| 摘要 |
<p>A. generally elongated load bearing pre cast structural element for usc in the construction of a composite floor and beam slab construction, the structural element comprising when viewed in end or cross section; 10 a base having an underside surface and an upper surface, at least two spaced apart tapered dovetail formations each extending from the upper surface at a web junction and each including a plateau and a side wal defining, in conjunction with a base and an opposing side wall of an adjacent formation, a tapered recess. The side walls are disposed at an acute angle to 15 the upper surface of the base of the structural element; wherein the plateau width dimension of each said formations as viewed in cross section is at least twenty per cent greater than a width dimension of a corresponding web junction of each said formations and the base; the tapered recess forming a void space which is capable of receiving a light weight filler; the structural 20 element capable of load bearing when simply supported at each end and having a high strength. to weight ratio.</p> |
