On rock slopes, basic drapery systems or rockfall drapery are built to catch falling debris. At the base of these slopes, any infrastructure or installations may be in danger from this rockfall hazard.
Simple double twist rockfall drapery mesh is a tried-and-true, cost-effective option when the anticipated rock fragments are larger than the mesh’s aperture and smaller than around 0.5m in diameter. In order to keep falling debris behind the rockfall netting, our mesh literally “drapes” over the rock slope. It is allowed to fall in a regulated manner to the base of the rock slope.
The mesh should be kept as near to the slope as feasible on moderately steep slopes or slopes where some vegetation may develop. At the top and bottom of the slope, the mesh is fastened.
Our grid HR systems can be utilised as high strength drapery systems where significant loads on the drapery are anticipated (high slopes and debris volumes, snow/ice loads). This innovative mesh, which reduces project costs and time on the rock-face or slope, is a designed combination of double twist steel wire mesh and high tension wire ropes in a single, simple-to-install product.
Compared to other mesh systems, such as welded mesh or high tensile strength single twisted mesh systems (chain link type), the double twist mesh has a number of advantages.
- The double twist mesh is adaptable and may, if necessary, follow the slope of the rocks.
- Unlike single twist (chain link) style meshes, which might get tangled in themselves during deployment, it is simple to unroll on the rock face.
- It is isotropically flexible and won’t unravel even if some wires unintentionally break. Regardless of the strength and type of wire employed, single twist mesh cannot offer the same level of safety in the event of wire breakage.
- For installations where high slopes or significant volumes of debris are anticipated, drapery mesh is offered with tensile strengths up to 160kN/m.
