| 摘要 |
1,173,926. Moulding building elements. H. KOBAYASHI. 21 Dec., 1966 [21 Dec., 1965; 11 July, 1966; 19 Aug., 1966; 23 Aug., 1966], No. 57307/66. Heading B5A. [Also in Division E1] In casting a concrete slab (see Divisions E1-E2), in which form bodies 8, (9), Fig. 11, are wholly embedded, the forms 8, (9) are arranged on support members above a bottom plate of a slab form so that by casting concrete into the slab form, the forms 8, (9) may be enclosed by the concrete except at the underside thereof between the support members. The slab so formed is then inverted and, after removal of the said bottom plate and support members, the resulting cavities are filled with concrete to completely embed the forms 8 (9). In the construction of a further embodiment of a cast slab, characterized by an opening 27, Fig. 31, formed by a frame, the frame is strengthened by reinforcing members 28 and rigid bars 30 so that the opening will not be deformed when tension is applied to prestressing wires in the slab.
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