Hazard Tree Felling - Hang-ups

Category: 
Felling Safety
Page Last Modified / Reviewed: 
Dec 2017

 

hazard-tree-hang-ups. Photograph looking up into tree tops and seeing one tree leaning up against another.Felling a hung-up hazard tree is a particularly hazardous and complex task. Safely felling a hang-up requires extreme caution and expertise.

The following are some topics sawyers should review during tailgate safety discussions to address felling hang-up hazard trees:

Size up and Evaluation:

  • Cut/No Cut (walk-a-way). Is tree secure and does it need to come down?

  • What type of hang-up? In a fork, pinched between two trees or resting on limbs?

  • Vertical hang-ups have increased complexities.

  • Condition of all relevant trees; live, dead, rot, etc.Does the hang-up tree have any weak areas that could fail?

  • Obscured view of top?

  • If sawyer is unsure of outcome do not attempt to cut leaner.
     

Operational Considerations:

  • Escape routes for unforeseen circumstances?

  • Consider falling trees as a group.

  • Consider face cuts versus slash cuts for directional control.

  • Rope Technique allows increased distance from danger zones
     

Alternative Mitigations:

  • Blasting

  • Heavy equipment/cable

  • No Work Zones
     

Discuss any personal lessons learned with hang-up trees that you may have experienced.

 

Additional Resources

Incident Management Situation Report (IMSR)
Incident Response Pocket Guide (IRPG), PMS 461
NWCG Standards for Helicopter Operations, PMS 510
RT-130, Wildland Fire Safety Training Annual Refresher (WFSTAR)
Interagency Standards for Fire and Fire Aviation Operations (Red Book)
Wildland Fire Lessons Learned Center

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