This program is more effective for analysis the two way slab. Slabs are elements forming floor and roofs in building which normally. The design shear force v d is below the maximum punching strength v rd,max. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. The pca computer program pcaslab can be used to expedite the design of different slab systems. In this video deisgn of two way slabs has been covered using is 456. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Flat slab analysis, design and detailing pdf civil engineering. The basic design procedure of a two way slab system has five steps. However, plastic method can be the best method for designing such cases of twoway slabs.
According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. 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. Oneway and twoway slabs oneway slabs transfer the imposed. Aci 31811 code provides two methods for two way slab design one of which is direct design method. The dimensions of an interior bay are shown in figure 1. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan.
Assume partitions cannot be damaged by deflections. The one way slab is deflected in one way direction and primary reinforcement is placed in one direction whereas. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Design of slabtwo way excel sheet design spreadsheets the specified design strength of the concrete, is 25 mpa and the specified yield strength of the reinforcement, fy, is 400 mpa. Bending will take place in the two directions in a dishlike form. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Dec 20, 2017 in this video deisgn of two way slabs has been covered using is 456. 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. Design of reinforced concrete structures ii twoway slabs.
Generally, there are two types of slab which are one way and two way slabs. Design of slab two way excel sheet design spreadsheets the specified design strength of the concrete, is 25 mpa and the specified yield strength of the reinforcement, fy, is 400 mpa. In two way slabs shorter direction strip carry greater %age of load. Design of two way slabs is 456 limit state method youtube. Twoway slabs structural engineering forum of india, sefi. Flat slab is defined as one sided or twosided support system with sheer load of the slab being concentrated on the supporting columns and a square slab called drop panels. Reinforced concrete design 1 design of slab examples and. In twoway slabs shorter direction strip carry greater %age of load. In two way slab, load is delivered in both the directions. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. Download two way rcc slab designing excel sheet template for. The first reinforced concrete design manual formerly titled aci design handbook was developed in. Please read the lauses mentioned in the video while solving the problem. Twoway slabs have two way bending unlike oneway slab.
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. Design of twoway slab by coefficient method the constructor. The output of the program for the slab in the example is shown in the following pages. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. Two way slabs have two way bending unlike one way slab. The rcc slab designing tool is developed by shankar toyal, student of indian institute of technology, bhubaneswar.
Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Example design of two way edgesupported solid slab. Pdf design of reinforced concrete circular slabs by twoway. This condition occur when the slabs are connected monolithically with support. Flat plate concrete floor system does not use beams between columns or. This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. This paper focuses on analysis of twoway ribbed and waffle slabs with hidden beams. The coefficient method may be the simplest, easiest and the quickest approach for the design of twoway slab supported by edge beam on all slab sides. This paper focuses on analysis of two way ribbed and waffle slabs with hidden beams. A one way single span reinforced concrete slab has a clear. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. Beams of width and depth are provided on all column lines. The basic design procedure of a twoway slab system has five steps.
Distribute moments transverse at critical sections to column and middlestrip and if. A six storey building for a commercial complex has plan dimensions as shown in figure 1. One way and two way slabs one way slabs transfer the imposed loads in one direction only. Design of reinforced concrete structures ii two way slabs 1 1. There are many methods that are used to analyze twoway slabs and the precision of these methods vary depending. This method requires various formulas for different conditions of rc slab. Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. There are several methods by which two way slabs can be designed. Direct design method, that could have been named the direct analysis method because it determines or prescribes moments for different parts of the slab panel without the need to conduct structural analysis, is explained in the following sections. All methods are viable provided that the safety and serviceability of the elements are within the acceptable limits. Analysis and design of one way and two way slab in staad.
Two way slab design spreadsheet the engineering community. Two way slab design by direct design method as per aci 31811. 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. Design of reinforced concrete structures ii twoway slabs 1 1. One way and twoway slabs one way slabs transfer the imposed loads in one direction only. Analysis and design of slabs two way civil engineers pk. 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. Design of slab examples and tutorials by sharifah maszura syed mohsin. Flat slab analysis, design and detailing pdf civil. No certain method can be found in the design codes or references for designing twoway slabs subjected to concentrated loads. Use the aci 318 direct design method to design an interior bay of a flat plate slab system of multi bay building.
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. 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. Useful illustration example is presented in this study according to the available materials in iraq to facilitate the job of designers. This is a part of his project economic design of two way rcc slabs under prof s. Design of a two way rcc slab structural engineering. Pdf analysis of two way ribbed and waffle slabs with. Manual for the design of reinforced concrete building. Oct 10, 2017 tutorial for analysis and design of slab in staad pro rc designer. Therefore, primary reinforcement is presented in both directions for resisting the loads. I have developed a microssoft excel software for design of a two way rcc slab.
Design of one way slab using excel sheet i have an excel sheet for designing of two way slab but that sheet is password protected. Pdf slabs are the flooring systems of most structures including office. Distinction of twosystems from one way systems is given by aci 31814. Twoway slab example 1 beam structure classical mechanics. Construction of such tall buildings are possible only by going to a set of rigidly interconnected beams and column. Oneway and twoway slabs university of asia pacific. The following example illustrates the example building. The building is located in seismic zone iii on a site with medium soil. Time saving design aid page 9 of 14 two way slabs pcaslab v2. Chapter 3 design of rectangular beams and oneway slabs.
Standard bridge drawings autocad file types open best by rightclicking on the link and doing a save target as and saving to your computer or network before opening. Rectangular beams and oneway slabs page 2 of 9 two methods. It is recommended to create the design of slab with the use of excel sheet as the process will be very simple and lots of time will be saved. Design of slabtwo way excel sheet online civilforum. Calcs\cms\cms croft\25 old church street subterranean construction method statement. Download two way rcc slab designing excel sheet template for free. Here is two way rcc slab designing excel sheet template for download. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. There are several methods by which twoway slabs can be designed. Posttensioned concrete design spreadsheet program a pdh. He developed a project economic design of two way rcc slabs and this slab designing excel is a part of his project. 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.
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. The other ways of analysis of twoway slabs are the direct design method. Twoway concrete slab with beams spanning between supports. Design of two way ribbed slab 18 x 25 m clear span 1. Twoway restrained slab if the slabs consist more than one panel or corner of the slab are prevent against lifting it is define as twoway restrained slab. The slab has to carry a distributed permanent action of 1. The reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. Two way slab design based on aci 31811 using finite element method. Pdf design of reinforced concrete slabs ninos dinkha. Slabs are usually used in floor and roof construction.
Two way rcc slab designing excel sheet civil engineering. The program covers wide range of two way slab systems and can be used for more complex slab layouts. Twoway slab analysis and design using equivalent frame method efm. Chapter 3 design of rectangular beams and oneway slabs 12. The design of steel deck reinforced slab systems is based on the loadcarrying capacity according to the governing failure mode. Accordingly, main reinforcement is required in the two directions. The following example illustrates the design methods presented in the pca book simplified design. Missouri university of science and technology scholars mine. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. Twoway slab design based on aci 31811 using finite element method. They may be supported on two opposite sides only fig. Instructional materials complementing fema 451, design examples foundation design 147 reinforced concrete footings. There are many methods that are used to analyze two way slabs and the precision of these methods vary depending.
Ddm can be found in the twoway plate concrete floor system design example. Design of a two way rcc slab structural engineering forum. Reinforced concrete design 1 design of slab examples. One way spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. The oneway slab is deflected in one way direction and primary reinforcement is placed in one direction whereas. Cad drawing plan view of a reinforced concrete floor slab example. For designing two way slab refer is code 4562000 and sp16. Bending will take place in the two directions in a dishlike fo. The drop panels play a significant role here as they augment the overall capacity and sturdiness of the flooring system beneath the vertical loads thereby boosting. The program covers wide range of twoway slab systems and can be used for more complex slab layouts. Design of reinforced concrete components of a house. Multistory buildings are very commonly seen in cities. Jul 22, 2015 design of two way ribbed slab 18 x 25 m clear span 1. The coefficient method may be the simplest, easiest and the quickest approach for the design of two way slab supported by edge beam on all slab sides.
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