Is the seismic grade of beam and slab of a project the same?

In general, it is not necessary to check the seismic performance of the floor. The function of floor slab in earthquake is to enhance the integrity of structure and restrain the out-of-plane rotation of beam.

Generally speaking, it is beams, columns and walls that need to determine the seismic grade. If there are three types of members in a structure at the same time, then the beam is the first line of defense against earthquake, the column is the second line of defense, and the wall is the last line of defense.

If you must dig deep, the seismic grade of the slab is the same as that of the beam.