The article describes the strengthening of wooden floor structure. A woodcutter's chain saw was used to make cuts from the extrados (1st job segment) and then from the intrados in the damaged beams, giving the floor structure rocking and sliding device and mounting it on steel sleds. The upper reinforced concrete slab was made to work with the rest of the structure using metal pins anchored in the beams and in the reinforced perimetral curbing and the walls. Structural solidity between the steel laminas and the wood beams was attained by using steel bolts mounted transversely, and epoxy resin. The assembly operations for the second job segment were minimal.