Edge Restraint Flashcards
(22 cards)
What is considered an unsecured area in QFR?
Any environment within three metres of a vertical edge with no physical protection to prevent falls.
What must all QFR personnel be secured with when operating within 3m of an unprotected edge?
An edge restraint system that physically prevents them from being exposed to a risk of a fall.
What are the two points of contact (POC) required near an edge?
- Effective/solid contact of feet on ground
- An enclosed LRL line, secured to a bomber anchor.
What defines an enclosed system in edge safety?
When the lines are tied and terminated onto the technician’s harness.
What is the purpose of a restraint technique?
To control a person’s movement by physically preventing them from reaching the edge or a position at risk of a fall.
What must be considered when determining if secure footing can be maintained?
- Slope of the surface
- Supporting material type
- Texture of the surface
- Likelihood of being wet, oily, or slippery.
When is it not suitable to use a restraint technique?
- User can reach a position where a fall is possible
- User has a length-adjustable restraint line
- Danger of falling through a fragile surface
- Slope is over 15 degrees
- Any other misuse that could lead to a free fall.
List some common restraint techniques.
- AZTEK edge restraint
- LRL with adjustment Prusik
- Single LRL belay.
What is the AZTEK edge restraint used for?
To allow the user to approach an edge while preventing them from reaching a position at risk of a fall.
What is a key requirement when using the AZTEK edge restraint?
A travel-limiting knot must be placed in the line.
What are the limitations of the AZTEK edge restraint?
It is not rated for fall arrest and can only be used for edge restraint.
What is the LRL with adjustment Prusik method?
An improvised method of the AZTEK edge restraint using an LRL, which must be an enclosed system.
What is a significant danger of using the LRL with adjustment Prusik?
It has extremely limited shock-absorbing capacity and is not a fall arrest system.
Describe the Single LRL belay method.
Uses a single LRL system through a belay device to lower the technician and lock them securely in place.
What is fall arrest?
A system that protects the technician once a fall has occurred.
What is the most common fall arrest device used in QFR?
ASAP.
What must be done before using the ASAP within 3m of an uncontrolled edge?
Tie a stopper knot to prevent moving into a position where a fall is possible.
What is a tensioned lifeline?
A fall arrest system used to move multiple people through an unprotected area on a horizontal plane.
What are the requirements for using a tensioned lifeline?
- Only one lifeline can be used in an area with anchors up to 20m apart
- Risk of increased fall due to deflection
- Only one person on the span at a time.
What is an un-tensioned lifeline?
A fall arrest system that allows multiple people to move through an unprotected area without the span limitation of a tensioned lifeline.
What must be done during the setup of an un-tensioned lifeline?
- Use intermediate anchors no more than 3m apart
- Ensure high-risk situation is addressed during setup.
What is the first step in setting up an un-tensioned lifeline?
Check the rope, tie a stopper knot in the tail end, and anchor the LRL in the safe area.