| 摘要 |
<p>The invention provides for a removable former which is interlockable with other, similar formers between spaced-apart ribs to form shuttering between the ribs for a reinforced concrete slab. The former includes a hollow block (110) which has a top face (112), a front face (114), a rear face, two opposed side faces (116) and an interlocking flange (118) on or below each of the side faces for interlocking the hollow block, side by side, with adjacent, similar hollow blocks. The interlocking flanges (118) extend from the side faces (116) so that when the hollow block is interlocked with an adjacent hollow block, a gap is formed between adjacent side faces of the interlocked blocks. The former also includes a support member (122) for supporting the hollow block (110) on two of the spaced-apart ribs during casting of the concrete slab. The support member (122) includes a pair of connectors (124) which are arranged to connect the support member to the front and rear faces of the hollow block (110) and to extend outwardly from the front and rear faces for engaging the two ribs during casting of the concrete slab. The support member (122) also includes two restraining limbs (128) which are connectable to one another for restraining inward displacement of the connectors and hence the front and rear faces of the hollow block (110) during casting of the concrete slab. A plurality of openings (134) are provided for drawing the connectors (124) off the ribs after the concrete has set.</p> |
