By means of accurate calculations, no. 13 hydraulic jacks with a max capacity of 20 T have been placed, each, under the structure. A metal structure was made to distribute the thrust of all the jacks and, once the frame has been lifted with a pressure distributor of suitable capacities, it was proached to keep it at a new altitude in a definitive way. Thanks to this intervention it was possible to intervene and to restore the height difference due to a slight failure of the load bearing structure. 
