| 摘要 |
<p>An apparatus (10) for forming voids (22) in concrete including baseplates (12) secured to a wood supporting deck of form (18) for a concrete floor (20) by a plurality of short wood screws (30). An adjustable sleeve assembly (14) is attached to each baseplate (12) and is adjustable to a height generally equal to the thickness of the floor (20) with the upper end of the sleeve (40) being accessible and observable when concrete is poured. After the baseplates (12) have been secured in place, various subsequent work procedures may be carried out without the workers encountering obstructions that would exist if upwardly projecting cavity forming members were attached to the wood deck and the sleeve assemblies are mounted prior to pouring the concrete. After the concrete has been poured and set, the sleeve assemblies (14) and the baseplates (12) are removed by unscrewing the sleeve assemblies (14), removing an upper sleeve (40) and pulling a lower sleeve (38) and baseplate (12) up from the wood deck (18).</p> |
