Steel and Plastic Geogrid (GSZ 30-30) The GSZ stell and plastic geogrid can supply alinking system to soil, which be used broadly to enable the permanent bearing capacity of roadbed. The product breakthrough the traditional intensity of geogrid, vertically and horizontally approaches the intensity( 20KN/m--150KN/m). The breaking and elongation ration is low( is not higher than 3%). It is suitable in every kind of soil environment. In the production process, when treating the plastic surface, the rib is pressed into rough pattern to strengthen the rough degree of the grill surface. This can enhance the friction between the the GSZ and the soil. It can reduce construction joining, and enhance the work efficiency, reduce the marerial and the construction cost. (1)strengthening road and railway base. Improve loading of road and railway base. (2)extending the usage validity. Prevent surface of road and railway from breaking. (3)Reducing the maintaining charges. Shorten the construction time. (4)It can prevent land soil from sinking, including embankment, slopes, tunnel, airfields, parks, docks and so on. (5)It can tighten slopes to proof water and soil from losses. (6)It can reduce the surface thickness of the ground base.