CEN/TC 50 Lighting columns and spigots CEN/TC 125 Mansonry CEN/TC 128 Roof covering products CEN/TC 164 Water supply CEN/TC 165 Wastewater engineering CEN/TC 166 Chimneys CEN/TC 177 Prefabricated reinforced components of autoclaved aerated concrete or lightweight aggregate concrete with open structure CEN/TC 178 Paving units and kerbs CEN/TC 226 Road equipments CEN/TC 229 Precast concrete products CEN/TC 246 Natural stones CEN/TC 256 Railway applications