How to design a flat slab, step by step explained in this video. Oneway and twoway slabs university of asia pacific. Mar 24, 2014 design and detailing for bending moment i division of panels and bending moments flat slab panels are divided into column strips and middle strips as shown in figure 1. Pdf flat slab building is very popular from the aesthetic and architectural point of view. Flat slab analysis, design and detailing pdf civil. Usually the height of drop panels is about two times the height of slab.
Blast design procedure for flat slab structures dtic. Find the following parameters for design moments in step 2 per unit width step 4 note. If you continue browsing the site, you agree to the use of cookies on this website. Reinforced concrete flat slabs are commonly used in construction as they provide a number of benefits to the designer including. Development of some design charts for slab, beam, column and flat plate 121 2. In the structural analysis of flat slabs, the punching shear strength has a noticeable effect on the slab design parameters including slab thickness. This method allows the design of irregular column layoutsand can provide 4. This assumes that the slab thickness has previously been determined during conceptual design. L center to center distance between the support b depth of slab. Flat slab types of flat slab design and its advantages.
Whether it is residential, industrial or commercial slab design, we understand the various types of flooring systems and can specify the most economical solution, given your unique requirements. Design considerations for reinforced concrete flat slab floor. The present objective of this work is to compare behavior of flat slab with old traditional two way slab. Flat plate concrete floor system does not use beams between columns or. This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns. The benefits of using insitu concrete flat slab construction should be investigated at the conceptual design stage. So, we have a few more lecturers, so today we shall start part 1.
Flat slab analysis, design and detailing pdf civil engineering. The following example illustrates the example building. The pca computer program pcaslab can be used to expedite the design of different slab systems. The distribution of reinforcement throughout the slab is based on the elastic distribution of design moments outlined by the american concrete. Design of slab for flexure 067 m unit width of slab.
The slab has to carry a distributed permanent action of 1. Introduction to flat slabs modelling of reinforced concrete. Ms excel is done to design both types of flat slabs. The following example illustrates the design methods presented in the pca book simplified design. Please select the grade of concrete for twoway slab construction. The benefits of using insitu concrete flat slab construction should be. Analysis and design of flat slabs using various codes. However, the span influencing their design is the longest and they require more steel compared to twoway slabs. Dhang department of civil engineering indian institute of technology kharagpur lecture 14 design of slabs today, we shall start design of slabs. A procedure for carrying out the detailed design of flat slabs is shown in table 1 below. Design of one way and two way slabs, design of staircases. Performance of shear reinforcement against punching.
Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Thin sections allowing for greater roof heights and lighter floors. Drops should be ignored if the smaller dimension of the drop is less than onethird of the smaller dimension of the panel. Application of limit state method to rectangular beams for flexure, shear, bond and torsion. Effective span of slab shall be lesser of the two 1. Slab thickness a flat plate floor system is a twoway concrete slab of uniform depth without interior beams, drop panels or. Scribd is the worlds largest social reading and publishing site. 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. Structural drafting india commitment to support slab design services requirement to worldwide architectural, professional engineering, and contractor. And this is your lecture number 14, design of slabs part 1. Comparative study of flat slab with old traditional two way slab.
Minimum slab thickness of rc slab to prevent undesirable. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Abstract recently, flat slab buildings are commonly used for the construction because use of flat slab building provides many advantages over conventional rc frame building in terms of economical, use of space, easier formwork, architectural flexibility and importantly shorter construction time. Flexible column arrangements, this is more difficult to achieve for a beamcolumn design. The rest of the floor can be slightly thinner with less dead weight. Reinforced concrete design 1 design of slab examples and. Flatslab type of construction is in widespread use in mediterranean and middle eastern countries, which. It was actually the widespread use of the posttensioned slab onground which induced this interest in design procedure and in many studies of reported slab failures. Comparative study of flat slab with old traditional two. The recommendations derived from these and other studies vary from extremely light to extremely heavy. The idea is to reach a definite conclusion regarding the superiority of the two techniques over one another. Framed, twoway, conventionally reinforced, concrete flat slab and flat plate construction and design d. Seismic analysis of flat slab by using etabs international journal. Design for rc flat slabs column strength of materials.
Explore flat slab with free download of seminar report and ppt in pdf and doc format. Punching of flat slabs design for shear at th e column heads. The design mix concrete is preferred to the nominal mix as the former. Design for rc flat slabs ir prof dr j chiang outline definitions punching shear problem code provisions. Flat slabs are less labour intensive, simplify the installation of services and can accommodate more floors within restricted heights. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. 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 sk 33 section through slab showing stress due to moment. Relevant information on these subjects can be found in the literature.
Limit state of collapse and limit state of serviceability. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110. They may be supported on two opposite sides only fig. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Detailed explanation for design and detailing settings available a. Simply supported slab upliftment of corners continuous slab no upliftment. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Analysis and design of flat slabs using various codes issuu. The committee is continuing study of these aspects of connection design. See references 5, 11, and through 18 for slab shear reinforcement. Twoway slab design panel select boundary condition of slab for upliftment of corners. The benefits associated with flat slab construction may well outweigh those of other structural solutions, which could be more complicated, timeconsuming and ultimately more costly. It was actually the widespread use of the posttensioned slabonground which induced this interest in design procedure and in many studies of reported slab failures.
However, the span influencing their design is the longest and they require more steel compared to. Asce, secb course content flat plate and flat slab systems flat plates. Study on flat slab and conventional slab mitan kathrotiya1 dr. Design of reinforced flat slabs to bs 8110 ciria 110. Guide to the design and construction of reinforced concrete flat slab. Framed, twoway, conventionally reinforced, concrete flat. Design for rc flat slabs free download as powerpoint presentation. Designing for shear in slabs including punching shear. Must watch basics of flat slab for better understanding from the link given below. Slab designs structural slab designs structural slab.
Today, the flat plate form is preferred for light loads and short spans. Department of mechanics, materials and structures english. 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. Design considerations for reinforced concrete flat slab. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Analysis and design of rcc and posttensioned flat slabs considering seismic effect. Pdf the posttensioning method is now a days increasing widely, due to its application. Flat slab seminar report, ppt, pdf for civil engineering. 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. Apr, 2018 this video features the design of flat slabs with defined drop panels and design strips. Flatslab construction definition is reinforcedconcrete floor construction not requiring beams and girders to transmit the floor load to supporting columns.
Pdf analysis and design of rcc and posttensioned flat. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. 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. Mar, 20 title slide of design of reinforced flat slabs to bs 8110 ciria 110 slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This video features the design of flat slabs with defined drop panels and design strips. In case of one ways slabs, the aci approximate analysis is applicable to one way slab system where a one way slab is continuous with a one way slab. Concept designs prepared assuming detailed design would be to bs 8110 may be continued through to detailed design using eurocode 2. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. Development of some design charts for slab, beam, column. Department of mechanics, materials and structures english courses. Specially, it integrates slab design moments across design strips and designs the required reinforcement.
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. In structural design of reinforced concrete flat slab column connection the main idea is to ensure adequate rotational capacity to the connection zone, both for monotonic and cyclic loadings. In design mix, the proportions of cement, aggregates sand and gravel, water and mineral admixtures, if any, are actually designed, while in nominal mix, the proportions are nominally adopted. Introduction to flat slabs modelling of reinforced. Pdf flatslab building is very popular from the aesthetic and architectural point of view. Title slide of design of reinforced flat slabs to bs 8110 ciria 110 slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Department of mechanics, materials and structures english courses reinforced concrete structures code. Flat slab resting directly on columns flat slab with drop panels fla.