Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. 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. The waffle slab has been considered as monolithically connected to band beams. Design procedure of twoway slabs using aci moment coefficients. They may be supported on two opposite sides only fig. Design considerations for reinforced concrete flat slab. Following are the rcc slab design and detailing guidelines. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Dhang department of civil engineering indian institute of technology kharagpur lecture 14 design of slabs today, we shall start design of slabs. The slab has to carry a distributed permanent action of 1.
The basic philosophy in the design of flat slab is to consider only gravity forces. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Plzsubscribe this video deals with the basic of flat slab and the clauses of is 456 2000. Flat slab system is a vital part of concrete floor system.
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. Hi everyone, this video is all about the design of flat slab part1 as per is 456 2000 in hindi. Flat slab common practice of design and construction is to support the slabs by beams and support the beams by columns. 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. Design of reinforced concrete structures ii twoway slabs 1 1. A flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Calculation of approximate depth from deflection criteria cl 23. Ppt design and comparison of flat slab using is 456 2000 free download as powerpoint presentation. Analysis and design of flat slab with and without shear wall international organization of scientific research 35 p a g e discussions. So, we have a few more lecturers, so today we shall start part 1. A civil engineer must know all the aspects regarding the flat floor system.
The design is carried out as per is 456 2000 and for reinforcement detailing sp 34 is used. This assumes that the slab thickness has previously been determined during conceptual design. What should be the design procedure for designing a flat. Feasibility of structural design of members has been ensured under the provision of is. Oneway and twoway slabs university of asia pacific. Bending will take place in the two directions in a dishlike form. Flat plate with spandrel beams and flat slab two way beams supported slab. Helpcontentsgraphical interface helpadvanced slab design mode elsewhere in this forum, you will find numerous discussions on designing slabs using ram concept. A procedure for carrying out the detailed design of flat slabs is shown in table 1 below. Mar 1, 2017 reinforced flat slab design excel sheet best online engineering resource. 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. Plain and reinforced concrete code of practice ced 2. We can take the effective span and we shall get it in clause 22. Flat slab analysis, design and detailing pdf civil.
This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Flat slab system is an important division of concrete floor system. The best flat slab analysis, design and detailing related pdf and slides are provided here altogether. Section 3 general design consideration 18 bases rlr design 18. 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. The study examines the performance of flat slab with shear walls in multistorey buildings. Calculate aspect ratio aspect ratio 2 longer spanshorter span 2. These materials are originally located at different websites. Analysis and design of flat slab with and without shear. Page 14 example1 try5 9242008 flat slab analysis and design job. Department of mechanics, materials and structures english. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Pdf flat slabs are highly versatile elements widely used in construction.
Flat slab seminar report, ppt, pdf for civil engineering. The following limitations apply to the slab system. Please read the lauses mentioned in the video while solving the problem. This spread sheets is useful for design of cantilever slab as per is 456. 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. There must be at least 3 continuous spans in each direction viz column strip, middle strip, column strip the panels should be rectangular and the ratio of longer. Concept designs prepared assuming detailed design would be to bs 8110 may be continued through to detailed design using eurocode 2. This is your beam column, so this is your, we can design it as i said flat slab.
Slab resting on walls or sufficiently deep and rigid beams on all sides. A civil engineer should have clear and concise ideas on all the features of the flat floor system. Analysis and design of slabs two way civil engineers pk. Flat slab types of flat slab design and its advantages. Guide to the design and construction of reinforced. The investigation shows that, the weight of flat slab.
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. Reinforced concrete slab design and detailing guide is456. Pro model is exported to ram concept and the design of that slab is done by ram concept. In this video deisgn of two way slabs has been covered using is 456. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place.
Twoway slabs have two way bending unlike oneway slab. Flatslab construction has been widely used in construction today because of many advantages that it offers. The beams reduce the available net clear ceiling height. Keywords rc flat slab, direct design method ddm, equivalent. Flat slab analysis, design and detailing pdf civil engineering. And this is your lecture number 14, design of slabs part 1. Guide to the design and construction of reinforced concrete flat slabs contents membersof the projectsteeringgroup list of tables vii iv list of figures v 1. 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.
Explore flat slab with free download of seminar report and ppt in pdf and doc format. Reinforced flat slab design excel sheet best online. Must watch basics of flat slab for better understanding from the link. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. 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. Reinforced concrete design 1 design of slab examples. Beside this, due to shear problems at column heads, the thickness of flat slab is greater.
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