Bridge approach slab analysis and design incorporating elastic soil support presented by. This example goes through the design of a simplysupported oneway slab on beams. Flat plate concrete floor system does not use beams between columns or. Ce 433, summer 20 slab design example 1 5 design a one. The output of the program for the slab in the example is shown in the following pages. Rectangular and circular columns, and also columns with any general shape. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3.
Plan view of floor system assume partitions will not be damaged by deflections. One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction. Rectangular beams and oneway slabs page 2 of 9 two methods. The bearing of the slab on the supporting walls may be taken as. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. The prokon suite includes a series of modules for designing concrete elements. Flat slab seminar report, ppt, pdf for civil engineering.
Design examples look at example 7 design of a flat plate floor without spandrel beams direct design method look at example 9 design of a twoway slab with beams in both directions. Determine moments at critical sections in each direction, normally the negative. This entry was posted in excel sheets and tagged excel sheets, one way slab design excel sheet, one way slab design spreadsheet, slab design excel sheet, spreadsheets by civilengineerspk. Oneway and two way slabs one way slabs transfer the imposed loads in one direction only. Chapter 3 design of rectangular beams and oneway slabs. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Before the start of two way slab design, slab depth should be determined in addition to specify column strips and middle strips. The following example illustrates the example building. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Ce 433, fall 2006 slab design example 1 6 design a oneway slab for an exterior bay of a multistory office building using the information specified below. To enforce oneway action, assign small m11 or m22 stiffness modifiers to the slab.
Analysis and design of slabs, one way slabs, online free slab design, design of slabs one way, free slab design online, design procedure for one way slab. One way and two way slabs as floor systems are the most conventional forms of structural floor systems. In sap program, the model has been divided to frame elements to represent ribs and beams and shell elements to represent the slab and solid part. More detailed advice on determining design li fe,actions, material properties, methods of analysi s. Difference between one way slab and two way slab simple. 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. Although the major reinforcement in one way slab span is in the short direction, yet at the corner, the moment is actual supported by beams at both directions. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. The two classifications are one way slab and two way slab. Oneway slab supported on beams the objective of this tutorial is to demonstrate the stepbystep procedure of adapt pt to analyze and design a posttensioned continuous slab supported on parallel beams or walls. Oneway and twoway slabs university of asia pacific. Engineering force ltd project 54 russell road, london job ref. Slab design reading assignment chapter 9 of text and, chapter of aci31802. For those who do not know what are the des ign requirements of a slab.
The superimposed load on the slab is to be 3500 n per square metre. Reinforced concrete design 1 design of slab examples and. A single slab with oneway reinforcement rebars will be analyzed with rcsolver. Steelreinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving see below. Learn to design reinforced concrete one way slabs through. Design of reinforced concrete structure one way slab presented by md. Shear strength of twoway slabs shear failure occurs when inclined. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0. In case of one ways slabs, the aci approximate analysis is applicable to one way slab system where a one way slab is continuous with a one way slab. The ratio of longer span l to shorter span b is equal or greater than 2, considered as one way slab because this slab will bend in one direction i. Introcduction slab in which the deflected surface is predominantly cylindrical termed as oneway slabs spanning in the direction of curvature. Beam and slab arrangement can be the best example for one way and two way slabs. This course covers the analysis and design of reinforced concrete one way slabs using aci code 31811. One way slab design excel sheet, all civil engineering spreadsheets available on.
The program covers wide range of twoway slab systems and can be used for more complex slab layouts. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. Before going to this topic, please read it there are two types of slab classification based on the direction of bending occurs in these slabs. The slab is to be finished with 25 mm thick cement concrete flooring. Design procedure steps for one way slab slab design steps. Ce 433, fall 2006 slab design example 1 6 design a one way slab for an exterior bay of a multistory office building using the information specified below. Beams and one way slabs how to design concrete structures using eurocode 2 design procedure a procedure for carrying out the det ailed desi gn of slabs assumes that the slab thickness has previously been determined during conceptual design. Effective span of slab shall be lesser of the two 1. The slab has to carry a distributed permanent action of 1. If you continue browsing the site, you agree to the use of cookies on this website.
Reinforced thin plate elements are supported over beams, masonry walls or directly over columns. Rectangular beams and one way slabs page 2 of 9 two methods. In site how we can identify one way slab and two way slab. A oneway reinforced concrete slab analyzed with rcsolver according to eurocode 2 specifications. Continuous oneway solid slab last updated on sun, 24 feb 2019 concrete structures this calculation is intended to show in detail the provisions of designing a slab to eurocode 2 using essentially the same slab as used in example 3. Also explore the seminar topics paper on flat slab with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Design of reinforced concrete structures ii twoway slabs 1 1. They may be supported on two opposite sides only fig. Explore flat slab with free download of seminar report and ppt in pdf and doc format. The basic design procedure of a twoway slab system has five steps.
Usd to design the twoway slab shown below, carrying floor finish 30 psf, random wall 50 psf and live load 60 psf given. Continuous oneway solid slab concrete structures eurocode. One way slab here i solve a probleam based on the one way slab, the diamentions are provided in the probleam 1st determine the aspect ration and with respect to the aspect ratio the type of slab. Design of beam and slab sections for flexure, shear and torsion. Design of reinforced concrete structures ii twoway slabs. In this article, it is assumed that slab thickness is determine but calculation of column and middle strips is. Here are the steps for the design procedure for one way slab in steps. The pca computer program pcaslab can be used to expedite the design of different slab systems. Welcome to the learn to design reinforced concrete one way slabs through examples course by engineering examples. These modifiers, available through assign area stiffness modifiers, should be applied relative to the local axes and the desired direction of oneway action. This example goes through how to determine the flexural strength of oneway slabs. The direction in which the load is carried in one way slab is called the span. Design the concrete slab and calculate the required tensile reinforcement for.
In site how we can identify one way slab and two way slab answer jayam. Pdf design calculation design of one way slab slab s1. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Twoway concrete floor slab with beams design and detailing design the slab system shown in figure 1 for an intermediate floor where the story height 12 ft, column crosssectional dimensions 18 in. Slab is a common term used to describe the structural elements such as floors and roofs where the thickness of the element is very small compared to the length and. Design of a two way rcc slab structural engineering. This again depends on the longer and the shorter span. Beams of width and depth are provided on all column lines. For example, when parallel walls connect to either side of a continuous slab, oneway action results. There are some basic steps which we generally do while designing theoretically some steps are rcc slab design guidelines. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft.
D mm d 105 mm loads on slab self weight of slab 3. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. One way slab design criteria with design example according to aci code slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. One way slab design procedure with example design of one. A typical sixspan, oneway slab supported on beams,as occurs in parking structures is selected. In many domestic and industrial buildings, a thick concrete slab supported on. The results of this analysis are compared with the results of the finite element method by sap program. Bending will take place in the two directions in a dishlike form.
Two way slab design by direct design method as per aci 31811. Mathematical structural analysis of one way ribbed slabs was introduced in this paper. Slabs are usually used in floor and roof construction. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. I have developed a microssoft excel software for design of a two way rcc slab. Allowable stress design or working stress design wsd 2. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. 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. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 20 psf, and unfactored live load 40 psf. What if all the rods, say for example 12 mm dia bar both sides each way is given. Analysis and design of slabs one way civil engineers pk. Assume partitions cannot be damaged by deflections. One way slab design excel sheet civil engineers pk.
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