Preliminary Risk Analysis (PRA) is a fundamental procedure to ensure the safety and effectiveness of tree pruning , removal and other arboricultural activities that involve working at height . This analysis allows the arborist to identify and assess possible risks before starting any activity, ensuring safe and efficient planning for the team and the surrounding area.
Why is APR Essential in Arboriculture Work?
The APR is used to identify hazards such as proximity to power lines, venomous animals, unstable ground or compromised trunks. In the context of tree pruning and chainsaw work , it is crucial that the arborist understands all the risk variables involved to avoid accidents, protect assets and ensure the safety of all professionals involved.
The execution of an APR is required by standards such as NR 35 (Work at Height) and NR 12 (Chainsaw Operation), as well as by the ABNT 16246-1 and ABNT 16246-2 guidelines for arboriculture activities. These regulations define the safety standards that must be followed by professionals working in the area of tree management.
APR Stages in Arboriculture Work
Activity Identification Clearly define the work to be performed, such as tree trimming or suppression . Describe the site characteristics and the specific tasks to be performed.
Hazard Identification Assess the risks related to the environment and the activities to be carried out. This includes hazards such as falling branches, proximity to structures, presence of venomous animals and adverse weather conditions. During pruning or removal , it is important to check the health of the tree and the presence of hollow trunks or exposed roots.
Risk Assessment Classify risks based on severity and likelihood of occurrence. For work with chainsaws or at height, it is necessary to analyze the risk of falling, excessive vibrations and the possibility of crushing limbs.
Risk Control Measures Establish control measures for each identified risk, such as the use of personal protective equipment (PPE) and collective protective equipment (CPE) , isolation of the work area and use of ropes to control falling branches.
Communication and Training All those involved must be aware of the risks and control measures adopted. Training such as NR 35 for working at heights and NR 12 for operating chainsaws are essential for the qualification and training of arboriculture professionals.
Monitoring and Review Monitor activities as they are being performed and revise the APR if there are changes in environmental conditions or scope of work. Continuous monitoring allows for quick adjustments to ensure operational safety.
Examples of Common Risks in Tree Pruning and Removal
Falling Branches : Identify and tie branches before cutting to prevent accidental falls.
Chainsaw Risks : Always check the condition of the chainsaw (manual chain brake, chain catch pin, hand guards and safety lock).
Proximity to Power Lines : Prune in ideal wind conditions and maintain a safe distance from cables.
Fall from Height : Always use parachute-type safety belts with double lanyards and maintain correct anchorages during climbing.
Performing a Preliminary Risk Analysis (PRA) is essential to ensure the safety and efficiency of arboriculture work, such as tree pruning , removal and working at height . APR protects workers, reduces the risk of accidents and promotes a safer and more productive work environment.
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