J.S.A
Jobsite Safety Assessment. Otherwise referred to as the tailboard, job site safety analysis or F.L.H.A field level hazard assessment. This is a legal document which highlights specific hazards and how to mitigate those hazards unique to a job site. It must be completed and include all crew members. It is the primary document used to cover assets, facilitate team communication and plan the work safely.
M.R.S
Moving Rope System, the rope in this system moves over or through the tie in point when in use.
R.A.D
Rapid Ascent and Descent, simply allows for a rapid transition between ascent and decent. This system often incorporates a 3 to 1 mechanical advantage to lift the climber.
Cinch
A running bowline is an example of a cinching knot. A cinch has the ability to be tighted in one direction and loosened in another.
Choke
A choke is loaded equally from both sides and grabs securley around the object it is tied too. An example of a choking configuration would be a choking friction saver.
Canopy Anchor
An anchor point within the upper scafolds, trunk and branches of a tree.
Basal Anchor
An primary life support point placed at the bottom of of a tree usually at the base of the pedestal.
Primary Line
This is the main rope being used for suspension, work positioning and life support.
Secondary Line
This is a second (Separate) line available for life support, suspension or work positioning. This may also be a line free for use in aerial rescue operations as a safety line.
Lanyard
This is a independent rope system carried with the climber which can be used for work positioning, suspension and back up life line. When an arborist begins cutting it is best practice to have both primary life line and lanyard being used simultaneously. This ensures two points of attachment and usually passes through the vertical and horizontal planes of a climbers view.
W.L.L
Working Load Limit of a component, software or hardware. This is usually calculated by a safety factor using the minimum breaking strength (MBS) of the component. It is usually 5:1 or 10:1 safety factor. This is the safe acceptable load which can be applied while working. The WLL and MBS are usually stamped or marked onto the component.
M.B.S
Minimum breaking strength is the amount of force reached when the component may start to fail, bend or break. An individual component, hardware or software should never experience a force equal to the MBS in a working scenario. The WLL and MBS are usually stamped or marked onto the component.