[ Non-metallic building materials, non-metallic articles for use in building and construction, non-metallic construction elements and materials, modular non-metallic structures, modular prefabricated building units of non-metallic materials for the construction of buildings, modular structural units, not of metal, for the construction of prefabricated buildings, non-metallic building components, non-metallic building elements, and articles of ceramics for building purposes, namely, non-metall...