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High up in an area of defences with the upper Cover terminal of a works cableway photo Chapter III
4a 4b and 4c Different shapes of starting transit
Recognition of avalanche risk
88 other sections not shown
altitude anchorage anchoring angle artificial release ation avalanche defences avalanche release average braking structures built cable calculations coefficient of friction compression construction contour line cornice creep and glide crossbeams curve damage defence structures deformation deposit zone depth hoar determined deviating dry-stone wall effective example of loading explosive extra load extra marginal load extreme heights Figure forces forest formula fracture frame fresh snow gallery glide factor gradient ground guidelines gulleys height of snow increase kinetic energy length longitudinal beam measured metres normal observations obstacle parallel perpendicular Photo placed possible pressure of snow protection release of avalanches rock safety shear strength shear stress slab slope snow avalanches snow bridges snow cover snow creep snow H snow height snow pressure snow rakes snowfall soil specific gravity speed stabilizing structures starting zone stress allowed superstructure support surface supporting pillar Switzerland thickness of snow velocity vertical walls wind baffle winter