Load balancing is used, a portion of the load on slab is balanced by the transverse forces imposed by the draped. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. The program covers wide range of twoway slab systems and can be used for more complex slab layouts. Bending will take place in the two directions in a dishlike form. Flat slab analysis, design and detailing pdf civil. Twoway joist concrete slab floor waffle slab system. Plzsubscribe this video deals with the basic of flat slab and the clauses of is 456 2000. Flat slab manual design bs flat slab design example part 1 how to design a flat slab, step by step explained in this video.
Reinforced concrete slab design and detailing guide is456. Explore flat slab with free download of seminar report and ppt in pdf and doc format. In design classes, we most of the time we refer that code because, wherever you have any dispute or another thing, that is the code it will help us to solve that problem. A civil engineer must know all the aspects regarding the flat floor system. Flat slab analysis and design free version download for pc. They may be supported on two opposite sides only fig. 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. Flat slab system is a vital part of concrete floor system. Punching of flat slabs design for shear at the column heads. Specifications for design of footings as per is 456. Dhang, department of civil engineering, iit kharagpur. Reinforced concrete design 1 design of slab examples and. Design of reinforced concrete structures ii twoway slabs 1 1.
Fe analysis of structural systems concepts and procedures 18ccs11 ppt. The grade of steel used is either fe 415 or fe 500. Following are the rcc slab design and detailing guidelines. The following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. Beside this, due to shear problems at column heads, the thickness of flat slab is greater. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. Design manual to bs8110 outline of the bs8110 design process outline of the bs8110 design process calculate vc concrete shear capacity without reinforcement the design process for the now withdrawn bs8110 design standard works slightly differently to that used in. Bending will take place in the two directions in a dishlike fo. Flat slabs may have drop panels at columns and columns may have capitals. Plan view of floor system assume partitions will not be damaged by deflections. Here the following topics of flat plate slab is discussed. Designing for shear in slabs including punching shear. Department of mechanics, materials and structures english.
Posttensioned concrete design spreadsheet program a pdh. Flat slab seminar report, ppt, pdf for civil engineering. Reinforced concrete design 1 design of slab examples. Design an interior panel of a flat slab of size 5 m. General a slab is a flat two dimensional planar structural element having thickness small compared to its other two dimensions. The output of the program for the slab in the example is shown in the following pages. The analysis and design follow the equivalent frame analysis method of the aci code, which considers a onebay wide strip of the floor system as a continuous frame. Using ram concept a powerful slab design software offered by bentley. Ppt design and comparison of flat slab using is 456 2000 free download as powerpoint presentation. Detailing solid slabs flat slab design includes flexure worked example exercise punching shear. The strip may have up to 20 spans and may have cantilevers at the ends.
Flat slab types of flat slab design and its advantages. Analysis of flat sanalysis of flat sllabab design for bending edge panels apportionment of moment exactly the same as internal columns max. Slab resting on walls or sufficiently deep and rigid beams on all sides. Section 3 general design consideration 18 bases rlr design 18. Slabs and flat slabs lecture 5 19 th october 2016 contents lecture 5 designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. The slab is for an offi ce where the specifi ed load is 1. Fanella, which appeared in the october 2001 edition of structural engineer magazine. Flat slab, is 4562000, aci 31808, bs 81101997, ec2 part i. Comparative study of waffle slabs with flat slabs and.
This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. A civil engineer should have clear and concise ideas on all the features of the flat floor system. 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. The lateral loads are independently resisted by shear walls. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Continuous one way slab figure 1 shows a clear area of 12 m x 8. How to design a flat slab, step by step explained in this video. Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf.
The slab is supported on beams of size 225 x 500 mm spaced at 4. In case of slab s 2, the design for panel 2 is similar to the design for panel 1 for slab s 1 and slab s 3, moment of inertia of edge slab, i s. Plain and reinforced concrete code of practice ced 2. 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. Reinforced concrete sk 33 section through slab showing stress due to moment. Flat slab analysis, design and detailing pdf civil engineering. This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. Unless otherwise noted, all referenced table, figure, and equation numbers are from that article. Design of flat slab with edge beams by direct design method 16 14 14 3 b c 1 c 2 c 3 c 4 3 1 c 5 c 6 c 7 c 8 c 9 14 c 10 11 c c 12. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. The diameter of main reinforcing bars shall not be less 10 mm. Must watch basics of flat slab for better understanding from the link given below.
Flat slab design includes flexure worked example exercise punching shear. Ec2 webinar autumn 2017 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Must watch basics of flat slab for better understanding from the link. It provides a working flat surface or a covering shelter in buildings. Is 45620002 distribution of moments across panels for. General after making an initial selection of the slab thickness, the second step in slab design is to determine the amount and distribution of prestress. The design shear force can be reduced to account for the loads applied inside the outer perimeter.
A six storey building for a commercial complex has plan dimensions as shown in figure 1. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. This paper deals with the comparative study of waffle slabs with flat slabs and conventional rcc slabs and highlights the advantage waffle slabs have over flat slabs and rcc slabs. Jul 02, 2010 lecture series on design of reinforced concrete structures by prof. Information on other aspects, su ch as materials, construction methods, placement of. Design manual to bs8110 linkstud psr limited co brooks forgings ltd doulton road cradley heath west midlands. Design considerations for reinforced concrete flat slab. Analysis and design of slabs two way civil engineers pk. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2. The slab is 300 mm thick and columns are 400 mm square. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. The following example illustrates the example building.
For help on designing a slab using this method, go to helpcontentsgraphical interface help concrete design modeexamplesbs8110 british code examplesslab design. Mar 1, 2017 reinforced flat slab design excel sheet best online engineering resource. To study the seismic performance of flat slab buildings, designed for different codes, two sets of buildings, 5 storey and 10 storey tall, with identical plan shown in figure 2 have been considered. Hi everyone, this video is all about the design of flat. The minimum reinforcement according to slab and beam elements as appropriate should be followed, unless otherwise specified. These materials are originally located at different websites. Design of slab for flexure 067 m unit width of slab. Design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications preceding construction of slabsonground. Flat slab 1 design slab rc slab design ec2 worked example bending reinforcement a short. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Reinforced flat slab design excel sheet best online. Lecture series on design of reinforced concrete structures by prof. Design considerations for reinforced concrete flat slab floor.
The building is located in seismic zone iii on a site with medium soil. Download file pdf flat slab manual design bs flat slab manual design bs flat slab design example part 1 how to design a flat slab, step by step explained in this video. Analyze and design flat slab or waffle slab floors. The ribs are reinforced with steel to resist flexural tensile stresses. 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. Design of flat slab with edge beams by direct design method 16 14 14 3 b c 1 c 2 c 3 c 4 3 1 c 5 c. In this example, the calculating value of the effective depth d v is equal to the effective depth d minus the concrete cover c on the bottom surface of the slab. This report is intended to serve as a manual of good practice for the design of prestressed concrete flat slabs in addition to the recommended procedures, other methods are described for the sake of completeness and to compare different methods of design. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. As manual calculation method the method of substitutive frames or substitutive. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. The pca computer program pcaslab can be used to expedite the design of different slab systems. Equivalent tensile stress design appendix 5examples using shrinkagecompensating concrete, p.
Pdf design of flat slab worked example mohamed hussein. Dec 07, 2017 hi everyone, this video is all about the design of flat slab part1 as per is 456 2000 in hindi. The design of waffle slab is done in such manner so as to achieve better load distribution. Flat slab system is an important division of concrete floor system. Design of reinforced concrete structures ii twoway slabs. Introduction to bs8110 design worked examples square or circular loaded areas. Flat slab types of flat slab design and its advantages flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams.
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