What Is Ribbed Floor Slab

Ribbed or waffle slab is a slab system which consists of series of parallel reinforced concrete t beams framing into reinforced concrete girders.

What is ribbed floor slab.

The extended part is known as ribs. The extended part is known as ribs. Ribbed slabs are slabs cast integrally with a series of closely spaced joist which in turn are supported by a set of beams. The slab is the flange of the beam and the extended part is the web.

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. Sandwich slabs may have the disadvantage of a larger weight compared to the ribbed ones but on the other hand they have the advantage that their spans and supports behave in the same proper way. The spacing between the ribs should be in general 20 30 inch. Ribbed and waffle slabs.

The name waffle comes from the grid pattern created by the reinforcing ribs. This reduction in the volume of concrete in the tension zone below the neutral axis is based on the assumption that the tensile strength of concrete is zero hence all the. The cores can function as service ducts and significantly reduce the self weight of the slabs maximizing structural efficiency. The spacing between the ribs should be in general 20 30 inch.

They provide a very good form of construction where slab vibration is an issue such as laboratories and hospitals. Ribbed waffle slab system. These types of slabs are used in constructing floors of multi storeyed building. Hollow core ribbed slab or hollow core slab hollowcore ribbed slabs derive their name from the voids or cores which run through the units.

The slab is the flange of the beam and the extended part is the web. Which slab is better ribbed slab or solid slab one way or ribbed slabs. One way joist slab ribbed slab it consists of a floor slab usually 50 to 100mm thick supported by reinforced concrete ribs or joists. The ribs are supported on girders that rest on columns.

Ribbed slab is a type of reinforced concrete slabs in which some of the volume of concrete in the tension zone is removed and replaced with hollow blocks or left as voids. The main advantage of ribbed floors is the reduction in weight achieved by removing part of concrete below the neutral axis. 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. 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.

Ribbed slabs are made up of wide band beams running between columns with narrow. This form of construction is not very common because of the formwork costs and the low fire rating. Ribbed and waffle slabs provide a lighter and stiffer slab than an equivalent flat slab reducing the extent of foundations.