For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Design of cantilever slab spreadsheet engineering books. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. Computational analysis of rcc slab simply supported ijrte. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Download code design of one way slabs as per is 456 worked step by. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. So, we have a few more lecturers, so today we shall start part 1. 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. Section 3 general design consideration 18 bases rlr design 18. Lb2 is one way slab lb apr 03, 2019 design of one way slab as per is. Design of rcc rectangular slabs as per is 456 2000.
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. Chapter 3 design of rectangular beams and oneway slabs 12. Sandeep k shrivastava department of civil engineering. The effective span shall be as per simply supported case, the 1 which i. 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, and ii clear span and effective depth. Pdf basic principles, theory and oneway slabs san patel. 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. Flat slab analysis, design and detailing pdf civil. This is a part of his project economic design of two way rcc slabs under prof s. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Slabs are considered as divided in each direction into middle and end strips as shown below.
All resources used for compiling the contents are gratefully acknowledged. Sloping slabs under gravity load would be subjected to bending and axial thrust. And this is your lecture number 14, design of slabs part 1. 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. Jul 26, 2014 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. A civil engineer must know all the aspects regarding the flat floor system.
Slabs are usually used in floor and roof construction. The trial depth is selected based on spandepth ratio of 7, as in is. Plain and reinforced concrete code of practice ced 2. 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. Reinforced concrete design 1 design of slab examples and. If slab is supported on all four sides and r shorter side longer side as one way slab. This data is good for know the difference between one way slab and two way slab but if u provide to how to reinforcement design in one way and two way slab so its very helpfull. One way and two way slabs one way slabs transfer the imposed loads in one direction only.
The slab has to carry a distributed permanent action of 1. Allowable stress design or working stress design wsd 2. Reinforced concrete slab design and detailing guide is456. Two way slabs are normally supported from four sides. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Reinforced concrete design 1 design of slab examples. We can take the effective span and we shall get it in clause 22. Oneway and twoway slabs oneway slabs transfer the imposed. One way slab being supported on two opposite sides only leads to the structural action in single direction. When the ratio of long span to short span is less than 2, then the slab is known as a slab spanning in two directions or twoway slab. 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. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Aug 06, 2018 details name design of slab as per is.
L center to center distance between the support b depth of slab. Find the dead load and the live load per square meter of the slab. Dhang department of civil engineering indian institute of technology kharagpur lecture 14 design of slabs today, we shall start design of slabs. Two way slab design by direct design method as per aci 31811. Design of reinforced concrete structures ii twoway slabs 1 1. Rectangular beams and one way slabs page 2 of 9 two methods. Pdf the paper presents the cost optimization of reinforced concrete simply supported oneway slabs under uniformly distributed. Assume the thickness of slab take 4 cm per metre run of the span. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1.
Slab design is done mainly by manual method or using design and analysis. Application of one way slab provides useful flat surface one way slab may be used when there is architectural limitations it is the simplest form of slab design main reinforcement placing is one way, so there is a little congestion than two way slab 29. Design of a two way rcc slab structural engineering forum. Effective span of slab shall be lesser of the two 1. Pdf cost optimum design of reinforced concrete simply. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is. Two way slab design by direct design method as per aci 31811, step by step procedure and limitations of direct design method for two way slab is presented. Please read the lauses mentioned in the video while solving the problem. 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. In design classes, we most of the time we refer that code because, wherever you have any dispute. Design of one way and two way slabs, design of staircases.
Design example of one way slab with detailing scribd. The ratio lb which is less than 2 is known as two way slab. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Indian standard design procedure has been followed, and the clauses in the is4562000, has been followed during the coding. Analysis and design of slabs one way civil engineers pk. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member.
I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. In this video deisgn of two way slabs has been covered using is 456. Bending will take place in the two directions in a dishlike fo. I have developed a microssoft excel software for design of a two way rcc slab. An example of how to design one way slab with detailing. Moreover, is 456 further stipulates the use of coefficients of moments and. Find the effective span which is lesser of i distance between centres of bearings. They may be supported on two opposite sides only fig. Bending will take place in the two directions in a dishlike form. One way slab design excel sheet civil engineers pk. The basic design procedure of a two way slab system has five steps. Feb 10, 2014 assume the thickness of slab take 4 cm per metre run of the span.
Now, let us see that what our quote says is 456 what our quote says. Section 3 general design consideration 18 bases rlr design. Based on the boundary condition, you can determine the axial thrust and the bending moment. Dec 14, 2017 design of one way slab is covered in this video. 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. They are projections from wall face of lintel beams or floor slabs. It carries a live load of 4 knm 2 and floor finish of 1. This is an example on how to design a rcc slab using is 4562000. Before we start the design of slabs, let us see what our words says related to your. These materials are originally located at different websites.
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. Manual for the design of reinforced concrete building. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. The design of interior, edge, and corner columns is explained in the twoway flat plate concrete floor slab design example. Flat slab system is an important division of concrete floor system. May 02, 2018 details language english duration 25 mins format. Design of one way slabs as per is 456 worked step by. Assuming suitable bearings not less than 10cm, find the span of the slab between the centers of bearings. Reinforced concrete slab design guidelines a effective span of slab. This spread sheets is useful for design of cantilever slab as per is 456. Determine the maximum bending moment for a one meter wide strip of the slab. Following are the rcc slab design and detailing guidelines. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3.
Here ratio of longer span of slab to the shorter span of slab is greater than 2. Distribute moments transverse at critical sections to column and middlestrip and if. This spreadsheet program provides for the design and analysis of posttensioned concrete one way beam and slab systems and two way flat plate slab systems. Application of limit state method to rectangular beams for flexure, shear, bond and torsion. One way slab design procedure with example design of one. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Design of reinforced concrete structures ii two way slabs 1 1. Design of reinforced concrete structures ii twoway slabs. Twoway slab shear strength shear strength of the slab in the vicinity of columnssupports includes an evaluation of oneway shear beam action and twoway shear punching in accordance with aci 318 chapter 22. Sep 03, 2011 reinforced concrete effective span centretocentre distance between supports longer dimension of a rectangular panel of slab for yield line calculations modular ratio esec design bending moment per unit width of slab modified to account for axial load moment per unit width about xaxis moment per unit width about yaxis. Twoway concrete slab with beams spanning between supports. Difference between one way slab and two way slab simple.
Plan view of floor system assume partitions will not be damaged by deflections. For this case, if you take the simply supported case what is the value of l that effective span, that we have to find out. Two way rcc slab designing excel sheet civil engineering. Design a simply supported one way slab over a clear span of 3. Calculate aspect ratio aspect ratio 2 longer spanshorter span 2. General a slab is a flat two dimensional planar structural element having thickness small compared to its. A civil engineer should study these lectures and materials for structural engineering acumen.
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