Средства индивидуальной защиты Hoffmann Group 2026 - страница 443

GBP 57 When personal protective equipment is used to limit injuries due to falls, the target is always: limit the drop distance. Without an energy absorber, even a drop of 0.5 m creates a force on the person equivalent to a drop weight of 1.2 t. With an energy absorber the force is equivalent to a maximum of up to 600 kg. This weight determines the force of the arrest shock, which can cause serious injuries to the wearer. The drop factor corresponds to the relationship between the drop length and the system length. The force of the arrest shock increases with the drop factor. In the ideal case the drop factor should be ≤ 1. Example A: Example B: Example C: A badly chosen anchor point generates a drop Here a drop length of 2 m is Here a drop length of 0 m is achieved length of 4 m. achieved by the well positioned by the well positioned attachment attachment point. point and the safety harness. Drop Drop length 2m + 2m 4m Drop Drop length 2m Drop Drop length 0m = = = =2 = = =1 = = =0 factor System length 2m 2m factor System length 2m factor System length 1m Example A illustrates how the high drop factor results in Examples B and C show how the correct positioning of the attachment point means that a long braking distance which leads almost certainly to the fall is safely checked and the distance from the ground is significantly increased. serious injury. Furthermore, the drop factor and the forces arising from the arrest shock are significantly reduced. Height of the attachment point 6 m Height of the attachment point 7 m Height of the attachment point 8 m – 2.00 m system length – 2.00 m system length (above head height) – 1.75 m braking distance – 1.20 m braking distance – 2.00 m combination of the length of the – 1.80 m body height – 1.80 m body height system and length of the body = 0.45 m distance from the ground = 2.00 m distance from the ground = 6.00 m distance from the ground Attachment point EN 795 Attachment point EN 795 Attachment point EN 795 Connectors Connectors Connectors with ennergy absorber with energy absorber retractable type fall arrester to EN 354/355 to EN 354/355 to EN 360, tensioned 8m approx. 1.00 m approx. 1.80 m System length approx. 2.00 m System length Body height System length = drop length approx. 2.00 m 6m approx. 4.00 m Drop length Distance from the ground approx. 6.00 m approx. 2.00 m System length Braking distance approx. 1.20 m 4m Braking distance approx. approx. 1.80 m 1.75 m Body length 2m Schematic depiction. Distance from the ground Amongst other things the approx. 1.80 m Body length safety distance, the approx. 2.00 m movement of the eye on the harness and the stretching of the rubber material must be taken into account. from the ground approx. 0.45 m Distance 443