Specifi city of precast fl oor design, on the example of the hollow-care slabs

Precast floors are gaining more and popularity in modern construction, mainly due to their fast realization. However, the provisions of standards regarding floor design often ambiguous sometimes questionable. The article discusses selected issues HC slabs design, which pose problems practice, with references relevant scientific research this field. Particular attention was paid principles distribution concentrated load on adjacent field, openings floors, support conditions taking into account slab function as an element a floor.