AHCARB213 — Perform ground-based rigging

Elements & performance criteria

Performance evidence

• 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.
• 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).

Knowledge evidence

• 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.

Foundation skills

• Writing: Complete reports and records using clear language and industry terminology to ensure clarity of meaning
• Oral communication: Use open and closed questions logically to clarify work instructions Use industry terminology to communicate with team members
• Get the Work Done: Respond to routine problems using step-by-step procedures when safely setting and preparing rigging and checking and maintaining rigging equipment

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Questions about assessing AHCARB213