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What is the difference between a hard hat and a safety helmet?

Hard hats are intended to reduce the forces of impact from a blow to the top of the head. Not only are multi-impact tested helmets designed and tested to reduce the force of an impact from a blow to the top of the head, but they are also designed to reduce the forces from lateral impact coming from an off-centre, side or top of the head strike during a fall.

For work at height, it is essential that in the event of an uncontrolled fall, the helmet is retained on the head. Selecting the correct helmet with multi-impact and penetration testing standards most appropriate to your working application is essential.

What is the fall distance factor? When a fall arrest system is being used, the potential free-fall distance should be less than two metres. Energy-absorbing lanyards should not be used in conjunction with inertia reels as this can result in an excessive distance of fall prior to the fall being arrested.

There should be sufficient distance between the work surface and any surface below to enable the system, including the action of any shock absorber, to deploy fully.
What is a pendulum effect?

The pendulum effect is a potential hazard resulting from lateral movement or swing during a slip or fall. Appropriate positioning of single anchorage, diversionary anchors or the horizontal lifelines can reduce the risk of a pendulum effect in the event of a fall.

What is a rope access systems? A rope access system commonly employs a working line and a safety line. The working line, on which the operator is suspended under tension during ascent and descent, is the primary means of access. Depending on the mass of the operator, the anchor is subject to a continual force of 1-2kN, which should be applied in a static manner. 
What is a total restraint system? A total restraint system is a full-body harness that is connected by an energy-absorbing lanyard to a suitable anchorage point or horizontal lifeline. The system is set up to keep the worker from reaching the edge.
What is a fall arrest system? A fall arrest system is designed to support and hold a person in the event of a fall. It is not a work positioning system as they are not designed to support a person while working.
What is a work positioning system? Work positioning systems enable a person to work supported in a harness under tension in a way that a fall is prevented. Generally the arrangement allows for the worker to maintain a stable position and to work hands-free while completing a task.
Who can inspect height safety PPE? All components of personal fall protection/fall arrest systems must be inspected by a competent person at intervals of no more than six months. Inspection reports must be recorded on a formal Inspection Log, and filed for safekeeping.
How often does my height safety PPE need inspecting?

All items of equipment which are in regular use shall be subjected to periodic formal inspection (test and tagging) and where applicable, servicing in accordance with the manufacturer’s instructions.

Fall arrest devices (type 1).
Ropes & adjusters/fall arrest devices (Linostop, positioning devices).

Lanyards with shock absorbers.
Retractable webbing lanyards.
All ropes (finished & cut lengths Shock absorbers).
Webbing sling anchors, temporary static lines Work positioning lanyards.

Anchors, Line & Rail systems.
Tripods, pulleys, hardware Self-retracting lifelines/inertia blocks  (type 2 & 3).

how do I clean my webbling PPE? Personal protection equipment should be cleaned periodically using a specialist cleaner or a mild detergent and water. Wash with a soft, non-abrasive brush or sponge and allow to air dry after removing the excess water with a dry cloth.
Can I continue to use my height safety PPE if it has been impacted from a fall? Immediately withdraw from use any equipment that has been impacted or been used to arrest a fall.
What training do I need to work at height? Ensure this Height Safety equipment is prescribed/fitted/attached according to current government health & safety at work guidelines and that you are adequately trained in its use.
Can I carry out repairs on my height safety PPE? Do not add to, adapt or repair using components that are not recommended or approved by the manufacturer. Return equipment to manufacturer for servicing.