Structures for producers of plants and agricultural crops. Inside, commercial plantations of vegetables, fruits, flowers, mushrooms, etc are implemented. As each type of culture has different needs, the structures differ radically. Most of them are special tunnels, made on order. These customized structures are perfectly adapted to the type of crop harvested. A commercial greenhouse is a sterile and modifiable environment. For the farmer, this means that the foil enables to shape the micro-climate inside.