Chapter 16- Climbing and Working In Trees Flashcards
List 4 defects that might be found during rope inspection that would require a rope to be retired.
Cuts, excessive fraying puffs, pulled fibers, abrasions, changes in diameter, discoloration, glazing of the fibers.
Before climbing a tree, a climber should inspect the tree for hazards such as
Broken limbs Electrical hazards Dead limbs Decay Splits
The load on any piece of climbing or rigging equipment can be many times higher than the weight of the climber or the limb being rigged.
True
Tensile strength
Force at which a new piece of equipment or rope in testing fails in tension under a static load.
Friction-saving
reduces the wear on the rope and damage to the tree and can, in some cases, facilitate climbing.
Figure-8 knot
Particular knot tied as a safety knot or stopper knot at the end of a line.
Stopper knot
Knot, usually a figure 8 knot, tied in the end of a line or in the tail of a knot to prevent the end or tail from passing through the knot.
Hitch
A type of knot made when a rope is secured around an object or its own standing part. Contrast with bend.
Bend
Type of knot used to join 2 rope ends together. Contrast with hitch.
2 methods of using a climbing line to to ascend a tree are ______-______ and ________ _________
Body thrust, secured footlock.
When footlocking, putting the hands on or above the Prusik hitch could cause it to slide down the climbing line, creating a fall.
True
Because _______ ______ can damage a tree, they are approved for use only on trees to be removed, or for aerial rescues.
Climbing spurs
For added stability and safety, a climber should be secured with a ______-_____ _______ in addition to the climbing line when using a chain saw in a tree.
Work positioning lanyard
The most important factor in any aerial rescue situation is speed—getting the victim to the ground in the shortest amount of time possible.
False
Rigging
The use of ropes and other equipment to take down trees or remove limbs.
_______-______ ropes are not recommended for natural-crotch rigging, where the friction of the cover with the trees causes an imbalance in the load taken by the core and cover braids.
Double-braid
Design factor
Factor by which the rated or minimum breaking strength or tensile strength is divided by in determining its working-load limit.
Caribiners must always be loaded along their ______ _____ and never across the gate.
Major axis
Arborist block
Heavy duty pulleys with a large rotating sheave for the lowering line, and a smaller, fixed sheave to accept a rope sling.
Rescue pulleys
Light duty pulley used in light rigging operations.
Natural crotches can be fast and effective for use as a rigging point, but the consistent friction and versatility of placement of an arborist block is often a great advantage.
True
When the piece must be removed without dropping either the butt or tip, it can be tied so it is _________, then lowered to the ground.
Balanced
Butt hitching
Method of lowering pieces when the rigging point is below the work, traditionally without the use of a block.
Drop cut
Branch removal technique consisting of an undercut and then a top cut, usually made farther out on the branch or with a chainsaw, directly over the undercut.
