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This is a typical CAD dwg drawing for a Bubble Voids Slab Cross Section Detail. Fully detailed slab reinforcement with bubble voids. Similar concept to waffle slap reinforcement but using plastic sphere shaped bubbles to reduce slab dead weight.

Similar to a waffle slab, in order to reduce dead weight load, a slab can be reinforced accordingly using plastic bubble voids ( sphere shaped ). This dramatically reduces the dead weight of the slab where concrete does not contribute to the strength of the slab. Bubble voids remain in the slab after pouring. This is a typical bubble voids reinforced concrete slab cross section detail for a 250mm slab depth example

Void former bubbles and cage modules, top and bottom slab reinforcement, supporting RC beam, clear distances.