Interlocking metal sheets for use as roofing and/or walling and/or decking

Claim 1

Interlocking metal sheets for use as a form and reinforcement for concrete poured thereon to provide when the concrete is set, a reinforced composite slab for building construction, each said sheet including upstanding ribs formed throughout the length thereof in parallel spaced relationship, and upstanding interlocking clips formed one on each opposite edge of the sheet throughout the length of the edge, each rib comprising a pair of oppositely spaced legs upstanding from the plane of the sheet, the space between said legS providing a fastener receiving opening for attachment of building components to said slab, said legs being set inwardly into abutting relationship above the sheet and that portion above the abutting parts being formed into an inverted triangular head, said abutting parts including reinforcing bulges formed in spaced relationship therein throughout the length of said abutting parts, said bulges extending from the upper part of the spaced legs to adjacent the apex of the inverted triangular head at right angles to the longitudinal axis of said ribs and serving to connect the sheets to the set concrete so as to prevent separation thereof particularly in a longitudinal or tensile direction of the metal sheets, the edge interlocking clips each comprising one leg of a rib, one leg of a triangle with the head extended to the full width of the base of the triangle and having a downwardly, inwardly flanged hook formed on the outer end for interlocking engagement with the clip of the next adjoining sheet.