Waffle Floor Details

The load carrying capacity of waffle slab is greater than the other types of slabs.

Waffle floor details.

Detail at slab edge. A waffle slab or two way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. A flat plate system will be. Ribbed floors consisting of equally spaced ribs are usually supported directly by columns they are either one way spanning systems known as ribbed slab or a two way ribbed system known as a waffle slab.

Hence it is constructed for airports hospitals temples churches etc. Concrete floor systems are reinforced slab structures designed to satisfy a range of loading and span conditions in a building. For further details refer to the isothermic maps of australia prepared by david baggs baggs 1991. Concrete floor systems are designed to span in either one direction one way or both directions two way of a structural bay.

Ribbed waffle slab system. Slab insulation can be done with large sheets of high density foam laid all the way under the internal floor panels with only the edge and internal beams penetrating to foundation level. Waffle slabs are used for larger span slabs or floors and used when there is limited requirement for number of columns. Two way joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf and unfactored live load of 100 psf.

They provide good structural stability along with aesthetic appearance. The lateral loads are independently resisted by shear walls. Waffle slabs are preferred for spans greater than 40 feet 12 m as they are much stronger than flat slabs flat slabs with drop panels two way slabs one way slabs and. The effectiveness of earth coupling is determined by climate.

This form of construction is not very common because of the formwork costs and the low fire rating.