The precast concrete floor member can be divided into or without extension reinforcement.

The design and calculation method of the laminated plate is determined whether the construction stage is reliable or not. Set the reliable support of laminated slab, precast concrete in weight and construction load, so as not to influence the internal force and deformation, according to the overall design computation of bending members; unsupported laminate, weight and construction load of two forming concrete pouring affected the internal force and deformation, according to the two stage of stress the laminated member design.

The concrete stacked floor technology means that the floor is divided into two parts along the thickness direction, the bottom is the prefabricated floor, and the upper part is poured into the concrete stack layer. The precast floor with the bottom reinforcement is used as a part of the floor. During the construction stage, as the post poured concrete overlay, the formwork bears the load and forms a whole superimposed concrete component with the post poured concrete layer.

Precast concrete slabs according to the concrete stress state, divided into the uniaxial stress and biaxial stress of laminated plate; prefabricated according to whether the protruding bar can be divided into "bearded bars" and "no beard tendons; seam according to connections can be divided into separate joints (i.e. not open floor between the close fight") and integral joints (bottom between post concreting zone).

According to the pre cast floor reinforced types can be divided into precast concrete slab and precast prestressed concrete floor precast concrete slab using non prestressed reinforcement, in order to enhance the stiffness of the truss reinforced concrete floor; precast prestressed concrete floor for prestressed concrete slab and prestressed concrete, prestressed concrete hollow slab with rib.

When the span is more than 3m precast reinforced concrete floor slab should adopt the truss or prestressed concrete slab, the span is greater than 6m should adopt the precast prestressed concrete ribbed floor slab and prestressed concrete hollow slab, floor slab thickness greater than 180mm should be used for prestressed concrete hollow slab.