Patent GB-483273-A (GB)
Title: Improved material for use as lathing and reinforcement in building constructions andin concrete structures such as road foundations
IPC: E04F13/04
Filed: 1936-10-10
Abstract: 483,273. Walls, floors, roofs, and like structures ; road surfaces ; lathing. JOHN, A. S. Oct. 10, 1936, No. 27551. [Class 20 (iv)] A lathing or other building-material for use in keying a plaster or cementitious layer to form a floor, ceiling. wall, roof, road or like surface comprises a plain and flat supporting sheet 1, Fig. 6, which is formed of a fibrous material, such as paper-board, paper, or fabric, and is provided on one face only thereof with a reinforcing and keying structure consisting solely of parallel, or substantially parallel, rigid laths 2 of stamped metal shaped so as to key with the subsequently-applied plastic material. The supporting sheet, which may be flexible or relatively stiff, is provided with no corrugations, grooves, or the like and may be treated so as to be damp-proof; the laths 2 may be secured to the sheet by bitumen or other waterproof adhesive. The laths, which may be of mild steel, are shaped to a somewhat trough form, the base being grooved at 6 and the outwardlyinclined sides being provided with curved edges 7 as shown in Figs. 2 and 4. The sides of the laths are also provided with raised portions 11 and /or bent-out tongues 9, 10, and each of the latter may be so shaped that the base thereof is at an angle to the axis of the lath, and one of the cuts adapted to provide a lateral edge of the tongue is parallel to such axis. The laths are provided with a plurality of holes to enable the sheet to be nailed in position where desired. The laths may be arranged transversely across a long supporting sheet or strip, which, together with the laths, may be rolled into small bulk, and the laths may project beyond one or both edges of the sheet. Adjacent sheets may be so arranged in position that the laths are continuous over the whole surface, or staggered, and, in the latter case, the spacing of the laths may be such that the projecting portions of the laths of adjacent sheets interengage. The sheets may be arranged so that the laths extend transversely across the studs, joists or rafters and be secured thereto by nails, bolts, or rivets. For floors, the sheets may be applied to the upper faces of the joists, and, for concrete road and floor surfaces, which may subsequently receive any desired paving, the sheets may be secured to a concrete base by a bituminous adhesive. In the case of partitions, the cement coating is applied in two coats 3, 4, Fig. 6, the second of which is finished in gypsum plaster or lime putty. For outside walls, two or more coats of Portland cement may be applied, followed by a final " pebble-dash " or other finishing coating ; if desired, the material may be applied to both faces of studding and provided with the desired cementitious coats, and the internal. space may be filled with concrete. The Provisional Specification describes also the coating of a supporting sheet of wood fibre or the like with a substantial thickness of bitumen, the laths being secured by tongues stamped out from the laths and embedded in the bitumen.