Abstract: A module readily assembled roofing system for overlying a base structure, e.g. of a house or building, comprising a plurality of elongated modules of identical cross-section, each support including a principal body member defining a planar upper surface for the support and means defining a guideway or keyway aperture accessible from the undersurface of the support. The support also includes a planar web member extending from the principal body member and a locking member engaged to the free edge of the web member, including a terminal bead at the upper end of the locking member. The locking member mates with the guideway within an adjacent module such that one module is slideably received in mating relation within the guideway of an adjacent module to lock adjacent supports against vertical displacement. The web members are coupled to the base structure as by rivets, and a plurality of overlying covering members are affixed to the top surface of the body members.

Abstract: The wall construction is prefabricated from self-connectable elements divided each into four compartments by cross-pieces and each comprising a first hollow elements with a square frame forming also cross-pieces and diagonal ribs. The first hollow element has on one side protruding fingers for cooperating with a facing plate formed with holes corresponding to the protruding fingers, the diagonal ribs protruding on other side of the frame and being each formed with at least one notch complementary to that of the similar diagonal ribs carried by a second element made in the same manner as the first element but closed on its side opposite to that form which protrude the diagonal ribs so that said second element forms a facing surface.