One way slab design as per is 456 pdf

One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. The following example illustrates the example building. The program covers wide range of two way slab systems and can be used for more complex slab layouts. These materials are originally located at different websites. Slab is checked for deflection shear and development length. Oneway and twoway slabs oneway slabs transfer the imposed. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one way and two way slabs as per is 456. A civil engineer must know all the aspects regarding the flat floor system. Deep ribs, the concrete and steel quantities are relative low expensive formwork expected. Can be used for larger spans with relatively higher cost and higher deflections one way joist system suitable span 6 to 9m with ll 46knm2. Deep ribs, the concrete and steel quantities are relative low.

The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. Also the slab is supported four sides but the length breadth lylxration is greater than or equal to two, the slab is designed as one way slab. Design of cantilever slab spreadsheet engineering books. In this video the basic theory of one way continuous slab as per is. Design of two way slab by is 456 building materials civil. Aug 06, 2018 details name design of slab as per is. Design the building for seismic loads as per is 1893 part 1. 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. Download code design of one way slabs as per is 456 worked step by. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one way and two way slabs as per is. Time saving design aids two way slabs page 6 of 14 the pca computer program pcaslab can be used to expedite the design of different slab systems. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab.

In general, rectangular one way and two way slabs are very common and are discussed in detail. Introduction slabs are plane structural members which are used as floor and roof of buildings. Design of one way slab, design of two way slab, design of column, design of beam, design of footings, design of staircase complete pack. Total design load per unit area is w and lengths of shorter and longer spans. The design of two way rectangular slabs supported on all four sides without provision for torsion at corners is carried out as per table 27, indian standard is 456 app.

Here are the steps for the design procedure for one way slab in steps. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is. Design procedure steps for one way slab slab design steps. One way slab and two way slab design procedure example. Rcc design and detailing could be performed for ten different boundary conditions specified in is456.

Comparison of one way and two way slab behavior economic choices one way slab on beams suitable span 3 to 6m with ll 35knm2. One way slab being supported on two opposite sides only leads to the structural action in single direction. Design steps of one way slab rcc free download as pdf file. Twoway concrete slab with beams spanning between supports.

Pdf chapter 2 structural design of rcc building components. Reinforced concrete design 1 design of slab examples and. In this video deisgn of two way slabs has been covered using is 456. Also, if the slab is supported on all four edges and the ratio of longer spanl y to shorter span lx i. A reinforced concrete slab is a broad, flat plate, usually horizontal, with top and bottom surfaces parallel or nearly so.

Shear due to loads always must be less than the shear strength of concrete. Other than that, the concrete mix grade also an important factor to the thickness of slab. Please read the lauses mentioned in the video while solving the problem. A slab is supported only one direction that is one way slab now tha loads are transferred only this two supports.

Many of the stipulations of is 456 are the same as those of one way slabs. Application of limit state method to rectangular beams for flexure, shear, bond and torsion. Reinforced concrete design 1 design of slab examples. One way slab is found to be economical for spans up to 3. Method of rcc slab design as per is 456 reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one way and two way slabs as per is 456.

Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. Twoway joist concrete slab floor waffle slab system. Determine whether the slab is one way or two way slab by calculating aspect ratio. One way slabs a one way solid slab with beams and girders for each panel the aspect ratio is greater or equal to two. May 02, 2018 details language english duration 25 mins format. Slabs may be classified into 2 types depending on ratio of larger side to shorter side, its recommended in is 456 to design slabs having lylx ratio greater than 2 as one way slab and slabs having lylx less than 2 as two way slab. Quick guide to design of one way slab with is code 456. One way slab is a if supported on two opposite sides, it is always one way slab b if the lab is supported over two sides and. Simply supported two way slab design as per is 456.

The building is located in seismic zone iii on a site with medium soil. Design of one way slabs as per is 456 worked step by step. Now let us have a numerical on it to get a full concept on the procedure to design of one way slab. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Two way slab can be adopted for shorter spans above 3. They are projections from wall face of lintel beams or floor slabs. Example seismic analysis and design of a six storey building problem statement. The output of the program for the slab in the example is shown in the following pages. Flat slab system is an important division of concrete floor system. Feb 04, 2018 perpendicular to two supporting edges.

Design of one way and two way slabs, design of staircases. Design tables 2 way slabs as per is 456 with deflection check. Mar 26, 2012 design of one way slab, two way slab, column, beam, footings, stair case as per is456 short description. Design of one way slabs as per is 456 worked step by. Reinforced concrete slab design guidelinesa effective span of slab. Moduleiii design of short and long columns with axial and eccentric loading, design of isolated column. In other words, the one way slab is supported by beams in such a way that the load is carried along one direction. But, the thickness is mostly depend upon the design load and the span. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. The two classifications are oneway slab and two way slab. Design of two way slab by is 456 building materials. Minimum thickness of a slab is completely dependent upon the types of slab, may be one way or two way slab, span of slab, design load upon the slab.

Q design a floor slab for an interior room, with clear dimensions of 3. Minimum thickness of rcc slab as per is 456 civil sir. The trial depth is selected based on spandepth ratio of 7, as in is. Here ratio of longer span of slab to the shorter span of slab is greater than 2. Design of two way slab by is 456 free download as excel spreadsheet. One way slab design procedure with example design of one. Jan 26, 2019 one way slab reinforcement detail the diameter of the reinforcements and the spacing of bars is to be used according to the cls. Check the adequacy of slab thickness for beam action one way shear aci 31814 22. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Feb 14, 2017 design tables 2 way slabs as per is 456 with deflection check 1.

Option to save the design projects in local storage. Many of the stipulations of is 456 are the same as those of oneway slabs. Pdf cantilever slab design ramjan shehzaad academia. Limit state of collapse and limit state of serviceability. Other than that, the concrete mix grade also an important factor to the thickness. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Analysis and design of 1m slab strip is then performed in the main direction and the design results are. Load transfer in a one way slab, b two way slab nilson fig. Reinforced concrete slab design and detailing guide is456.

The critical section for one way shear is located at a distance d, from the face of support see figure 3. In this research, optimum design of reinforced cement concrete rcc ribbed slab, also known as waffle slab according to the indian rcc code is 456. One way slab can be defined as the type of slab in which the ratio of the longer span to the shorter span is greater than two. Empiricaldesignmethodforwall subjected to inplane vertical. In this article, i am going to explain to you the design of one way slab step by span. Following are the rcc slab design and detailing guidelines. Contents introduction important terms general considerations of design for slabs examples 3. Corners not held down conditions is given as per is. If ratio of longer span to shorter span is less than 2, then it is two way slab, otherwise one way slab. Introduction in reinforced concrete construction, slabs are used to provide flat, useful surfaces. The quantity of reinforcement along the large span of the slabs shall be as per cl. Determine the minimum thickness of slab from serviceability criteria of deflection control. Check for deflection is as per the provsions in cl. The slab has to carry a distributed permanent action of 1.

In case of slabs thin members, no need of even minimum shear reinforcement. Pdf optimum design of a reinforced concrete ribbed slab. Analysis and design of two way slabs page 1 chapter 3. For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3.