The following simplified design is valid when length2width of slab and for. O 10200 are shaped with bends at their ends in every two bars one is straight and one is bendup. This strip extends from one end support a to the other end support d, as shown in the fig. Basic steps of analysis and design of building structures.
Typical arrangement for testing one way slab elements figure 5. Adaptrc handles both prismatic and nonprismatic spans, as well as supports with different boundary conditions. Twoway concrete slab with beams spanning between supports. Guide to design of simply supported slabs design of rcc. One way slab has two types namely simply supported slab and one way continuous slab. One way slabs are the easiest to design as the direction is simple and are. Figure 1 geometry of a rc simply supported skew slab table 1 details of simply supported rc skew slabs tested 6 sl. Reinforced thin plate elements are supported over beams, masonry walls or directly over columns. Just as we saw in the case of a simply supported oneway slab, in the case of a continuous oneway slab also, we consider a strip of 1m width. This example goes through the design of a simply supported one way slab on beams. Unit weight of concrete 150 lbft3 a design the slab for the aci code minimum thickness. Slabs may be simply supported or continuous over one or more supports and are classified as follows. The design of a oneway slab will lead to reinforcement mainly in the bearing direction.
Reinforced concrete slab slabs are plate elements forming floors, roofs in buildings. Five different types of excel spreadsheet like simply supported beam, cantilever beam, short column and long column, one way and twoway slab has calculated in this project work. Most often, these concrete slabs are used to construct floors and ceilings in high rise buildings and skyscrapers. Dec, 2017 one way slabs are the easiest to design as the direction is simple and are usually designed as set of beam strips spanning in one direction. Rcc slab can be various types depending on various criteria. In a finite element software like scia engineer, when the slab is supported on. Maximum moment of simply supported slab is at midspan under self.
The first stage of the design is finding the bending moment of the slab panels. To see their result for this slab we will find the load factor. Design of rcc rectangular slab s as per is 4562000 1. While two way slabs also consist of two types namely simply supported two way slab and constrained slab. What is a simply supported slab and a continuous slab. Learning outcomes at the end of this lecture, the student should be able to a classify all types of solid slab co1 b identify one way and two way solid slab co1 c use a relevant clauses in code of practice co1 d design oneway slabs co2 e details the slabs co1.
Design of concrete structures 14th edition, 2009, by arthur h. Reinforced concrete design 1 design of slab examples. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Flat slabs supported in rc beam autodesk community. Design a simply supported oneway reinforced concrete floor slab to span 10 ft and carry a service live load of 175 psf and a service dead load of 25 psf. Adopt m 15 grade of concrete and mild steel reinforcement. Therefore, other design values can be reduced according to the. A continuous slab is supported on a series of supports free to bend. Reinforced concrete, 2014, 9th edition, aci 31811 code edition, by jack c. I am modelling a one way spanning precast slab which is simply supported on precast concrete walls each side. In this construction video tutorial, you will learn how to create the design of one way slab simply supported slab that is standing on the masonry wall. Chapter 3 design of rectangular beams and oneway slabs. This is an example on how to design a one way simply supported solid slab as per the eurocode 2.
This spreadsheet undertakes these calculations and returns design moments for use during detailed design. If the span is a continuous one, the user may run the software several times. These slabs are considered to be supported along two long sides. That is, the load factor at which the uls moment equals the moment capacity. They may be supported on two opposite sides only fig.
Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Analysis and design of slabs two way civil engineers pk. All slabs were of thickness 50mm and bars used were of 4mm dia. In the absence of advanced analysis software, like fem modelling, it was. For beams and oneway spanning slabs, you can manipulate longterm. On way spanning simply supported precast concrete slab rsa. Difference between simply supported and continuous slabs.
Calculate factored moment and shear force by considering the onemeter width of the slab for simply supported slab. Second collapse mechanism for simply supported slab under combined uniform and concentrated loading 19 figure 7. Oneway and twoway slabs university of asia pacific. Crosssections can include a combination of rectangular, i, t and lsections, and spans can have constant or tapered sections. The minimum required reinforcement in the support areas is provided in two alternative ways.
Find depth of slab using deflection control criteria. In one way simply supported slabs the loads are always. Slabs may be simply supported or continuous over one or more supports and are classified according to the method of support. Slabs of uniform thickness bending and reinforced in one direction. Two way 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. Fundamental support and span moments deflection curves. Concrete slabs behave primarily as flexural members and design is similar to that of beams, although in general much simpler because. One way and two way slabs one way slabs transfer the imposed loads in one direction only. Find modification factor for tension reinforcements. Design a simply supported one way slab in hindi by parag. Simply supported beams have zero secondary moments significant.
Simply supported slabs are classified as one way slabs and two way slabs. What is the ld ratio for the oneway slab for simply. As the name suggests, simply supported slabs are supported on columns or stanchions. One way slabs bend in one direction only and transfer their loads to the two support beams in opposite directions. Chapter 3 design of rectangular beams and oneway slabs 12. The safi gse concrete software supports several concrete design standards. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Simply supported oneway slab simple version concrete.
Slabs are usually used in floor and roof construction. One way simplysupported and continuous solid slab bending. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. The continous slab will be designed as a series of simply supported spans. Frame analysis also provides a convenient way for generating input for this program.
Rectangular beams and oneway slabs page 3 of 9 design of rectangular beams and oneway slabs continued a. Chapter 7 analysis of continuous oneway slabs blogger. Pdf cost optimum design of reinforced concrete simply. Design procedure steps for one way slab slab design steps. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. The slab is to be finished with 25 mm thick cement concrete flooring. In this tutorial of unite coaching, you will learn the process of analysis and design of simply supported one way slab as per indian standard. The slab has to carry a distributed permanent action of 1. You can design a single span simply supported, fixed or cantilever or many continuous spans.
One way slab design simplified online design of concrete structures. Slabs having supports on less than four sides can be designed as oneway. You can design a single span simply supported, fixed or cantilever or many. Slab types can be decided through side ratio calculation through bs8 110 reference such as. Simply supported oneway slab design to ec2 youtube. The deformation and the cracking due to flexure which at this figure are presented magnified, are similar to those met in the horizontal oneway slab, and therefore the necessary reinforcement is also similar. Slab design is comparatively easy when compared with the design of other elements. The building is splayed at an angle in certain areas as per the attached two sheets on the pdf which shows the span directions and there support.
One way slab design spreadsheets to eurocode 2 engineering. Effect of live load on the static analysis of oneway slabs. In two way slabs shorter direction strip carry greater %age of load. You will also gather information on all checks for making design of the slab. Mar 07, 2017 rcc slab design depends on the on the dimensions of the slab after which the slab is termed as a oneway slab or a twoway slab in the design of rcc structures, column design and beam design are to be done before we start with rcc slab design basic rules followed in the design of simply supported slab. Two way slab design panel select boundary condition of slab for upliftment of corners. If slab is supported on all four sides and r shorter side longer side slab. Chapter 3 design of rectangular beams and oneway slabs 12 h a 12 strip in a simply supported one way sl ab h. Beam and slab arrangement can be the best example for one way and two way slabs. Apr 24, 2018 in this construction video tutorial, you will learn how to create the design of one way slab simply supported slab that is standing on the masonry wall. Behaviour and reinforcement of one way staircase the deformation and the cracking due to flexure which at this figure are presented magnified, are similar to those met in the horizontal one way slab, and therefore the necessary reinforcement is also similar. The superimposed load on the slab is to be 3500 n per square metre. Two way slabs have two way bending unlike one way slab. Depending on the boundary condition and the properties of the slabs, methods of finding bending moment is expressed in the bs 8110 part 01 as follows.
Distance between the centers of bearings, clear span plus effective depth. Reinforced concrete slab and beam design software adaptrc. Reinforced concrete design 1 design of slab examples and. In this paper excel spreadsheet software has used in analyzing and calculating rebars of different rc elements like beams, columns and slabs. Design of simply supported slab click here link 01. Such as ribbed slab, flat slab, solid slab, continuous slab, simply supported slab.
Design and detailing of reinforced concrete beams and slabs. Analysis and design of slabs one way civil engineers pk. Jul 10, 2017 this example goes through the design of a simply supported one way slab on beams. The bim software application for structural detailing of reinforced concrete buildings. Oneway simply supported slab, span length, l 10 ft normal weight concrete unit weight 145 pcf. The slabs that are supported only at end are called simply supported slabs i. Slab resting on walls or sufficiently deep and rigid beams on all sides. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1.
This design is for a typical suspended slab that has dimensions where one way action occurs. Calculation reference reinforced concrete design bs8110 concrete slab design created on 17 september 2012 97. Spinning one way supported on two sides such as between beams or walls the way a slab spans its supports has a direct impact on the way in which the slab will bend. Simply supported slab upliftment of corners continuous slab no upliftment. If slab is supported on all four sides and r shorter side longer side one way slab. The bearing of the slab on the supporting walls may be taken as 230 mm. Design of simply supported slab one way slab design steps. Design of rcc beam simply supported slab shot spanlxmm long spanlymm wall bearingmm building type residential office workshop live loadnsq. Shear stress are usually low in a slab except when there are heavy concentrated loads, and. The effective span of a simply supported slab shall be taken as the lesser of the following. A simply supported slab just has its ends supported say on two walls or beams free to bend at the ends without any restraint unlike a fixed beam.
Design an interior simply supported oneway slab to s minimum thickness when deflections are not com depth, main reinforcement and temperature proressure october 31, 2011 oneway slab to support a live load of 50 psf. The requirements and materials of the slab are given below. There must be full shear connection, so that the design compressive force in the concrete, nc,f is. For the simplicity in design, one way slabs are designed in per meter strips. Design of simply supported slab one way spanning skip to main content. The depth of the slab in compression, for full shear. Pro model is exported to ram concept and the design of that slab is done by ram concept. The carpenters formwork drawing describes the shape of the slab s moulds. Apr 27, 2017 2 even when a rectangular slab is supported on all the four edges, the slab may be considered as a one way slab if the lengthtobreadth lb ratio of the slab is equal to or greater than two. Mar 14, 2018 two way slab design spreadsheets to eurocode 2 14 march 2018 off by the engineering community two way spanning slabs for rectangular slabs with standard edge conditions and subject to uniformly distributed loads, normally the bending moments are obtained using tabulated coefficients. A oneway slab is a slab that bears the load in one direction mainly.
Slab consists of two types which are one way slab and two way slabs. Aug 02, 2014 helpcontentsgraphical interface helpadvanced slab design mode elsewhere in this forum, you will find numerous discussions on designing slabs using ram concept. Based on the stiffness requirement assume suitable depth and calculate the effective span. The direction in which the load is carried in one way slab is called the span. Show a sketch indicating slab lent and temperature reinforcement f 5,000 psi, fy 60 ksi. Breadth of slab is already fixed b mm shear stress are usually low in a slab except when there are heavy concentrated loads, and.
First collapse mechanism for simply supported slab under combined uniform and concentrated loading 17 figure 6. Slabs having supports on less than four sides can be designed as one way. Slabs are generally designed on the assumption that they consists of a number of beams of breadth one meter. A reinforced concrete slab is one of the most important structural elements of modern buildings. One way slab being supported on two opposite sides only leads to the structural action in single direction. Oneway and twoway slabs oneway slabs transfer the imposed. Lec11 continuous beams and one way slabs1 reinforced. Slab design example 02 design of simply supported slab two way spanning span of slab 4. Please wash your hands and practise social distancing. This would usually include dimensioning and detailing curtailment, laps, ubars and also undertaking the other checks detailed in section 3. Adaptrc for fast and easy design of reinforced concrete beams, frames. The thickness ranges from 10 to 50 centimeters and are supported on columns and beams.
Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Computational analysis of rcc slab simply supported ijrte. Charif analysis and design of oneway solid slabs with beams and girders. Design of one way slabs as per is 456 worked step by step limit state design mumbai university duration.