A coupled moredimensional catastrophic avalanche model has been developed in cooperation with the Austrian Torrent and Avalanche Control (BMLFUW, WLV, 1989), the AVL (Research Institute for Internal Combusting Engines) in Graz, the department of Fluid Dynamics TU (Technical University) in Vienna, and the Institute for Avalanche and Torrent Research at the Austrian Federal Forest Research Station (FBVA) in Innsbruck. The results of the model are in good agreement with mapped field studies of natural disasters (Hufnagl, 1988). This mathematical model is used to forecast the run-out distance of the avalanche, the flow height, the height of deposition, as well as the vertical distribution of densities, velocities and total pressures. For the last year this model has been used as a tool to solve engineering problems (high way-protection) in cableway constructions such as the influence of designs relating to the behaviour of catastrophic avalanches. On the hand of three case studies by means the results of the SAMOS model is reported (Galtuer disaster 1999, tunnel bridge Gruber valley and the affectivity of a catching dam for road protection).