As a rule, the load on a ceiling by a partition wall is taken into account as a line load below the partition wall. Under certain conditions, however , the load from light, non-load-bearing partition walls may be applied to the ceiling as a uniformly distributed surface load, i.e. as an addition to the payload. This means that no beams are required below the walls and the wall positions are flexible, so they can be changed at any time later.
prerequisite for the application of the partition wall surcharges is that the ceiling construction allows the loads to be distributed laterally. This is the case, for example, with appropriately designed reinforced concrete ceilings .
Source: bauwion