Comparative Study of Waffle Slabs with Flat Slabs and Conventional RCC Slabs

Abstract

Waffle slab construction consists of concrete joists at right angles to each other with solid heads at the column which is needed for shear requirements or with solid wide beam sections on the column centerlines for uniform depth construction. Waffle slab construction allows considerable reduction in the dead load of the overall structure as compared to flat slabs and conventional RCC slabs. The thickness of waffle slabs can be minimized to great extent as compared to flat slabs and RCC slabs. The bottom portion of waffle slab has many square projections with ribs spanning in both directions. The ribs are reinforced with steel to resist flexural tensile stresses. The design of waffle slab is done in such manner so as to achieve better load distribution. This paper deals with the comparative study of Waffle slabs with flat slabs and conventional RCC slabs and highlights the advantage waffle slabs have over flat slabs and RCC slabs. This comparison is shown with the help of a case study by designing of waffle slabs along with flat slabs and RCC slabs with the help of IS 456-2000 and shown with comparison of various points.