A building space divider system for providing one or more rooms in a building space, the building space divider system comprising at least two framework beams and coupling strips, in which the framework beams extend in a longitudinal direction, and the framework beams include longitudinal beam coupling parts where two of the framework beams are back-to-back coupled via the coupling strips, each coupling strip comprising two strip parts each having a beam coupling end extending along a longitudinal side of the strip part for coupling to the beam coupling part of the framework beam, and a strip coupling end extending along an opposite longitudinal side of the strip part.