
    Explanatory Note:
    2H:1V, 3H:1V and 4H:1V failure zones are recognised as general failure zones based on the observation of numerous failures within the Tauranga area. 
    The 4H:1V zone is the limit of debris runout zone for most failures involving sensitive ash soils. 
    The 2H:1V defines the limit of a high proportion of slips. Land within the 2H:1V limit could be designated as high risk.
    The 3H:1V defines the limit beyond which slope failures do not usually occur. 
    A smaller proportion of slope failures do occur between the 2H:1V and 3H:1V limits. Land between the 2H:1V and 3H:1V could be designated as moderate risk. For difficult soil issues (refer DS-10 - Apx B.5 Table 1: Geo-Professional Requirements for Geohazard Risk Assessment and Mitigation), Council requires the geotechnical reporting to be compiled by either a Category 1 or Category 2 Accredited Geo-Professional.  
  6. Residual differential settlement is no greater than 25mm over 6m lateral distance as currently specified in the New Zealand Building Code
    Explanatory Note:
    Where any change is made to the New Zealand Building Code or any relevant industry standard / text, Geo-Professionals are urged to contact Council to discuss. Changes to the IDC will be made where the consequences of the Building Code change are understood by Council.
    Until formal change to the IDC occurs or Council sends an advisory to the industry, the IDC shall take precedence. 

    Consideration shall be given to potential settlement of both engineered fill and foundation soils of building sites. This assessment shall consider both total and differential settlement potential. Differential settlements shall be no greater than those stated above. Any estimated differential settlement exceeding this range shall be specifically identified within the Development Completion Report or the site specific geotechnical assessment along with building development recommendations to manage the estimated differential settlements.
  7. Where the failure of a slope may impact a high importance structure or facility (i.e. Importance Level 3 or greater as given in NZS 1170 or Dam Structures) then the slope shall be designed to ensure that the factor of safety criteria referenced above are appropriate for use with the particular high importance structure or facility.
  8. Roads, service lanes or accessways vested in Council shall meet the performance criteria designed by the Geo–Professional at the time of Development Works Approval.
  9. Settlement monitoring shall demonstrate that the settlement has attained t90 prior to s224 being granted. If monitoring is ongoing on part of a development, the Resource Consent stages shall be amended (potentially requiring a variation to the Resource Consent) so that the monitored lots are not included in the s224 application.
Explanatory Note:
Lots that are undergoing monitoring cannot be included within the Geotechnical Completion Report as being complete because they are not complete. It would therefore be inappropriate and potentially unsafe for any construction of infrastructure or structures on these lots. 

Designers may need to consider reliance based design and may be required to consider larger seismic events.  Documents such as the NZTA Bridge Manual and NZSOLD Dam Safety Guidelines should also be referred to by the designer.    


Definitions in this section

Building platform

Council

Design

Development completion report

Development evaluation report

Development works approval

Geo-professional

Ground

Other hazards

Resource consent

Road

s224

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