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This European standard deals with the requirements, the basic performance criteria and evaluation of conformity for precast floor plates made of reinforced or prestressed normal weight concrete according to EN 1992-1-1:2004, used in conjunction with cast-in-situ concrete (topping) for the construction of composite floor slabs. Annex B gives different types of composite slabs made with floor plates. These floor plates, with or without void formers, can include lattice girders or stiffening ribs incorporated during the precasting. They shall be manufactured in factories by casting, slip forming or extrusion. If major part of mechanical resistance is taken up by the precast stiffening ribs, the product belongs to EN 1168 or to EN 13224, according to the section. The products covered by this standard are intended to be used as part of structural floors in applications such as: floors and roofs of buildings (including industrial and storage buildings, public buildings as schools, hospitals, etc.); parking/circulation areas; cover for culverts; etc. Floor plates for bridge decks belong to the scope of EN 15050 and are not covered by this European Standard. The products may be used in seismic areas provided they fulfil the requirements specific to this use. This standard does not cover: reinforced !and prestressed floor plates with a nominal thickness less than 40 mm; prestressed floor plates with a nominal thickness less than 50 mm without stiffening ribs or lattice girder; floor plates with a very smooth upper face, such as defined in 6.2.5 of EN 1992-1-1:2004.