Page 3 - Demo

Name at least 2 potential hazards related to insufficient undercut depth of less than 25%.
o Potential loss of directional control o Stump pull
o Hinge points change
o Harder to wedge the tree, increasing
MSI
Notes:
Name a least 2 potential hazards related to excessive undercut depth over 40%.
o Difficulty with wedging
o Increased weight on wedge o Weight shifts early
o Tree could fall prematurely o Barberchair
What are the percentages related to undercut selection when applying the kickback step?
For Humbolt?
o Above the undercut to a maximum
height of 5%
For Conventional?
o Minimum height 5% and maximum
height 10%
Assessment
¨ Outcome met
¨ Outcome NOT met
Assessment Result
¨ Outcome met
¨ Outcome NOT met
Reassessment
¨ Outcome met
¨ Outcome NOT met
Reassessment
¨ Outcome met
¨ Outcome NOT met