AC-Ch. 16 Tree Climbing Flashcards
Climbing line installed in a tree to gain access to but not used to work in the tree
Access line
Heavy duty pulley with an integrated connection point, a rotating sheave for the rope and extended cheek plates. Used in tree rigging operations
Arborist block
Piece of gear that enables a climber to ascend a rope. Attached to the rope it will grip in one direction and slide in the other.
Ascender
In rigging a technique for lowering a limb without allowing either end to drop
Balance
Type of knot used to join two rope ends together
Bend
Ratio of the diameter of an object to the diameter of the rope that is wrapped around it
Bend ratio
Curve or arc in a rope between the working end and the standing part.
Bight
Heavy duty pulley used in rigging. Designed for dynamic loads
Block
Casing enclosing one or more pulleys
Block
Post on which wraps can be taken with a rope to tie it off or to provide friction for control
Bollard
Method of lowering pieces when the rigging point is below the work traditionally without the use of a block.
Butt hitching
Connecting device. Oblong metal ring used in climbing and static rigging that is opened and closed by a spring loaded gate.
Carabiner
Hitch used to secure a tree climber to the climbing line, which permits controlled ascents, descent and work positioning.
Climbing hitch
Rope that meets specifications for use in tree climbing
Climbing line
Work positioning harness designed for climbing trees.
Climbing saddle
Sharp devices strapped to a climber’s lower legs to assist in climbing poles or trees being removed.
Climbing spurs
Factor by which the rated or minimum breaking strength of a rope or piece of equipment is divided by in determining its working load limit
Design factor
Rope construction consisting of a braided rope within a braided rope both of which carry part of the load
Double braid
Branch removal technique consisting of an undercut and then a top cut usually made farther out on the branch or with a chain saw directly over the undercut
Drop cut
Forces created by a moving load. Load that changes with time and motion.
Dynamic loading
Device used to take wraps in a load line to provide friction for controlled lowering or climbing
Friction device
Rope construction consisting of a braided rope with no core.
Hollow braid
Short rope equipped with carabiners, snaps and/or eye splices. Used for temporarily securing a climber in one place.
Lanyard
Rope used to lower a tree branch or segment that has been cut. Lowering line
Load line
Small, light duty pulley used in climbing operations. Often used as a knot tender
Micro pulley
Method of using ropes and hardware in tree pruning or removal, to control or direct the descent of cut material or to handle heavy loads.
Rigging
Rope usually the load line used in rigging operations
Rigging line
Placement in the tree or any other point through which the load line passes to control rigging operations
Rigging point
Length of rope, usually with at least one eye splice, used to secure equipment or tree sections in rigging operations.
Rope sling
Connecting device with a threaded closure mechanism. Used to secure equipment or tree sections in rigging operations.
Screw link
U-shaped fitting with a pin running through it. Clevis.
Shackle
Inner fitting within a block or pulley over which the rope runs.
Sheave
Dynamic, sudden force placed on a rope or rigging apparatus when a moving load or piece is stopped.
Shock-loading
Set of methods used to ascend on a single rope as opposed to the doubled rope commonly used in secured footlocking techniques or dynamic climbing systems.
Single rope technique
Connecting device used by tree climbers primarily for connecting the climbing line to the saddle.
Snap
Separate, short length of rope used to tie the friction hitch in a climbing system
Split-tail
Inactive part of a rope.
Standing part
Force at which a new piece of equipment or rope in testing fails in tension under a static load
Tensile strength
Tying a line on the tip end of a branch to be removed.
Tip-tied
End part of a rope used for rigging and climbing.
Working end
Tensile strength divided by design factor. Maximum load that should not be exceeded in a piece of equipment, rope or rope assembly when performing its normal working function
Working load limit
Lanyard used in climbing, often as a secondary means of attachment.
Work positioning lanyard
Second climbing line hung in a tree in case it is needed to reach a victim in an emergency
Access line
