| 摘要 |
380,880. Floors ; hollow blocks. BAUER, F., 19, Johannesstrasse, Stuttgart, Germany. July 16, 1931, No. 20379. Convention date, July 16, 1930. [Classes 20 (iv) and 87 (i).] Hollow arched floor blocks to fit between reinforced concrete girders, Fig. 1, are formed on the sides with one or more projections e which are unsymmetrical with respect to the central vertical plane, and the blocks in a row are alternately reversed to produce a toothing to key with the concrete filling f. The blocks may be inserted from below by turning them about one end and locking them in place by a separate piece k, Fig. 5. |
