| 摘要 |
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.
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