Buildings, not of metal, masts [poles], not of metal, barriers, not of metal, concrete panels, non-metal pipes; rigid pipes made of concrete, rigid pipes made of asbestos cement, rigid pipes made of glass fiber reinforced polyester, rigid gutters made of glass fiber reinforced polyester, rigid pipes made of glass fiber, rigid pipes made of polyethylene, rigid water pipes made of concrete, rigid water pipes made of asbestos cement, rigid water pipes made of glass fiber, rigid water pipes made of glass fiber reinforced polyester, rigid waste water pipes made of concrete, rigid waste water pipes made of asbestos cement, rigid waste water pipes made of glass fiber, rigid waste water pipes made of glass fiber reinforced polyester; non-metal panels for constructions, non-metal beams, columns made of concrete, non-metallic roof elements, prefabricated structures made of concrete, portable structures made of concrete, concrete made poles, fence posts, electric and telephone poles made of concrete, concrete barriers, road bollards; non-metallic, non-mechanical and non-illuminated traffic signs for roads; monuments, sculptures made of concrete, stone or marble; glass products for construction; non-metal prefabricated swimming pools; aquarium sands.;