ribbed slabs are suitable for medium to heavy loads, can span reasonable distances, are very stiff and particularly suitable where the soffit is exposed. waffle slab construction slab depths typically vary from 75 to 125 mm and rib widths from 125 to 200 mm. rib spacing of 600 to 1500 mm can be used.
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. ribbed slabs are made up of wide band beams running between columns with narrow ribs spanning the orthogonal direction.
the main limitation of flat slab is the problem posed by resisting two-way shear punching shear around the columns. hence, for heavy loads or long spans, when flat plates are constructed with drop panels around the columns or with column heads or both which provide additional resistance to shear , are called flat slabs.
answer wiki. the rib-slab is special in that it provides a lighter and stiffer slab than an equivalent flat slab, reducing the extent of foundations since the ultimate load is reduced. they provide a very good form where slab vibration is an issue. they are also known as waffle slabs, because they look like waffles with rows
slab is a horizontal flexural member like the member which is able to take load in compression as well as in tension. some types of slabs are: one way slab two way slab ribbed slab beam column slab
ribbed or waffle slab is a slab system which consists of series of parallel reinforced concrete t beams framing into reinforced concrete girders. the slab is the flange of the beam and the extended part is the web. the extended part is known as ribs. the spacing between the ribs should be in general 20-30 inch.
the basic difference between one way and two way slab is load distribution which is depends on support condition and span lengths.mainly shorter span is carring larger load than longer span.this
long slab spans can be constructed through ribbed and waffle slabs. in many cases, long spans are desirable in the building. ribbed or waffle slabs are an easy solution for this purpose. provide architectural advantages. all the electrical appliances can be installed easily in the gap of the ribs which can be architecturally aesthetic.
2 there are three essential types of slabs; solid slab, flat slab and ribbed or composite slab but the loads and span will determine the choice of slab type largely. the solid slab has two categories, one-way slab, and two-way slab. the one- way slab is one of the simplest forms of a solid slab.
compare solid slab and flat slab? flat plates are solide concret slabs of uniform thickness that transfert load directly to the column without presence of projected beams and solid slabs