Inspection

Tree hazard assessment

Tree hazard assessment (ISA/TRAQ style): tree characteristics, health, site conditions, target, defects (roots, lean, decay), overall hazard rating and recommendations (pruning, cabling, felling, notification). Structured data capture, supporting the requirements of ISO 45001 on the hazard and risk-reduction aspects.

control points
79
anchored clauses
0
Clauses covered
7

Clauses covered

Tree characteristics4
Tree health8
Site conditions14
Target4
Tree defects14
Hazard rating4
Recommendations8

Scale

Generally symmetricalMinor asymmetryMajor asymmetryStump sproutDeclining crownDominantCo-dominantIntermediateSuppressedYoungSemi-matureMatureOver-mature / senescentCrown cleanedOver-thinnedToppedCrown raisedPollardedCrown reducedFlush cutsCabledMultiple pruningsNoneNormalChloroticNecroticYesNoSparseSmallExcellentAverageLowFairStakesWires / tiesSignsCablesKerb / pavementGuardsResidenceCommercialIndustrialParkOpen spaceNaturalWoodland / forestRoadsideRaised bedContainerMoundLawnShrub bedWindbreakN/AConstructionSoil disturbanceGrade changeLine clearance pruningLand clearingAdequateInsufficientExcessiveWaterlogged trunk0%10-25%25-50%50-75%75-100%DrainageShallowCompactedDrySalineAlkalineAcidicLow volumeDisease focusHistory of failureOtherLightingSignageLine of sightViewOverhead linesBuried servicesTrafficAdjacent vegetationIsolated treeBelow the canopyAbove the canopyRecently exposedWindward canopy edgeWindthrow-prone areaEastWestSouthNorthBuildingParkingPedestriansRecreationLandscapeHardscapeSmall featureUtility linesOccasional useIntermittent useFrequent useConstant useSevereModerateUnnaturalSelf-correctedAnnualHalf-yearly1 - low2 - medium3 - high4 - severe1 - < 15 cm2 - 15-45 cm3 - 45-75 cm4 - > 75 cm1 - occasional2 - intermittent3 - frequent4 - constantRemove the defective partReduce end weightClean the crownThinRaise the crownReduce the crownRestructureShapeRoot collarDecayAerialMonitoringTo be assessedOwnerManagerCompetent authority

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Published by NormePulse — HEMC, management consulting firmUpdated

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