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ISO 22846-2-2012 pdf free download

ISO 22846-2-2012 pdf free download.Personal equipment for protection against falls — Rope access systems — Part 2:Code of practice
Equipement individuel de protection contre les chutes — Systèmes d’accès par corde — Partie 2: Code d’application. Installers of anchors, which are fixed in concrete slab, rock and masonry, should be aware of a number of safety issues. e.g. minimum distance required between anchors, minimum distance from any edge, correct depth, and specific requirements for solid or hollow masonry. They should therefore be suitably trained and competent. Where possible, anchors should be installed so that they are loaded in shear, extreme care should be taken before deciding to place any drilled-in (to masonry or stone) anchor in a situation where it is expected to be loaded in axial tension. Where dead-weight (ballast-type) anchor systems are used, particular account should be taken of cantilever or frictional effects. It is especially important to be aware that wet or icy conditions can significantly affect the frictional performance of anchor-weight systems. and lateral movement can become unpredictable. The frictional resistance of any anchor weight should be assured by checking that it does not move whenever subjected to a load of four times that which is applied in a work-positioning situation. A higher factor is required if a fall arrest situation is envisaged. If the ballast weight is being used to resist overturning, the manufacturer should be consulted to obtain correct weight requirements. Where counterweighted anchors are used, particular care should be taken to ensure that the device is designed and counterweighted for the potential loads caused by a potential fall. Additionally, the surfaces on which the device is mounted should also be suitable for the significantly higher loads of a potential fall over those normally encountered in the working situation. Sometimes, it is necessary to re-anchor a line, e.g. to avoid a sharp edge or to allow a change of direction, Where possible, re-anchors should be installed so that any potential loads are in shear. Where it is only possible to install anchors in such a position that any forces on them are axially orientated, account should be taken of any reduction in strength caused by such placement and of any advice or limitations that can be placed upon the anchor by the manufacturer. In a multipoint anchor system, the angle formed by the lines between the bight and the two anchors should be as low as possible and should generally not be more than 900 and never beyond 1200 (see Annex D). The greater the angle, the greater the force there on the anchors. If circumstances dictate the need for an angle greater than 90°, account should be taken of the increased forces at the anchors, at the anchor line terminations and on other components in the system. The angle should never exceed 120°, unless specifically designed for this purpose. Because of the weakening effect, the feeding of anchor slings or other slings, or strops through themselves (known as lark’s footing or choking) should be avoided, unless they are specifically designed to allow this. To meet the recommendations given in this part of ISO 22846, operatives need a separate working line and safety line. Each line should be attached to its own anchor point. These may be connected to each other for added security. A single element of a structure, e.g. structural steelwork, a natural geological feature or a tree can have adequate strength to provide a place for anchor points for both the working line and safety line. This should be verified by a competent person.ISO 22846-2-2012 pdf free download.

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