Abstract: Means are provided for reinforcing the assembly of facing slabs of an industrialized house. They comprise essentially a fish-plate bridging the joint formed between adjacent slabs. The slabs are provided with holes in which socket-nuts are sunk for engagement by the tightening bolts passing through holes formed in the fish-plate and provided with several radial slits forming as many blades adapted, when the bolts are tightened, in order to provide dome-shaped projections acting as punching means in the cavities. The bolt heads exert a pressure against lugs engaging with one end the flange of a post of the frame structure of the house and with the other end the fish-plate; preferably a distance-piece is provided between the lug and the blades of the corresponding hole.