Assessor Resource

AHCARB213
Perform ground-based rigging

Assessment tool

Version 1.0
Issue Date: May 2024


This unit of competency describes the skills and knowledge required to select, check and install rigging systems to support aerial tree work for the controlled descent of loads to drop zone. This unit does not cover crane operations.

The unit applies to individuals working in a broad range of arboriculture contexts who undertake defined routine activities under supervision. They exercise limited autonomy within established and well known parameters, providing solutions to a limited range of predictable problems.

The arboriculture industry requires that all ground-based tree rigging work is undertaken according to preferred industry practices (as outlined in the Companion Volume).

Legislation, regulations and by-laws relating to the treatment and removal of trees apply in some states and territories.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)


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.

An individual demonstrating competency must satisfy all of the elements and performance criteria in this unit.

There must be evidence that the individual has installed rigging equipment and controlled at least six loads from an aerial location to the drop zone using ropes, knots and rigging system appropriate for the load dimensions and mass.

There must also be evidence that the individual has:

confirmed work instructions and location of worksite

identified site hazards, assessed risks and confirmed controls with supervisor including:

selected, checked and used appropriate personal protective equipment

confirmed the availability of first aid and emergency equipment, personnel and procedures

implemented workplace health, safety, environmental and traffic control measures

contributed to tree assessment process by assessing trees for defects

checked and removed defective equipment from service

monitored rigging system, work team movements and environmental conditions for safe work conditions

communicated with work team and discussed and confirmed rigging method and rigging equipment during operations using agreed communications methods

tied, dressed, set and finished arborist knots according to rigging task, including demonstrating the following knots:

alpine butterfly knot

bowline on the bight

cow hitch with better half

clove hitch and two half hitches

half hitch pre-knot

klemheist friction knot

marline pre-knot

marline spike hitch

riggers knot and two half hitches

running bowline

sheet bend

slippery sheet bend

timber hitch

zeppelin bend

controlled load to drop zone, adjusting rigging according to aerial worker instructions and disconnected load from rigging system

returned rigging components to aerial work team after checking components for defects

confirmed completion of rigging operation with aerial work team and removed and dismantled rigging system including:

cleaned, checked and stored tools and equipment from worksite

reported and tagged defective tools and equipment

recorded and reported rigging outcomes according to workplace procedures.

All ground-based tree rigging work is required to be performed according to preferred industry practices (as outlined in the Companion Volume).

An individual must be able to demonstrate the knowledge required to perform the tasks outlined in the elements and performance criteria of this unit. This includes knowledge of:

current industry practices (as outlined in the Companion Volume) for ground-based tree rigging work and tree dismantling

safe operations in ground-based rigging, including:

first aid, emergency personnel, equipment and procedures

workplace health, safety, site, environmental and traffic control measures

identification of ground-based hazards

above ground hazards and risk

personal protective equipment

monitoring the safety of working conditions

procedures for tree assessment before rigging operations, including tree examination for tree defects

ground-based rigging procedures and practices, including:

rigging equipment and its performance

rigging methods and rigging systems

examination of rigging equipment for defects, and procedures to manage defective equipment

assembling and installing rigging equipment

checking rigging equipment

tying, dressing, setting and finishing arborist knots for rigging

communications strategies used in arboriculture, including:

voice

hand

whistle signals

electronic communications

communications specific to the rigging task

techniques for controlling, raising, lowering and redirecting loads, including balancing load on centre of gravity

cleaning, storing and maintaining tools and equipment

records and reporting procedures for rigging operations.

Assessment of the skills in this unit of competency must take place under the following conditions:

physical conditions:

worksite with aerial tree operations or environment that accurately represents workplace conditions

resources, equipment and materials:

rigging equipment

static and dynamic rope systems

harnesses

lowering and friction devices

high decibel whistle

personal protective equipment

first aid and emergency kit

rescue kit

specifications:

access to current preferred industry practices (as outlined in the Companion Volume) for ground-based tree rigging work and tree dismantling

workplace and manufacturer instructions for safe operation of rigging equipment

relationships:

supervisor and aerial work team.

Assessors of this unit must satisfy the requirements for assessors in applicable vocational education and training legislation, frameworks and/or standards. In particular, assessors must have:

arboriculture vocational competencies at least to the level being assessed

current arboriculture industry skills directly relevant to the unit of competency being assessed.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, 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.

An individual demonstrating competency must satisfy all of the elements and performance criteria in this unit.

There must be evidence that the individual has installed rigging equipment and controlled at least six loads from an aerial location to the drop zone using ropes, knots and rigging system appropriate for the load dimensions and mass.

There must also be evidence that the individual has:

confirmed work instructions and location of worksite

identified site hazards, assessed risks and confirmed controls with supervisor including:

selected, checked and used appropriate personal protective equipment

confirmed the availability of first aid and emergency equipment, personnel and procedures

implemented workplace health, safety, environmental and traffic control measures

contributed to tree assessment process by assessing trees for defects

checked and removed defective equipment from service

monitored rigging system, work team movements and environmental conditions for safe work conditions

communicated with work team and discussed and confirmed rigging method and rigging equipment during operations using agreed communications methods

tied, dressed, set and finished arborist knots according to rigging task, including demonstrating the following knots:

alpine butterfly knot

bowline on the bight

cow hitch with better half

clove hitch and two half hitches

half hitch pre-knot

klemheist friction knot

marline pre-knot

marline spike hitch

riggers knot and two half hitches

running bowline

sheet bend

slippery sheet bend

timber hitch

zeppelin bend

controlled load to drop zone, adjusting rigging according to aerial worker instructions and disconnected load from rigging system

returned rigging components to aerial work team after checking components for defects

confirmed completion of rigging operation with aerial work team and removed and dismantled rigging system including:

cleaned, checked and stored tools and equipment from worksite

reported and tagged defective tools and equipment

recorded and reported rigging outcomes according to workplace procedures.

All ground-based tree rigging work is required to be performed according to preferred industry practices (as outlined in the Companion Volume).

An individual must be able to demonstrate the knowledge required to perform the tasks outlined in the elements and performance criteria of this unit. This includes knowledge of:

current industry practices (as outlined in the Companion Volume) for ground-based tree rigging work and tree dismantling

safe operations in ground-based rigging, including:

first aid, emergency personnel, equipment and procedures

workplace health, safety, site, environmental and traffic control measures

identification of ground-based hazards

above ground hazards and risk

personal protective equipment

monitoring the safety of working conditions

procedures for tree assessment before rigging operations, including tree examination for tree defects

ground-based rigging procedures and practices, including:

rigging equipment and its performance

rigging methods and rigging systems

examination of rigging equipment for defects, and procedures to manage defective equipment

assembling and installing rigging equipment

checking rigging equipment

tying, dressing, setting and finishing arborist knots for rigging

communications strategies used in arboriculture, including:

voice

hand

whistle signals

electronic communications

communications specific to the rigging task

techniques for controlling, raising, lowering and redirecting loads, including balancing load on centre of gravity

cleaning, storing and maintaining tools and equipment

records and reporting procedures for rigging operations.

Assessment of the skills in this unit of competency must take place under the following conditions:

physical conditions:

worksite with aerial tree operations or environment that accurately represents workplace conditions

resources, equipment and materials:

rigging equipment

static and dynamic rope systems

harnesses

lowering and friction devices

high decibel whistle

personal protective equipment

first aid and emergency kit

rescue kit

specifications:

access to current preferred industry practices (as outlined in the Companion Volume) for ground-based tree rigging work and tree dismantling

workplace and manufacturer instructions for safe operation of rigging equipment

relationships:

supervisor and aerial work team.

Assessors of this unit must satisfy the requirements for assessors in applicable vocational education and training legislation, frameworks and/or standards. In particular, assessors must have:

arboriculture vocational competencies at least to the level being assessed

current arboriculture industry skills directly relevant to the unit of competency being assessed.
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 work instructions and location of worksite with supervisor 
Confirm workplace health and safety hazards and controls in job safety analysis (JSA) with supervisor 
Confirm availability of first aid and emergency personnel, equipment and procedures 
Identify tree defects and contribute to tree assessment process 
Discuss and confirm rigging method with work team 
Confirm rigging method complies with identified risk controls with supervisor 
Select rigging equipment and check for defects, removing defective equipment from service 
Select, check and use personal protective equipment 
Communicate with work team during operations according to work site and environmental conditions, using methods agreed with work team 
Tie, dress, set and finish rigging knots and hitches according to rigging system requirements 
Monitor rigging system, work team movements and environmental conditions to ensure safe working conditions 
Control load to drop zone and adjust rigging according to aerial worker directions 
Disconnect load from rigging system 
Re-check rigging equipment components for defects, and remove defective equipment from service 
Return rigging components to aerial work team 
Confirm completed rigging operations with aerial work team 
Remove and dismantle rigging system from tree 
Clean, check and store tools, equipment and machinery according to workplace procedures 
Report and tag defective tools and equipment 
Clean and store personal protective equipment 
Record and report rigging operation outcomes according to workplace procedures 

Forms

Assessment Cover Sheet

AHCARB213 - Perform ground-based 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

AHCARB213 - Perform ground-based 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: