Design of two way slab as per is 456 pdf

Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is 456. Pdf predicting the response of reinforced concrete slab exposed. Two way rcc slab designing excel sheet civil engineering. Check for deflection is as per the provsions in cl. Oneway and twoway slabs university of asia pacific. Slabs are considered as divided in each direction into middle and end strips as shown. Calculation of approximate depth from deflection criteria cl 23. Design of two way slab by is 456 building materials civil. Two way rcc slab designing tool in microsoft excel developed by shankar tayal a 3rd year student of school of infrastructure, indian institute of technology, bhubaneswar. For uniformly distributed loads of w per square foot of the slab, each strip acts approximately like a simple beam uniformly loaded by its share of w. Design of two way slabs is 456 limit state method youtube. There are several methods by which twoway slabs can be designed. In the layout you have to fix the column positions, the orientations of columns. Allowable stress design or working stress design wsd 2.

Slab shear strength twoway shear check the adequacy of slab thickness for punching shear twoway shear at an interior column figure 4. In this video deisgn of two way slabs has been covered using is 456. This is a part of his project economic design of two way rcc slabs under prof s. The bottom of the slab is reinforced with steel mesh to resist the two. Oneway and twoway slabs oneway slabs transfer the imposed. Continuous beam if it is the other way, for end span with 1 end fixed and the. Before we start the design of slabs, let us see what our words says related to your. Here ratio of longer span of slab to the shorter span of slab is greater than 2. A step by step procedure of slab designing this manual is created based on the value obtained from slab designer ver 2. We can take the effective span and we shall get it in clause 22. Design of one way and two way slabs, design of staircases. Pdf cost optimum design of reinforced concrete simply.

The coefficient method may be the simplest, easiest and the quickest approach for the design of twoway slab supported by edge beam on all slab sides. Twoway reinforced concrete slab design clear longer span of slab please enter the longer span. In the output, you can view the slab design results. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Distribute moments transverse at critical sections to column and middlestrip and if.

All methods are viable provided that the safety and serviceability of the elements are within the acceptable limits. Please enter the support width along the shorter span of slab panel. Design of two way slab by is 456 free download as excel spreadsheet. Solving the equation, per m3 of concrete the quantitiy of. Two way rcc slab designing tool in microsoft excel developed by shankar tayal a 3rd year student of school of infrastructure, indian institute of technology, bhubaneswar this is a part of his project economic design of two way rcc slabs under prof s. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. Find the effective span which is lesser of i distance between centres of bearings. When a slab is supported on all four sides and the ratio of long span to short span is equal or greater than two, it will be considered as one way slab. Cornell university, david darwin university of kansas, charles dolan university of wyoming 3.

Moduleiii design of short and long columns with axial and eccentric loading, design of isolated column footing. The effective span shall be as per simply supported case, the 1 which i. Design of one way slabs as per is 456 worked step by. Load transfer in a oneway slab, b twoway slab nilson fig.

Simply supported two way slab design as per is 456. To design the slab, in the modelling mode, go to design concrete specify the design parameters click on commands select design slabelement and assign it to the required plate elements. This spread sheets is useful for design of cantilever slab as per is 456. Design a simply supported one way slab over a clear span of 3. Flat slab analysis, design and detailing pdf civil. Design of concrete structures 14th edition, 2009, by arthur h.

The partial safety factors for loads, as per is 456. Please read the lauses mentioned in the video while solving the problem. A civil engineer must know all the aspects regarding the flat floor system. Assuming suitable bearings not less than 10cm, find the span of the slab between the centers of bearings. Behavior of two way slabs a rectangular slab supported on four edge supports, which bends in two orthogonal directions and deflects in the form of dish or a saucer is called two way slabs.

Pdf the current provisions for fire rating of reinforced concrete slab as per indian. Specifications for design of footings as per is 456. However main reinforcement bar and distribution bar in transverse direction. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is. Slab designer as per is 4562000 civil engineering mathematics. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab.

Bending will take place in the two directions in a dishlike form. One way slab being supported on two opposite sides only leads to the structural action in single direction. Figure 11 different endrestraint conditions for twoway slab as per is456, 2000 12. The basic design procedure of a twoway slab system has five steps. I have developed a microssoft excel software for design of a two way rcc slab. Strength design or ultimatestrength design usd strength design or ultimatestrength design usd with strength design method, the working dead load dl and live load ll are. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. Following are the rcc slab design and detailing guidelines. Design of reinforced concrete structures ii twoway slabs. The framing beams are to join columns to each other. These materials are originally located at different websites. Reinforced concrete slab design and detailing guide is456.

Chapter 3 design of rectangular beams and oneway slabs. This is an example on how to design a rcc slab using is 4562000. Rectangular beams and oneway slabs page 2 of 9 two methods. Design of twoway slabs slab thickness should be calculated based on the greater value of the negative b. Design spreadsheets flat slab system is an important division of concrete floor system. Flat slab system is an important division of concrete floor system. The load on the slab is carried by the short span in one direction.

Slab designer as per is 4562000 free download as pdf file. Assume the thickness of slab take 4 cm per metre run of the span. Design mix and nominal mix concrete in design mix, the proportions of cement, aggregates sand and gravel, water and. One way slab design procedure with example design of one. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful for practical purposes. Design of reinforced concrete structures ii twoway slabs 1 1.