Space grid structures are appropriate to cover large areas. They allow the realization of plain roofs. To improve the transparency of such structures a new type of sustainable und transparent double layer grids is developed. The strict replacement of all bars in the compression layer by glass panes significantly increases the transparency and saves material. The contribution describes the geometry finding for such structures. Basis for the research is the structure geometry of steel space grid structure that is extended to transparent space grids. As result of the research a full-scale mock-up of the most appropriate structure was built to demonstrate the feasibility.