MULTI-STOREY BUILDINGS

In a multi-storey building of which the walls and floors are erected from prefabricated panels, each wall panel extends from one to the other of two adjacent floors and the opposite ends of each floor panel are supported respectively, upon the upper edges of panels in two adjacent parallel walls, a plurality of continuous, vertical ducts, each extending the full height of the building, is formed in each of the walls and the floor panels supported thereby, a co-extensive reinforcing member in each duct is bonded to the surface of the duct by a solidified fill surrounding the member and forced, before solidification, into the lower end of the duct, and the floor panel ends supported by each internal wall are castellated, the tongues of the castellations are shorter than the thickness or are located wholly between the faces of the respective wall panels and are narrower than the pockets in the castellated ends, and each of the tongues is engaged in and is located symmetrically to a corresponding one of the pockets in the adjacent castellated end of another of the floor panels and is bonded to the pocket by a solidified fill inserted, before solidification, into clearances between the sides and tip of the tongue and the sides and floor of the pocket.