Defines test procedures for determining the mechanical performance of precast concrete floors made of a single piece, or made up of precast joists (reinforced concrete or precast concrete) completed with filler blocks and concrete poured in situ. The parameters measured are: the maximum load, which does not result in collapse, the instantaneous and deferred deformations under imposed load, and the maximum load which the floor or its constituent precast element can support without collapse during its construction. Applies to floors designed to support loads of less than 5000 N m^-2 and having spans of less than 12 m.