AHCARB320 — Install tree support systems

Elements & performance criteria

Performance evidence

• installed three different types of tree support systems according to a specification, including: steel cable, textile or synthetic cable, bracing
• interpreted plans and specifications and determined the materials, tools and equipment required for tree support system work
• identified health, safety and environmental hazard and risks and implemented controls for the installation, including: conducted and completed a job safety analysis (JSA), prepared and used personal protective equipment (PPE), maintained awareness of above-ground hazards while performing work
• assembled tree support system ready for installation
• examined structural integrity of the tree
• determined and confirmed the safest access to location of the tree support system
• pruned tree to aid tree support system installation
• accessed the tree safely and secured into work position
• removed, checked, maintained, cleaned, sanitised and stored tools and equipment according to biosecurity procedures
• recorded and reported completed works

Knowledge evidence

• preferred industry practices (as outlined in the Companion Volume) for tree support systems
• the effect of pruning on tree growth, habit and form
• tree anatomy and tree physiology related to tree support systems, including: pruning techniques appropriate to tree species and their response, natural habit and form of trees, visual tree assessment, tree defects and tree support system solutions
• tree support systems principles and techniques suited to tree species, including: steel cabling, synthetic cabling, bracing
• impact of tree support system on trees, including: the impact on the tree’s natural range of movement, the impact on the tree’s strategy of flexibility, the impact on the tree’s formation of reactive growth
• tree support system materials, tools and equipment, including: preparation of steel cabling systems and terminations, including eyes, swaging, wire whipping, components and preparation of synthetic cabling systems, hardware, including installation requirements for eye bolts, lag hooks, wire stops and grips, cable types and sizes, tensile strength and selection criteria as related to arborist specifications, preparation of bracing components, including types of rod, threading, terminations and tensile strength, cable tension and tensioning methods, finishing techniques of cables for aesthetics and function, finishing techniques of bracing for safety, aesthetics and function, checks and adjustments to installed systems over time
• identification of workplace health and safety hazards, risk assessment and risk control application
• selection of suitable PPE
• completing a job safety analysis (JSA)
• first aid and rescue personnel, equipment and procedures applicable to tree work
• monitoring and managing above-ground hazards
• electrical safety
• principles of compartmentalisation of decay in trees (CODIT) in relation to the installation of cables and bracing
• hygiene practices and biosecurity when cable bracing, including: reasons for managing hygiene, biosecurity principles and procedures, record keeping and reporting procedures for cable bracing

Foundation skills

• Reading: Interpret and consolidate information from plans and specifications for design requirements and prepare for the installation of tree support systems
• Writing: Accurately record and complete organisational documents, including job safety analysis (JSA) and records, using clear language and correct spelling, grammar and industry terminology
• Numeracy: Interpret and calculate numerical information from specifications to determine the size and dimensions of materials required to construct tree support systems

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Questions about assessing AHCARB320