| 摘要 |
442,166. Floors. HOLLAND & HANNEN & CUBITTS, Ltd., 1, Queen Anne's Gate, London, and ARNOLDI, F. SCHNEIDER-, 1a, Rheinstrasse, Rodenkirchen, near Cologne, and MECKEL, J., 64, Olpenerstrasse, H÷henberg, Cologne, Germany. Aug. 15, 1934, No. 23550. [Class 20 (iv)] A floor comprises a number of hollow spaces situated between an upper layer of concrete and a lower ceiling layer comprising concrete which, during the pouring of the upper layer, has passed through perforations or reticulations in a member or members defining the upper limit of the hollow spaces. In one construction employing steel or other pre-formed beams, a layer of perforated material, such as perforated sheet metal, wire mesh, or woven wire work, is supported across the tops of the beams, and some of the concrete, which is cast on to this perforatedmaterial to form the upper concrete layer, is adapted to pass through the perforations in the material on to a layer of perforated material supported beneath the beams so as to form the ceiling layer. In another construction, hollow bodies d of perforated material are arranged in spaced relation on a layer c of perforated sheet metal, wire mesh or expanded metal carried by a shuttering b, as shown in Fig. 2. The bodies are tied by wires to the layer c and may be interconnected by hooks or wires. Reinforcing bars e are laid in the spaces between the hollow bodies and concrete f is cast between and above the hollow bodies. The concrete which passes through the perforations in the hollow bodies forms a layer of “" to ¢" in thickness. The hollow bodies may be of woven wire, or they. may be built up of a number of perforated sheets tied together by wire h, as shown in Fig. 4. A further form of hollow body is of cylindrical shape constituted by a perforated wall g and a flanged and perforated top j, as shown in Fig. 7. If desired, one or more hollow bodies may be supported between adjacent I-beams on a layer of perforated material. The floor may be formed of pumice concrete.
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