Rib spacing of 600 to 1500 mm can be used.
Waffle floor construction.
The construction principle is to adjust the levelness and dimensions of the.
Other articles where waffle slab is discussed.
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.
Manufactured from filcor with an external polypropylene skin each waffle mould is made to suit the individual requirements of the project and can.
Waffle slabs are the preferred method of construction for many project builders and prestige home builders alike.
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.
They provide low floor deflections.
This is due to the simplicity of the construction and the potential to save money in concrete volume.
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Of pan joists called the waffle slab uses prefabricated hollow sheet metal domes to create a grid pattern of voids in a solid floor slab saving material without reducing the slab s strength.
Ribbed and waffle slabs provide a lighter and stiffer slab than an equivalent flat slab reducing the extent of foundations.
They provide a very good form of construction where slab vibration is an issue such as laboratories and hospitals.
The construction process involves a building system of concrete slabs that are shored up by columns.
Waffle slabs provide stiffer and lighter slabs than an equivalent flat slab.
Purpose of waffle slab.
Waffle moulds are a reusable formwork system for constructing two way spanning ribbed concrete floors which can achieve greater spans and use less concrete when compared to traditional flat slabs.
The monolithic poured concrete will form a flat top surface while the rectangular grids form deep concrete beams on the underside with the beams resembling waffle.
Slab depths typically vary from 75 to 125 mm and rib widths from 125 to 200 mm.
The speed of construction for such slab is faster compared to conventional slab.
It uses 30 less concrete and 20 less steel than a raft slab.
The overall depth of the floor typically varies from 300 to 600 mm with overall spans of up to 15 m if reinforced longer if post tensioned.
The prefabricated waffle slab usually costs higher than the other two options.
The name waffle comes from the grid pattern created by the reinforcing ribs.
Relatively lightweight hence economical.
