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Rockfalls

Rock Fall Barriers and drapes are systems that can be installed when the goal is to control the material coming off the rock slope rather than stabilizing it in place.

Rock Fall Barriers
There are several different types and manufacturers or Rock Fall Barriers. The two types are broken into 2 different categories, solid barriers and flexible barriers. Solid barriers can be concrete walls, earth berms, Jersey Barriers, etc. Flexible barriers are engineered to catch the falling rock while dissipating the energies throughout the system to immobilize the block. When designing such a system for a specific site it is important to remember that because they are flexible systems, upon impact, they can extend several meters past the line of the posts before being immobilized. When you get up to the high energy systems they may need as much as 7 meters behind the barrier as a buffer for this expansion.

Rock Fall Drapes
There are several types of materials that can be used as a rock fall drape. It is important to perform a proper survey and determine the size of block that will be dislodged from the rock face before determining which material should be used. There must be sufficient catchment area to allow for the accumulation of the rock as it is dislodged from the face.

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