Fatzer Ag

Marcel Sennhauser

A shock absorbing device for a cable under tension, in particular for rockfall, debris flow and avalanche control works, is equipped with an elongate, helical deformation element (), through which the cable () can be looped. Both overlapping end areas () of the deformation element () are guided through a holding element (), and the deformation element () is plastically deformable when the cable is overloaded, by reducing the helical diameter. The holding element () has bevels or roundings () at the entry and exit of an opening () formed for the overlapping end sections () of the deformation element (). The effect of this is that the reduction of the helical diameter can progress more consistently than before, and also the load-damping curve can be defined better.

Shock absorbing device for a cable under tension, in particular for rockfall, debris flow and avalanche control works

A catchment net (), especially for rockfall blocking, includes a net () consisting of elements that engage with each other, and whose two longitudinal sides are each moveably held by a holding rope () extending between at least two support bodies (). The two holding ropes () are moveably held by the individual support bodies () in their longitudinal direction and tensioned at the side. At least one running rope () or suchlike extending alongside the support body on each of the holding ropes () preferably within the area of the each support body () is affixed with one end on one side and with the other end on the other side to the support body (). The net () is moveably held within the support body area by the running ropes (). The catchment net () therefore guarantees an optimal load distribution as well as a more favorable flow of energy through the net.

Catchment net, especially for rockfall blocking

A catchment net for rockfall catchment systems or the like has a net ( ) and support elements ( ). The net ( ) is retained on the outside, on at least two mutually-opposing sides, by least one peripheral cable ( ) in each case, and/or by a tensioning cable ( ). Additional connection elements ( ), which connect the net ( ) to the support elements at its outside, make it possible for the energy incurred in the event of a rock ( ) or the like falling into the net to be absorbed to the maximum. The connection elements can, however, also be secured additionally or only in the interior of the net.

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Frasnacht, Switzerland

Marcel Sennhauser