Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

AHCARB310 Mapping and Delivery Guide
Perform aerial rigging

Version 1.0
Issue Date: April 2024


Qualification -
Unit of Competency AHCARB310 - Perform aerial rigging
Description
Employability Skills
Learning Outcomes and Application This unit of competency describes the skills and knowledge required to perform aerial rigging by selecting and using appropriate equipment and methods. This work requires application of extensive arboricultural skills and knowledge, including various rigging techniques for lowering, controlling and redirecting loads during tree pruning and tree removal. Work is implemented with low risk work procedures and to comply with Safe Work Method Statement documentation.This unit applies to individuals who have a range of skills to select and apply a specialised range of methods, tools, equipment and information to complete routine activities and provide and transmit solutions to predictable and sometimes unpredictable problems. Discretion and judgement is required. Elevated work platforms may be involved.Licensing, legislative, regulatory, or certification requirements apply to this unit in some states and territories at the time of publication, and may differ according to jurisdiction. Specific determination should be sought through the relevant State or Territory. Works involving this unit of competency may be subject to local tree protection and preservation laws, and the relevant content of applicable Australian Standards.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Assessment must be demonstrated consistently over time in a suitable range of contexts and have a productivity-based outcome. No single assessment event or report is sufficient to achieve competency in this unit.

Assessment may be conducted in a simulated or real work environment, however determination of competency requires the application of work practices under work conditions.

The mandatory equipment and materials used to gather evidence for assessment include:

equipment:

rigging equipment

single rope technique (SRT) climbing kit

static and dynamic rope kit

harness

lowering and friction devices

high decibel whistle

personal protective equipment (PPE)

first aid and emergency kit

rescue kit

traffic management kit

signage – work zone

trees

materials:

rigging operations form - aerial

hazard identification and risk control form

equipment and PPE check form

emergency preparation form

rescue form - aerial

work communications form

knot identification form

Assessors must satisfy current standards for RTOs in the assessment of arboriculture units of competency.

Assessment must be conducted only by persons who have:

arboriculture vocational competencies at least to the level being assessed

current arboriculture industry skills directly relevant to the unit of competency being assessed
Prerequisites/co-requisites
Competency Field
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Prepare work site
  • Confirm location of worksite and location of correct tree as identified in scope of works
  • Obtain required site permits and licences
  • Determine location of above-and-below-ground services
  • Undertake a site-specific risk assessment by identifying work health and safety hazards and assessing risk
  • Ensure scope of works is within capacity and limits of team and equipment
  • Confirm first aid and rescue personnel, equipment and procedures applicable to tree work
  • Inspect tree and identify structural defects in relation to tree taxonomy, anatomy and physiology
  • Consider impact of wind speed and direction on rigging methods
  • Consider ‘cycles to failure‘ of load-bearing equipment
  • Select, prepare, and carry out pre-operational and safety checks, on tools, equipment and machinery
  • Select and use personal protective equipment
  • Discuss and confirm work-zone locations and areas with work team
  • Record and implement work health, safety, site, environmental and traffic control measures
       
Element: Design and prepare rigging system
  • Determine load limit of rigging system
  • Consider mass and dimensions of tree part, centre of gravity, dimensions in relation to working space
  • Calculate load and balance
  • Consider breaking strength and safety factor of equipment in use
  • Select appropriate anchor and attachment points
  • Determine impact of force under normal and failure conditions and apply safety factor
  • Design rigging system to allow for load and impact of force
  • Discuss rigging system with work team
  • Select appropriate rigging equipment and inspect for defects
  • Assemble, reassess and install rigging equipment
       
Element: Perform rigging operations
  • Communicate with work team during operations using voice, hand and whistle signals
  • Attach rigging and tie, dress, set and finish arborist knots
  • Test tensioned load
  • Identify problems, unsafe rigging practices and provide alternative rigging solutions
  • Monitor and adjust rigging system, taking into account environmental conditions
  • Control load and raise, lower or redirect as required and in a manner appropriate to worksite
  • Perform tip lowering, butt lowering, horizontal lowering and lifting as required
  • Operate lowering and friction devices as required
  • Match load frequency and size to processing capacity of ground crew
  • Process plant material and debris during rigging operations
  • Maintain effective communication with work team during rigging process
       
Element: Complete tree rigging operations
  • Check proper completion of rigging operations
  • Retrieve appropriate components of rigging system in a controlled manner
  • Clean and remove plant material and debris from site
  • Clean and check tools, equipment and machinery, and store
  • Clean and store personal protective equipment
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

Element

Performance criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare work site

1.1 Confirm location of worksite and location of correct tree as identified in scope of works

1.2 Obtain required site permits and licences

1.3 Determine location of above-and-below-ground services

1.4 Undertake a site-specific risk assessment by identifying work health and safety hazards and assessing risk

1.5 Ensure scope of works is within capacity and limits of team and equipment

1.6 Confirm first aid and rescue personnel, equipment and procedures applicable to tree work

1.7 Inspect tree and identify structural defects in relation to tree taxonomy, anatomy and physiology

1.8 Consider impact of wind speed and direction on rigging methods

1.9 Consider ‘cycles to failure‘ of load-bearing equipment

1.10 Select, prepare, and carry out pre-operational and safety checks, on tools, equipment and machinery

1.11 Select and use personal protective equipment

1.12 Discuss and confirm work-zone locations and areas with work team

1.13 Record and implement work health, safety, site, environmental and traffic control measures

2. Design and prepare rigging system

2.1 Determine load limit of rigging system

2.2 Consider mass and dimensions of tree part, centre of gravity, dimensions in relation to working space

2.3 Calculate load and balance

2.4 Consider breaking strength and safety factor of equipment in use

2.5 Select appropriate anchor and attachment points

2.6 Determine impact of force under normal and failure conditions and apply safety factor

2.7 Design rigging system to allow for load and impact of force

2.8 Discuss rigging system with work team

2.9 Select appropriate rigging equipment and inspect for defects

2.10 Assemble, reassess and install rigging equipment

3. Perform rigging operations

3.1 Communicate with work team during operations using voice, hand and whistle signals

3.2 Attach rigging and tie, dress, set and finish arborist knots

3.3 Test tensioned load

3.4 Identify problems, unsafe rigging practices and provide alternative rigging solutions

3.5 Monitor and adjust rigging system, taking into account environmental conditions

3.6 Control load and raise, lower or redirect as required and in a manner appropriate to worksite

3.7 Perform tip lowering, butt lowering, horizontal lowering and lifting as required

3.8 Operate lowering and friction devices as required

3.9 Match load frequency and size to processing capacity of ground crew

3.10 Process plant material and debris during rigging operations

3.11 Maintain effective communication with work team during rigging process

4. Complete tree rigging operations

4.1 Check proper completion of rigging operations

4.2 Retrieve appropriate components of rigging system in a controlled manner

4.3 Clean and remove plant material and debris from site

4.4 Clean and check tools, equipment and machinery, and store

4.5 Clean and store personal protective equipment

The candidate must be observed demonstrating rigging techniques for lowering, controlling and redirecting loads during tree pruning and tree removal.

The candidate must be assessed on their ability to integrate and apply the performance requirements of this unit in a workplace setting. Performance must be demonstrated consistently over time and in a suitable range of contexts.

The candidate must provide evidence for and demonstrate:

confirming location of worksite and location of correct tree as identified in scope of works

ensuring scope of works is within capacity and limits of team and equipment

obtaining required site permits and licenses

determining location of above-and-below-ground services

undertaking a site-specific risk assessment by identifying work health and safety hazards and assessing risk

inspecting trees and identifying structural defects in relation to taxonomic tree species, tree anatomy, and tree physiology

considering impact of wind speed and direction on rigging methods

considering ‘cycles to failure‘ of load-bearing equipment

selecting, preparing, and carrying out pre-operational and safety checks, on tools, equipment and machinery

selecting and using personal protective equipment

discussing and confirming work-zones locations and areas with work team

recording and implementing work health, safety, site, environmental and traffic control measures

communicating with work team during operations using voice, hand and whistle signals

determining load limit of rigging system

selecting appropriate anchor and attachment points

considering mass and dimensions of tree part, centre of gravity, dimensions in relation to working space

calculating load and balance

consider breaking strength and safety factor of equipment in use

determining impact of force under normal and failure conditions and apply safety factor

designing rigging system to allow for load and impact of force

discussing rigging system with work team

selecting appropriate rigging equipment and inspecting for defects

assembling and installing rigging equipment

identifying problems, unsafe rigging practices and provide alternative rigging solutions

maintaining effective communication with work team during rigging process

attaching rigging and using appropriate knots as required

monitoring and adjusting rigging system, taking into account environmental conditions

testing tensioned load

controlling load and raise, lowering or redirecting as required and in a manner appropriate to worksite

operating lowering and friction devices

performing tip lowering, butt lowering, horizontal lowering and lifting as required

matching load frequency and size to processing capacity of ground crew

retrieving appropriate components of rigging system

checking proper completion of rigging operations

cleaning and checking tools, equipment and machinery, replacing if faulty or worn, and storing

use of industry standard terminology to describe arboriculture, equipment and work environment.

The candidate must demonstrate knowledge of:

site-specific risk assessments

above-and-below-ground services

selection, tying methods and purpose of appropriate industry knots

types and purposes of a range of rigging equipment and devices

estimation of distances and dimensions of tree parts and equipment

estimation of centre of gravity for balancing a load

how to estimate areas for safe work zones

estimation of breaking strength, safety factor and cycles to failure

signals and communication systems

common problems and hazards with rigging and their potential consequences and solutions

breaking strain, safe working load and ‘cycles to failure’ for rigging equipment

anatomy, physiology, and taxonomy of tree species for a range of trees

how variations in weather such as wind speed and direction affect work

signs of equipment defects

structural defects in trees

operational use of lowering and friction devices

first aid and rescue personnel, equipment and procedures applicable to tree work.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Element

Performance criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare work site

1.1 Confirm location of worksite and location of correct tree as identified in scope of works

1.2 Obtain required site permits and licences

1.3 Determine location of above-and-below-ground services

1.4 Undertake a site-specific risk assessment by identifying work health and safety hazards and assessing risk

1.5 Ensure scope of works is within capacity and limits of team and equipment

1.6 Confirm first aid and rescue personnel, equipment and procedures applicable to tree work

1.7 Inspect tree and identify structural defects in relation to tree taxonomy, anatomy and physiology

1.8 Consider impact of wind speed and direction on rigging methods

1.9 Consider ‘cycles to failure‘ of load-bearing equipment

1.10 Select, prepare, and carry out pre-operational and safety checks, on tools, equipment and machinery

1.11 Select and use personal protective equipment

1.12 Discuss and confirm work-zone locations and areas with work team

1.13 Record and implement work health, safety, site, environmental and traffic control measures

2. Design and prepare rigging system

2.1 Determine load limit of rigging system

2.2 Consider mass and dimensions of tree part, centre of gravity, dimensions in relation to working space

2.3 Calculate load and balance

2.4 Consider breaking strength and safety factor of equipment in use

2.5 Select appropriate anchor and attachment points

2.6 Determine impact of force under normal and failure conditions and apply safety factor

2.7 Design rigging system to allow for load and impact of force

2.8 Discuss rigging system with work team

2.9 Select appropriate rigging equipment and inspect for defects

2.10 Assemble, reassess and install rigging equipment

3. Perform rigging operations

3.1 Communicate with work team during operations using voice, hand and whistle signals

3.2 Attach rigging and tie, dress, set and finish arborist knots

3.3 Test tensioned load

3.4 Identify problems, unsafe rigging practices and provide alternative rigging solutions

3.5 Monitor and adjust rigging system, taking into account environmental conditions

3.6 Control load and raise, lower or redirect as required and in a manner appropriate to worksite

3.7 Perform tip lowering, butt lowering, horizontal lowering and lifting as required

3.8 Operate lowering and friction devices as required

3.9 Match load frequency and size to processing capacity of ground crew

3.10 Process plant material and debris during rigging operations

3.11 Maintain effective communication with work team during rigging process

4. Complete tree rigging operations

4.1 Check proper completion of rigging operations

4.2 Retrieve appropriate components of rigging system in a controlled manner

4.3 Clean and remove plant material and debris from site

4.4 Clean and check tools, equipment and machinery, and store

4.5 Clean and store personal protective equipment

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Confirm location of worksite and location of correct tree as identified in scope of works 
Obtain required site permits and licences 
Determine location of above-and-below-ground services 
Undertake a site-specific risk assessment by identifying work health and safety hazards and assessing risk 
Ensure scope of works is within capacity and limits of team and equipment 
Confirm first aid and rescue personnel, equipment and procedures applicable to tree work 
Inspect tree and identify structural defects in relation to tree taxonomy, anatomy and physiology 
Consider impact of wind speed and direction on rigging methods 
Consider ‘cycles to failure‘ of load-bearing equipment 
Select, prepare, and carry out pre-operational and safety checks, on tools, equipment and machinery 
Select and use personal protective equipment 
Discuss and confirm work-zone locations and areas with work team 
Record and implement work health, safety, site, environmental and traffic control measures 
Determine load limit of rigging system 
Consider mass and dimensions of tree part, centre of gravity, dimensions in relation to working space 
Calculate load and balance 
Consider breaking strength and safety factor of equipment in use 
Select appropriate anchor and attachment points 
Determine impact of force under normal and failure conditions and apply safety factor 
Design rigging system to allow for load and impact of force 
Discuss rigging system with work team 
Select appropriate rigging equipment and inspect for defects 
Assemble, reassess and install rigging equipment 
Communicate with work team during operations using voice, hand and whistle signals 
Attach rigging and tie, dress, set and finish arborist knots 
Test tensioned load 
Identify problems, unsafe rigging practices and provide alternative rigging solutions 
Monitor and adjust rigging system, taking into account environmental conditions 
Control load and raise, lower or redirect as required and in a manner appropriate to worksite 
Perform tip lowering, butt lowering, horizontal lowering and lifting as required 
Operate lowering and friction devices as required 
Match load frequency and size to processing capacity of ground crew 
Process plant material and debris during rigging operations 
Maintain effective communication with work team during rigging process 
Check proper completion of rigging operations 
Retrieve appropriate components of rigging system in a controlled manner 
Clean and remove plant material and debris from site 
Clean and check tools, equipment and machinery, and store 
Clean and store personal protective equipment 

Forms

Assessment Cover Sheet

AHCARB310 - Perform aerial rigging
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

AHCARB310 - Perform aerial rigging

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: