Patent GB-495314-A (GB)
Title: Improvements in or relating to building constructions
IPC: E04B2/84
Filed: 1937-05-05
Abstract: 495,314. Walls; girders ; posts. MORAN, T. W. May 5, 1937, Nos. 12802 and 16820. [Classes 20 (i) and 20 (iv)] A wall comprises a main framework of steel stanchions 11 and steel beams 12, 13, a subsidiary framework comprising posts 17 and/or beams made partly or wholly of a light-weight nailable concrete, a backing 29 of relatively flexible or bendable sheet-material secured by nailing to the subsidiary framework, and a cementitious rendering applied to the backing. The posts and beams of the subsidiary framework are reinforced by steel rods and may be composed of cement, sand, and a light-weight material such as pumice, clinker, foamed slag, or the like. The backing may consist of jute, hessian, or, as shown in Fig. 4, cardboard 29 reinforced on one face with wire mesh 30, with or without additional metal stiffener ribs 31. The reinforcement may be that known under the Registered Trade Mark " Steeltex." The posts 17a, 17b, 17c, Fig. 1, are mounted between the steel beams 12, 13, and are secured to the latter by cleats which partly or wholly embrace the posts. The posts may be placed against the beams 13 as shown, or they may be placed between, and flush with, these beams. At the edges of the backing 29, the metal reinforcement 30 may, as shown in Fig. 4, lap further across the faces of the posts 17 than the backing itself so as to allow the cement rendering to bond with the posts. At the main stanchions 11, the backing, which in this case is pre-formed, is carried around the stanchion and spaced therefrom as shown at 38 in Fig. 4. To allow for expansion and contraction of the rendering, the posts 17 may be fixed in such a manner as to be movable parallel to the plane of the wall, such movement being allowed, for example, by making the post-securing cleats larger than the posts, or by fixing these cleats to the beams by bolts passing through slotted or otherwise enlarged holes. The members of the subsidiary framework may also be provided with projecting pins or wires to serve as additional means for attaching the backing ; these frame members may also be formed with longitudinal recesses to receive part of the cement rendering. The cement rendering may be applied in two-layers and by means of a cement-gun. The wall formed as described above may constitute the outer wall of a building or the internal lining of a wall formed of corrugated sheeting. The main framework may be constituted by horizontal members secured on both sides of vertical members, and the subsidiary framework may be applied to both sets of horizontal members so that, after application of the backing and cement, a cavity wall is formed. The Provisional Specifications describe also the use, as the sole supporting means for the backing, of wires or other members anchored in the posts or beams and projecting beyond the faces thereof ; such wires may take the form of U-shaped stirrups, the base portions of which are embedded in the posts or beams. The first Provisional Specification also describes the posts or beams as provided with a surface reinforcement in the form of woven jute, hessian, or paper or cardboard reinforced by wire-mesh, and the aggregate employed in forming the posts or beams may be coke-breeze, ashes or sawdust. The second Provisional Specification describes also the provision in the posts or beams of wood nail-receiving laths.