GroGreen GEO GRID B 1100 129246 12.9' x 246' GGS 1100 Geogrid - GGS 1100 is an integrally formed biaxial geogrid made of extruded 100% polypropylene. The load transfer mechanism is a positive mechanical interlock. GGS 1100 is primarily used for base reinforcement or subgrade improvement. GGS 1100 resists ultraviolet deterioration, rotting, biological degradation, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13.