![RIBBED SLAB DESIGN to BS 8110:2005 using table 3.12 coefficients 1 RIBBED SLAB DESIGN to BS 8110.2005 using table 3.12 coefficients](https://excel.civilmdc.com/wp-content/uploads/2021/11/RIBBED-SLAB-DESIGN-to-BS-8110.2005-using-table-3.12-coefficients.png)
A Ribbed Slab gives considerable extra strength in one direction while a waffle slab gives added strength in both directions. And this is possible only in monolithically cast concrete which is the two-way grid of beams. In comparison to the solid slab, the span limits of ribbed slabs are considerably longer.