Materials such as sand, gravel, crushed stone, asphalt, bitumen, cement and plaster used for construction, road construction, repair and coating purposes; building materials made of concrete, gypsum, clay, potters' clay, natural and artificial stone, wood, plastics and synthetic materials and shaped for building, construction, road construction and similar purposes, non-metallic buildings, non-metallic building materials, structures, poles, barriers (including doors and windows made of wood a...