Non-metal structures for mounting solar panels or photovoltaic plants, non-metal ballasts, namely, mounts for solar panels or photovoltaic plants; substrates, not of metal, being profiles and frames for supporting solar cells, photovoltaic cells and solar collectors; reinforcing materials, not of metal, for building purposes for solar or photovoltaic plants; construction elements not made of metal, namely, supports for solar panels or photovoltaic plants; rigid pipes, not of metal; framework,...