The codes governing the design of the one way slab will be aci 31802 and ibc 2003. Rooms two way slabs are continuous with verandah one way slab. Designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. One way slab design excel sheet civil engineers pk. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. One way slab design criteria with design example according to aci code. Fundamentals of posttensioned concrete design for buildings part one. Bridge approach slab analysis and design incorporating elastic soil support presented by.
Introduction, definitions flat slabs are two way slabs. This system consist of both one way and two way slabs. So, we have a few more lecturers, so today we shall. Contains all design checks required by the american concrete institute code and all the conditions that must be met during the design. Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. Design steps of one way slab rcc vylywmjome4m idocpub. The proposed slab system must meet the current code. Punching of flat slabs design for shear at th e column heads. Shear in oneway slabs under concentrated load close to support article pdf available in aci structural journal 1102. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab.
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. The variables that describe the geometry of a twoway panel within a floor system, however, are so extensive that it becomes impractical to compile a meaningful set of tables or relationships without extensive approximation. The analysis and design of one way slab, one way joist, interior beam, and exterior beam are shown in this example. Design of slabs today, we shall start design of slabs. In flatplate floors, slab column connections are subjected to high shear stresses produced by the transfer of axial loads and bending moments between slab and columns. Design of slab examples and tutorials by sharifah maszura syed mohsin. The execution of the design will be explained with reference to an example. 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.
Whatever may be the width of the slabs it should always be designed for a width of equal to one metre and the same design should be adopted for the rest of the slab. Reinforced concrete design 1 design of slab examples and. Design of a two way slabs for punching shear resistance. Design of cantilever slab spreadsheet engineering books. 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. Design of reinforced concrete structures ii two way slabs 1 1. Reinforced concrete design 1 design of slab examples.
Pdf reinforced concrete oneway slabs subjected to concentrated loads are. Pdf shear in oneway slabs under concentrated load close to. First designs to follow the brab report required foundations heavier even than the san antonio. The basic design procedure of a two way slab system has five steps. They may be supported on two opposite sides only fig. Accordingly, main reinforcement is required in the two directions. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Assume partitions cannot be damaged by deflections. Bending will take place in the two directions in a dishlike form. Design criteria there are three criteria which must be considered for the design of a conventional one way slab system. Chapter 3 design of rectangular beams and oneway slabs. The program covers wide range of two way slab systems and can be used for more complex slab layouts.
Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance with the design. Nov 15, 2014 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. One way simplysupported and continuous solid slab free download as powerpoint presentation. D mm d 105 mm loads on slab self weight of slab 3. Comparison of one way and two way slab behavior one way slabs carry load in one direction. The pca computer program pcaslab can be used to expedite the design of different slab systems. Design of a two way rcc slab structural engineering forum. A copy of the tables is provided in the appendix and also. How to design a two way slab free download as powerpoint presentation. Two way 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. 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. Slab design much simpler than beam design concrete slabs behave primarily as flexural members and design is similar to that of beams, although in general much simpler because. It is estimated that the 125 mm thick slab will carry 4.
Chapter 3 design of rectangular beams and oneway slabs 12. Summary of bill of quantities civil works bar bending schedule. Ce 433, fall 2006 slab design example 5 6 f s e s e s 0. They are projections from wall face of lintel beams or floor slabs. Allowable stress design or working stress design wsd 2. Oneway and twoway slabs university of asia pacific. The waffle slab is also sometimes termed as ribbed slab system but you would find it interesting to know that ribbed and waffle slab are somehow two different things. Pdf experimental study of shear in reinforced concrete one. The direction in which the load is carried in one way slab is called the span. Plan view of floor system assume partitions will not be damaged by deflections.
The hand solution is used for a detailed comparison with the analysis and design results of the engineering software program spbeam. Ce 433, summer 20 slab design example 1 5 design a one. The hand solution is used for a detailed comparison with the analysis and design results. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. If slab is supported on all four sides and r shorter side longer side one way slab. Twoway joist waffle slab design approach and methodology. Rectangular beams and oneway slabs page 3 of 9 design of rectangular beams and oneway slabs continued a.
Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. Continuous one way slab example 16 figure below shows a first floor plan of an office building. The two classifications are one way slab and two way slab. Designing of slabs depends upon whether it is a oneway or a two way slab. In one way ribbed slab, loads are transferred in one direction, and the main reinforcement is distributed in the same direction of the load. Time saving design aids two way slabs page 1 of 14 the following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. Department of mechanics, materials and structures english. Posttensioned oneway slab pennsylvania state university. A detailed explanation will be given of the checksto be carried out, the aspects to be considered in the design and the construction procedures and sequences of a posttensioned slab. 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.
Rectangular beams and one way slabs page 2 of 9 two methods. 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. Beams of width and depth are provided on all column lines. One way 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. Rc slab design ec2 worked example bending reinforcement. Department of mechanics, materials and structures english courses reinforced concrete structures code. For design of twoway slabs, see chapters, 5, 6, and 7. Breadth of slab is already fixed b mm shear stress are usually low in a slab. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0. Ribbed slab design spreadsheets to eurocode engineering. Under smartarttools, on the format tab, in the size group, do the following. Introduction within the last several years there has been a lot of interest in a design procedure for the. The design procedure for a uniformly loaded one way reinforced slab can be divided in the following steps.
A single slab with oneway reinforcement rebars will be analyzed with rcsolver. Oneway and twoway slabs oneway slabs transfer the imposed. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Pdf design calculation design of one way slab slab s1. 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. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. The tensile strength of concrete is neglected in flexural strength calculations aci sec. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. Pdf in the last two decades, the use of voided bubbled slabs in constructions has been increased because of several advantages such as.
Use i wsd, ii usd to design the twoway slab shown below, carrying floor finish 30 psf, random wall 50 psf and live load 60 psf given. History of two way slabs the feeling at start that only part of the load to be carried in each direction, so that statics somehow did not apply to slab construction. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. One way and two way slabs one way slabs transfer the imposed loads in one direction only. When one says ribbed slab it is actually a one way spanning system with ribs where as in waffle slab the joists form a two way. Fundamentals of posttensioned concrete design for buildings. One way simplysupported and continuous solid slab bending.
Reinforced concrete oneway slab design pd49gzkzp2n9 idocpub. Pdf structural behavior of reinforced concrete oneway slabs. A typical sixspan, one way slab supported on beams,as occurs in parking structures is selected. Distribute moments transverse at critical sections to column and middlestrip and if. Example design of two way edgesupported solid slab. Pdf slabs are the flooring systems of most structures including office. Pdf oneway slabs subjected to combination of loads failing in. Closed form formulas closed form formulas are readily available for beams and oneway slabs. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Design procedure steps for one way slab slab design steps.
One way slab design procedure with example design of one. Slab design reading assignment chapter 9 of text and, chapter of aci31802. The trial depth is selected based on spandepth ratio of 7, as in is. Two way joist waffle slab design approach and methodology two way joist slab often called two way ribbed slab or waffle slab is an economical floor system when the spans are long andor loads are high. Here are the steps for the design procedure for one way slab in steps. 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. Example calculations for this and all other example problems the following data from the canam united steel deck design manual and catalog of steel deck products will be used and are worked using lrfd methodology. 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. One way spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. This paper presents an experimental and computational study on ribbed slabs with widebeam, two one way slabs and two two way slabs, with variable depths were tested to evaluate their resistance. The following example illustrates the example building. One way and two way slab design aspect the slab provides a horizontal surface and is usually supported by columns,beams or walls.
One way and two way slab design aspect online civilforum. Flat plate concrete floor system does not use beams between columns or. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. In 1914 nichols used statics to compute the total moment in a slab panel. The behaviour of reinforced concrete beam sections at ultimate loads has. Here ratio of longer span of slab to the shorter span of slab is greater than 2. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3.
One way slab is the most basic and common type of slab. Slabs are usually used in floor and roof construction. Introcduction slab in which the deflected surface is predominantly cylindrical termed as one way slabs spanning in the direction of curvature. Design of reinforced concrete structures ii twoway slabs. The reinforced concrete design handbook now provides dozens of design examples of various reinforced concrete members, such as one and two way slabs, beams, columns, walls, diaphragms, footings, and retaining walls. His analysis suggested that the current slab design. I have developed a microssoft excel software for design of a two way rcc slab.
J joshi2, 3rohit raj, prem prakash mishra4, mamta kadhane5, bharati mohabey6 civil engineering, rajarshi shahu college of engineering, pune, maharashtra, india abstracta voided slab is a concept that simply removes the. For economical design of similar structures a smaller slab thickness leading to values between 60% to 80% of balanced selfweight is generally selected. Analysis and design of slabs one way civil engineers pk. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Rcc design excel sheet rcc design excel sheet provides beam design, column design, slab design. Shades in the roofing system cantilever slab of stairs. For those who do not know what are the des ign requirements of a slab. The output of the program for the slab in the example is shown in the following pages. Design of reinforced concrete structure one way slab presented by md. A system where a two way slab is continuous with a one way slab or vice versa is called a mixed slab system.
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