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AS 4970-2009

AS 4970-2009

Protection of trees on development sites

Standards Australia

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Table of Contents

<toc>
<bookmarktable>
<bookmark index=&apos;0&apos;>
<pageno>1</pageno>
<text>AS 4970-2009 PROTECTION OF TREES ON DEVELOPMENT SITES</text>
<bookmark index=&apos;1&apos;>
<pageno>4</pageno>
<text>PREFACE</text>
</bookmark>
<bookmark index=&apos;2&apos;>
<pageno>5</pageno>
<text>CONTENTS</text>
</bookmark>
<bookmark index=&apos;3&apos;>
<pageno>6</pageno>
<text>FOREWORD</text>
</bookmark>
<bookmark index=&apos;4&apos;>
<pageno>7</pageno>
<text>SECTION 1 SCOPE AND GENERAL</text>
<bookmark index=&apos;5&apos;>
<pageno>7</pageno>
<text>1.1 SCOPE</text>
</bookmark>
<bookmark index=&apos;6&apos;>
<pageno>7</pageno>
<text>1.2 APPLICATION</text>
</bookmark>
<bookmark index=&apos;7&apos;>
<pageno>7</pageno>
<text>1.3 REFERENCED DOCUMENTS</text>
</bookmark>
<bookmark index=&apos;8&apos;>
<pageno>7</pageno>
<text>1.4 DEFINITIONS</text>
<bookmark index=&apos;9&apos;>
<pageno>7</pageno>
<text>1.4.1 Determining authority</text>
</bookmark>
<bookmark index=&apos;10&apos;>
<pageno>7</pageno>
<text>1.4.2 Development</text>
</bookmark>
<bookmark index=&apos;11&apos;>
<pageno>8</pageno>
<text>1.4.3 Diameter at breast height (DBH)</text>
</bookmark>
<bookmark index=&apos;12&apos;>
<pageno>8</pageno>
<text>1.4.4 Project arborist</text>
</bookmark>
<bookmark index=&apos;13&apos;>
<pageno>8</pageno>
<text>1.4.5 Structural root zone (SRZ)</text>
</bookmark>
<bookmark index=&apos;14&apos;>
<pageno>8</pageno>
<text>1.4.6 Tree</text>
</bookmark>
<bookmark index=&apos;15&apos;>
<pageno>8</pageno>
<text>1.4.7 Tree protection zone (TPZ)</text>
</bookmark>
<bookmark index=&apos;16&apos;>
<pageno>8</pageno>
<text>1.4.8 Vigour</text>
</bookmark>
<bookmark index=&apos;17&apos;>
<pageno>8</pageno>
<text>1.4.9 Work</text>
</bookmark>
</bookmark>
</bookmark>
<bookmark index=&apos;18&apos;>
<pageno>9</pageno>
<text>SECTION 2 PLANNING AND THE TREE MANAGEMENT PROCESS</text>
<bookmark index=&apos;19&apos;>
<pageno>9</pageno>
<text>2.1 TREE MANAGEMENT PROCESS</text>
</bookmark>
<bookmark index=&apos;20&apos;>
<pageno>9</pageno>
<text>2.2 DETERMINING AUTHORITIES</text>
</bookmark>
<bookmark index=&apos;21&apos;>
<pageno>10</pageno>
<text>2.3 PLANNING</text>
<bookmark index=&apos;22&apos;>
<pageno>10</pageno>
<text>2.3.1 Site survey</text>
</bookmark>
<bookmark index=&apos;23&apos;>
<pageno>11</pageno>
<text>2.3.2 Preliminary tree assessment</text>
</bookmark>
<bookmark index=&apos;24&apos;>
<pageno>11</pageno>
<text>2.3.3 Preliminary arboricultural report</text>
</bookmark>
<bookmark index=&apos;25&apos;>
<pageno>12</pageno>
<text>2.3.4 Development design and review</text>
</bookmark>
<bookmark index=&apos;26&apos;>
<pageno>12</pageno>
<text>2.3.5 Arboricultural impact assessment</text>
</bookmark>
</bookmark>
</bookmark>
<bookmark index=&apos;27&apos;>
<pageno>13</pageno>
<text>SECTION 3 DETERMINING THE PROTECTION ZONES OF THE SELECTED TREES</text>
<bookmark index=&apos;28&apos;>
<pageno>13</pageno>
<text>3.1 TREE PROTECTION ZONE (TPZ)</text>
</bookmark>
<bookmark index=&apos;29&apos;>
<pageno>13</pageno>
<text>3.2 DETERMINING THE TPZ</text>
</bookmark>
<bookmark index=&apos;30&apos;>
<pageno>13</pageno>
<text>3.3 VARIATIONS TO THE TPZ</text>
<bookmark index=&apos;31&apos;>
<pageno>13</pageno>
<text>3.3.1 General</text>
</bookmark>
<bookmark index=&apos;32&apos;>
<pageno>13</pageno>
<text>3.3.2 Minor encroachment</text>
</bookmark>
<bookmark index=&apos;33&apos;>
<pageno>13</pageno>
<text>3.3.3 Major encroachment</text>
</bookmark>
<bookmark index=&apos;34&apos;>
<pageno>14</pageno>
<text>3.3.4 TPZ encroachment considerations</text>
</bookmark>
<bookmark index=&apos;35&apos;>
<pageno>14</pageno>
<text>3.3.5 Structural root zone (SRZ)</text>
</bookmark>
<bookmark index=&apos;36&apos;>
<pageno>15</pageno>
<text>3.3.6 Crown protection</text>
</bookmark>
</bookmark>
</bookmark>
<bookmark index=&apos;37&apos;>
<pageno>17</pageno>
<text>SECTION 4 TREE PROTECTION MEASURES</text>
<bookmark index=&apos;38&apos;>
<pageno>17</pageno>
<text>4.1 GENERAL</text>
</bookmark>
<bookmark index=&apos;39&apos;>
<pageno>17</pageno>
<text>4.2 ACTIVITIES RESTRICTED WITHIN THE TPZ</text>
</bookmark>
<bookmark index=&apos;40&apos;>
<pageno>17</pageno>
<text>4.3 PROTECTIVE FENCING</text>
</bookmark>
<bookmark index=&apos;41&apos;>
<pageno>18</pageno>
<text>4.4 SIGNS</text>
</bookmark>
<bookmark index=&apos;42&apos;>
<pageno>18</pageno>
<text>4.5 OTHER TREE PROTECTION MEASURES</text>
<bookmark index=&apos;43&apos;>
<pageno>18</pageno>
<text>4.5.1 General</text>
</bookmark>
<bookmark index=&apos;44&apos;>
<pageno>19</pageno>
<text>4.5.2 Trunk and branch protection</text>
</bookmark>
<bookmark index=&apos;45&apos;>
<pageno>19</pageno>
<text>4.5.3 Ground protection</text>
</bookmark>
<bookmark index=&apos;46&apos;>
<pageno>20</pageno>
<text>4.5.4 Root protection during works within the TPZ</text>
</bookmark>
<bookmark index=&apos;47&apos;>
<pageno>20</pageno>
<text>4.5.5 Installing underground services within TPZ</text>
</bookmark>
<bookmark index=&apos;48&apos;>
<pageno>20</pageno>
<text>4.5.6 Scaffolding</text>
</bookmark>
</bookmark>
<bookmark index=&apos;49&apos;>
<pageno>21</pageno>
<text>4.6 MAINTAINING THE TPZ</text>
<bookmark index=&apos;50&apos;>
<pageno>21</pageno>
<text>4.6.1 Mulching</text>
</bookmark>
<bookmark index=&apos;51&apos;>
<pageno>21</pageno>
<text>4.6.2 Watering</text>
</bookmark>
<bookmark index=&apos;52&apos;>
<pageno>21</pageno>
<text>4.6.3 Weed removal</text>
</bookmark>
</bookmark>
</bookmark>
<bookmark index=&apos;53&apos;>
<pageno>22</pageno>
<text>SECTION 5 MONITORING AND CERTIFICATION</text>
<bookmark index=&apos;54&apos;>
<pageno>22</pageno>
<text>5.1 GENERAL</text>
</bookmark>
<bookmark index=&apos;55&apos;>
<pageno>22</pageno>
<text>5.2 TREE PROTECTION PLAN</text>
</bookmark>
<bookmark index=&apos;56&apos;>
<pageno>22</pageno>
<text>5.3 PRE-CONSTRUCTION</text>
<bookmark index=&apos;57&apos;>
<pageno>22</pageno>
<text>5.3.1 Tree removal and pruning</text>
</bookmark>
<bookmark index=&apos;58&apos;>
<pageno>22</pageno>
<text>5.3.2 Installing tree protection fencing and other protection measures</text>
</bookmark>
</bookmark>
<bookmark index=&apos;59&apos;>
<pageno>22</pageno>
<text>5.4 CONSTRUCTION STAGE</text>
<bookmark index=&apos;60&apos;>
<pageno>22</pageno>
<text>5.4.1 General</text>
</bookmark>
<bookmark index=&apos;61&apos;>
<pageno>23</pageno>
<text>5.4.2 Site establishment</text>
</bookmark>
<bookmark index=&apos;62&apos;>
<pageno>23</pageno>
<text>5.4.3 Construction work</text>
</bookmark>
<bookmark index=&apos;63&apos;>
<pageno>23</pageno>
<text>5.4.4 Landscape works</text>
</bookmark>
<bookmark index=&apos;64&apos;>
<pageno>23</pageno>
<text>5.4.5 Practical completion</text>
</bookmark>
</bookmark>
<bookmark index=&apos;65&apos;>
<pageno>23</pageno>
<text>5.5 POST-CONSTRUCTION</text>
<bookmark index=&apos;66&apos;>
<pageno>23</pageno>
<text>5.5.1 Defects liability period</text>
</bookmark>
<bookmark index=&apos;67&apos;>
<pageno>23</pageno>
<text>5.5.2 Final certification</text>
</bookmark>
</bookmark>
</bookmark>
<bookmark index=&apos;68&apos;>
<pageno>25</pageno>
<text>APPENDIX A - DIAMETER AT BREAST HEIGHT (DBH)</text>
</bookmark>
<bookmark index=&apos;69&apos;>
<pageno>26</pageno>
<text>APPENDIX B - POTENTIAL DAMAGE TO TREES ON DEVELOPMENT SITES</text>
<bookmark index=&apos;70&apos;>
<pageno>26</pageno>
<text>B1 INTRODUCTION</text>
</bookmark>
<bookmark index=&apos;71&apos;>
<pageno>26</pageno>
<text>B2 BACKGROUND BIOLOGY</text>
<bookmark index=&apos;72&apos;>
<pageno>26</pageno>
<text>B2.1 General</text>
</bookmark>
<bookmark index=&apos;73&apos;>
<pageno>26</pageno>
<text>B2.2 Leaves</text>
</bookmark>
<bookmark index=&apos;74&apos;>
<pageno>26</pageno>
<text>B2.3 Trunks and branches</text>
</bookmark>
<bookmark index=&apos;75&apos;>
<pageno>26</pageno>
<text>B2.4 Roots</text>
</bookmark>
</bookmark>
<bookmark index=&apos;76&apos;>
<pageno>28</pageno>
<text>B3 EFFECTS OF DEVELOPMENT ON TREES</text>
<bookmark index=&apos;77&apos;>
<pageno>28</pageno>
<text>B3.1 General</text>
</bookmark>
<bookmark index=&apos;78&apos;>
<pageno>28</pageno>
<text>B3.2 Crown damage</text>
</bookmark>
<bookmark index=&apos;79&apos;>
<pageno>28</pageno>
<text>B3.3 Trunk damage</text>
</bookmark>
<bookmark index=&apos;80&apos;>
<pageno>28</pageno>
<text>B3.4 Root damage</text>
</bookmark>
</bookmark>
<bookmark index=&apos;81&apos;>
<pageno>29</pageno>
<text>B4 CONCLUSIONS</text>
</bookmark>
</bookmark>
<bookmark index=&apos;82&apos;>
<pageno>30</pageno>
<text>APPENDIX C - TREE PROTECTION ZONE SIGN EXAMPLE</text>
</bookmark>
<bookmark index=&apos;83&apos;>
<pageno>31</pageno>
<text>APPENDIX D - ENCROACHMENT INTO TREE PROTECTION ZONE</text>
</bookmark>
<bookmark index=&apos;84&apos;>
<pageno>32</pageno>
<text>APPENDIX E - BIBLIOGRAPHY</text>
</bookmark>
</bookmark>
</bookmarktable>
</toc>

Abstract

Provides guidance on the principles for protecting trees on land subject to development.

Scope

This Standard provides guidance on the principles for protecting trees on land subject to development. It follows, in sequence, the stages of development from planning to implementation.
This Standard aims to assist those concerned with trees in relation to development. Where development is to occur, the Standard provides guidance on how to decide which trees are appropriate for retention, and on the means of protecting those trees during construction work. It does not argue for or against development, or for the removal or retention of trees nor does it consider the monetary value of trees. The Standard does not apply to the establishment of new trees.

General Product Information

Document Type Standard
Status Current
Publisher Standards Australia
Committee EV-018
Supersedes
  • DR AS 4970

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