PLANAR GRID-PATTERNED HOLLOW CONCRETE SLAB AND RETAINING FIXTURE

PROBLEM TO BE SOLVED: To provide a planarly grid-patterned hollow concrete slab which is excellent in workability and exhibits high sound insulating properties, and to provide a retaining fixture for use for the slab. SOLUTION: The planarly grid-patterned hollow concrete slab is formed by embedding lightweight bodies in small spaces 4 which are defined like a grid by top reinforcements 3a, 3b and bottom reinforcements 2a, 2b arranged in the slab like the grid. According to the hollow concrete slab, the lightweight body is a solid or a hollow lightweight sphere 5 having a diameter that can pass through a top face of the small space 4 but cannot pass through a side surface of the same, and fixed to a predetermined location by the retaining fixture arranged from above the top reinforcements. The retaining fixture is formed of at least two auxiliary reinforcements arranged in parallel with each other between the mutually adjacent top reinforcements, and a plurality of units fixed to the auxiliary reinforcements in a manner facing downward. The unit is installed in each small space defined by the lengthwise and breadthwise arranged top reinforcements, to thereby fix the lightweight sphere to the predetermined location in the small space. COPYRIGHT: (C)2004,JPO