Rock sheds is one of the main engineering solutions for mitigating rockfall disaster in the mountainous regions of western China. Typically. the roof of a rock shed is covered with a soil cushion composed of sand or gravel. The function of soil cushion is to avoid the direct impact of rockfall on the shed and absorb the impact force of the falling rocks. https://www.marketingjeunesse.com/product-category/9-12-9bv/