The new 5 MN Hexapod-Shaped Multicomponent Build-Up System (HSM-BUS) represents a significant progress in the field of reference transducers in the high force range. As any build-up system, the presented HSM-BUS can lead not only to measure forces 5 times higher than the capacity of a each single Uniaxial Force Transducer (UFT), but gives also information about the other components of the force vector and of the moment vector. The goal of the project is mainly to enhance the internal traceability of INRIM force laboratory up to 5 MN, using the HSM-BUS as reference force transducer up the range of 5 MN. Additionally, since this type of BUS is a multicomponent, it would also be used to minimize the spurious component of the force applied by the Standard Force Machine during the calibration of uniaxial force transducers.