Voided slab construction Methodology

Rohith Rao

Junior Member
A voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab.
This also allows increased weight and/or span, since the self-weight of the slab contributes less to the overall load. Compared to traditional solid slabs, the reduced self-weight of Voided slabs allows for longer spans and/or reduced deck thickness. The overall mass of concrete can be reduced by 35-50% depending on the design, as a consequence of reduced slab mass, as well as lower requirements for vertical structure and foundations.
1280px-Voided_biaxial_slab_diagram.svg.png
 

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A voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab.
This also allows increased weight and/or span, since the self-weight of the slab contributes less to the overall load. Compared to traditional solid slabs, the reduced self-weight of Voided slabs allows for longer spans and/or reduced deck thickness. The overall mass of concrete can be reduced by 35-50% depending on the design, as a consequence of reduced slab mass, as well as lower requirements for vertical structure and foundations.
View attachment 3376
hi,
Is there cost save in this type of slab comparing the regular slab & is there any disadvantage of this slab