Design of two way slab as per is 456 pdf

These materials are originally located at different websites. Load transfer in a oneway slab, b twoway slab nilson fig. Calculate aspect ratio aspect ratio 2 longer spanshorter span 2. This is a part of his project economic design of two way rcc slabs under prof s. However main reinforcement bar and distribution bar in transverse direction. Solving the equation, per m3 of concrete the quantitiy of. Design of one way slabs as per is 456 worked step by. Please enter the support width along the shorter span of slab panel. Chapter 3 design of rectangular beams and oneway slabs. Before we start the design of slabs, let us see what our words says related to your. All methods are viable provided that the safety and serviceability of the elements are within the acceptable limits.

Rectangular beams and oneway slabs page 2 of 9 two methods. Design a simply supported one way slab over a clear span of 3. Design mix and nominal mix concrete in design mix, the proportions of cement, aggregates sand and gravel, water and. Two way rcc slab designing excel sheet civil engineering. A civil engineer must know all the aspects regarding the flat floor system. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Design of one way and two way slabs, design of staircases. Moduleiii design of short and long columns with axial and eccentric loading, design of isolated column footing. One way slab being supported on two opposite sides only leads to the structural action in single direction. Calculation of approximate depth from deflection criteria cl 23. Pdf predicting the response of reinforced concrete slab exposed. I have developed a microssoft excel software for design of a two way rcc slab.

Flat slab system is an important division of concrete floor system. The bottom of the slab is reinforced with steel mesh to resist the two. 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. Bending will take place in the two directions in a dishlike form.

Assume the thickness of slab take 4 cm per metre run of the span. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is. Figure 11 different endrestraint conditions for twoway slab as per is456, 2000 12. In the layout you have to fix the column positions, the orientations of columns. Design of reinforced concrete structures ii twoway slabs. Check for deflection is as per the provsions in cl. This is an example on how to design a rcc slab using is 4562000. In this video deisgn of two way slabs has been covered using is 456. Please read the lauses mentioned in the video while solving the problem.

Slab designer as per is 4562000 free download as pdf file. Following are the rcc slab design and detailing guidelines. We can take the effective span and we shall get it in clause 22. Cornell university, david darwin university of kansas, charles dolan university of wyoming 3. Design of two way slab by is 456 free download as excel spreadsheet. Assuming suitable bearings not less than 10cm, find the span of the slab between the centers of bearings. Design of concrete structures 14th edition, 2009, by arthur h. The partial safety factors for loads, as per is 456. Slabs are considered as divided in each direction into middle and end strips as shown. Oneway and twoway slabs university of asia pacific.

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. One way slab design procedure with example design of one. Design of reinforced concrete structures ii twoway slabs 1 1. The effective span shall be as per simply supported case, the 1 which i. Design of two way slabs is 456 limit state method youtube. Design of two way slab by is 456 building materials civil. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. 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. Simply supported two way slab design as per is 456.

This spread sheets is useful for design of cantilever slab as per is 456. Here ratio of longer span of slab to the shorter span of slab is greater than 2. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. 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. Specifications for design of footings as per is 456. Two way slabs are classified into two types based on the support conditions. 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. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. 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. 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. The framing beams are to join columns to each other. 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 the current provisions for fire rating of reinforced concrete slab as per indian. Allowable stress design or working stress design wsd 2. Continuous beam if it is the other way, for end span with 1 end fixed and the. Design spreadsheets flat slab system is an important division of concrete floor system. 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. The basic design procedure of a twoway slab system has five steps. Slab shear strength twoway shear check the adequacy of slab thickness for punching shear twoway shear at an interior column figure 4.

A step by step procedure of slab designing this manual is created based on the value obtained from slab designer ver 2. Reinforced concrete slab design and detailing guide is456. Design of a two way rcc slab structural engineering. 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. Slab designer as per is 4562000 civil engineering mathematics. There are several methods by which twoway slabs can be designed.