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NZQA registered unit standard

17756 version 4 Page 1 of 6

Title Level

Assess and manage individual hazardous trees 4 Credits 15

Purpose

People credited with this unit standard are able to: prepare for felling hazardous trees; assess the specific hazard or hazards associated with individual hazardous trees; demonstrate techniques for managing hazardous trees; describe techniques for managing trees with butt decay; demonstrate knowledge of the use of wedges for tree felling; and demonstrate tree driving.

Classification

Forestry > Tree Felling

Available grade

Achieved

Entry information Critical health and safety prerequisites Explanatory notes 1 The term `hazardous trees' refers to trees which because of physical damage, butt, stem or crown rot, malformation, growth characteristics, or specific characteristics of the tree species, constitute a serious hazard to the tree faller. It is the objective of this unit standard that people who demonstrate competence in the unit are able to fell such trees safely or make decisions to take alternative measures. For the purpose of this unit standard, `managing' a tree means felling the tree where safety considerations permit. Approved Code of Practice refers to the Approved Code of Practice for Safety and Health in Forest Operations published by the Occupational Safety and Health Service, (Wellington: Department of Labour, 1999) and any subsequent amendments. Available at http://www.osh.dol.govt.nz/order/catalogue/301.shtml. Best Practice Guides refers to the Best Practice Guidelines for Tree Felling and any subsequent amendments; and the Best Practice Guidelines for Chainsaw Use; and any subsequent amendments. Both are published by FITEC and available from FITEC at http://www.fitec.org.nz, or FITEC, PO Box 137067, Parnell, Auckland. Prerequisite: Unit 17766, Fell trees safely using a chainsaw, or demonstrate equivalent knowledge and skills.

2

3

4

Forest Industries Training and Education Council (FITEC) SSB Code 102030

© New Zealand Qualifications Authority 2010

NZQA registered unit standard

17756 version 4 Page 2 of 6

5

Definitions PPE refers to personal protective equipment and may include but is not limited to protective clothing, gloves, safety glasses, headwear, footwear, hearing protection, and safety devices. Worksite policies and procedures refer to documented policies and to documented or other directions provided to staff. These include, but are not limited to, ways of managing health and safety, environmental considerations, quality, and production, and must conform to legislation. Examples include standard operating procedures, company health and safety plans, on-site briefings, and supervisor's instructions.

Outcomes and evidence requirements

Outcome 1 Prepare for felling hazardous trees. Evidence requirements 1.1 PPE meets the requirements of the Approved Code of Practice. Range safety helmet, earmuffs, chainsaw operator safety trousers or chaps, safety boots, close fitting and comfortable clothing, high visibility clothing.

1.2

Equipment for felling trees meets the requirements of the Approved Code of Practice and the Best Practice Guides. Range wedges, driving tool, first aid requirements, field maintenance tools, fuel and oil containers, fire suppression equipment, means of communication, felling signs.

1.3

Chainsaw meets the requirements of the Approved Code of Practice and the Best Practice Guides. Range adequate power and bar length for the task, safety features, condition of chainsaw.

1.4

Additional equipment which may be required for felling very large or hazardous trees is identified. Range may include but is not limited to ­ additional wedges, tree jacks, driving maul, axe, second chainsaw, strops and/or ropes, winch and/or machine for pulling or pushing.

1.5

Requirement for additional personnel is determined. Range assistant, observer competency in accordance with the Approved Code of Practice.

Forest Industries Training and Education Council (FITEC) SSB Code 102030

© New Zealand Qualifications Authority 2010

NZQA registered unit standard

17756 version 4 Page 3 of 6

Outcome 2 Assess the specific hazard or hazards associated with individual hazardous trees. Evidence requirements 2.1 The area within at least two tree lengths of the hazardous tree is assessed for hazards which may affect felling, in accordance with the Approved Code of Practice. Trees which need to be felled and/or cleared from the vicinity of the hazardous tree are identified and appropriate action taken. Hazards posed by the immediate environment surrounding the tree, which may affect felling, are identified. Range wind direction, wind strength, slope, impediments to escape route, obstructions on or near intended felling line.

2.2

2.3

2.4

Specific types of hazardous trees are described. Range trees with overhead hazards, malformed trees, trees with specific growth characteristics, tree species prone to splitting, slabbing or barber-chairing.

2.5

The total risks posed by the identified hazardous tree are assessed and a decision is made on action to fell or to make alternative arrangements. Range seek machine assistance, seek additional skilled assistance, leave standing and isolate.

Outcome 3 Demonstrate techniques for managing hazardous trees. Evidence requirements 3.1 The limitations of alternative back-cut techniques for felling various types of hazardous trees are explained in terms of soundness of butt and stem and combinations of the various types of hazard. Alternative back-cut techniques for felling trees are demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range quarter cut, split level, bore and release back-cuts, bore cutting through the scarf, fan cutting the back-cut.

3.2

Forest Industries Training and Education Council (FITEC) SSB Code 102030

© New Zealand Qualifications Authority 2010

NZQA registered unit standard

17756 version 4 Page 4 of 6

3.3

Techniques for managing trees with overhead hazards are demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range demonstrate two of ­ broken tops, broken branches, spar trees, hang-ups, suspended debris, crown rot, dead top, dead branches.

3.4

Techniques for felling malformed trees are demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range demonstrate one of ­ double or multiple leaders, heavy flanging or buttressing, butt sweep, stem malformation.

3.5

Techniques for felling trees with specific growth characteristics are described or demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range demonstrate one of ­ heavy leaning, intertwined branches or vines, spreading crown, heavy crown.

Outcome 4 Describe techniques for managing trees with butt decay. Evidence requirements 4.1 Techniques for managing trees with butt decay are described in accordance with the Approved Code of Practice and the Best Practice Guides. Range Outcome 5 Demonstrate knowledge of the use of wedges for tree felling. Evidence requirements 5.1 The uses of tree felling wedges are explained in accordance with the Best Practice Guides. Range 5.2 back-cut, tree position, point of balance, falling direction. rotten or hollow butt, rotten or hollow stem.

The use of a wedge to hold a back-cut open is demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range timing, positioning, setting, driving.

5.3

The use of a wedge to fell trees against their lean is demonstrated in accordance with the Approved Code of Practice and the Best Practice Guides. Range scarf depth, wedge number, bark trimming, timing, positioning, setting, driving.

© New Zealand Qualifications Authority 2010

Forest Industries Training and Education Council (FITEC) SSB Code 102030

NZQA registered unit standard

17756 version 4 Page 5 of 6

5.4 5.5

Wedges and driving tool selected are suited to the size of the tree to be felled. The driving of a wedge, to gain advantage of the swaying forward motion of the top of the tree, is demonstrated in accordance with the Best Practice Guides. Multiple wedge use is demonstrated in accordance with the Best Practice Guides. Range two wedges, three wedges, double lifting.

5.6

5.7

Technique for felling trees with side lean is demonstrated.

Outcome 6 Demonstrate tree driving. Evidence requirements 6.1 The Approved Code of Practice requirements relating to tree driving are described. Hazards associated with tree driving are explained. The distance between the driving tree and the tree to be driven is assessed in relation to tree height, and the point of aim is identified. Driving tree is suited to tree to be driven. Range position of driver tree, position of tree to be driven, falling path of driver tree, weight of driver tree, height of driver tree, characteristics of driver tree.

6.2 6.3

6.4

6.5 6.6 6.7

Both trees are prepared for felling in accordance with the Best Practice Guides. The driving tree is felled to carry the driven tree to the ground. Response to an unsuccessful drive is explained in accordance with the Approved Code of Practice, the Best Practice Guides, and worksite policies and procedures.

Status and review information Registration date 22 May 2008 Date version published Planned review date 16 July 2010 31 December 2013

Accreditation and Moderation Action Plan (AMAP) reference 0173 This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.

© New Zealand Qualifications Authority 2010

Forest Industries Training and Education Council (FITEC) SSB Code 102030

NZQA registered unit standard

17756 version 4 Page 6 of 6

Please note Providers must be granted consent to assess against standards (accredited) by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards. Consent requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact the Forest Industries Training and Education Council (FITEC) [email protected] if you wish to suggest changes to the content of this unit standard.

Forest Industries Training and Education Council (FITEC) SSB Code 102030

© New Zealand Qualifications Authority 2010

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Microsoft Word - 17756.doc