The main upgrade activity on ALICE during LHC's Long Shutdown 1 was the installation of the dijet calorimeter (DCAL), an extension of the existing EMCAL system that adds 60° of azimuthal acceptance opposite the existing 120° of the EMCAL's acceptance. This new subdetector will be installed on the bottom of the solenoid magnet, which currently houses three modules of the photon spectrometer (PHOS). Moreover, an entirely new rail system and cradle will be installed to support the three PHOS modules and eight DCAL modules, which together weigh more than 100 tones. The installation of five modules of the TRD will follow and so complete this complex detector system, which consists of 18 units,