But it says in the calculation errors list and the slab reinforcement module as in message 4 that the reinforcement is frozen. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. Difference between one way slab and two way slab system. The main reinforcement for twoway slab are designed in two directions which. Terminology layout drawing a layout drawing of a particular floor contains a drawing of vertical loadbearing structural. Reinforced concrete sloped roof slab overhang detail section detail of a reinforced concrete sloped inclined slab overhang cantilever detail, supported from a concrete beam. The lateral loads are independently resisted by shear walls. Chapter 18 concrete slab structures january 2019 183 18.
Cantilever longitudinal and transverse reinforcement bars, supporting beam reinforcement details, adjucent slab top bottom reinforcement. Wisconsin department of transportation bridge manual. Asw area of shear reinforcement in each perimeter around the col. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. Slab may be supported on walls or beams or columns. Early twoway flat slab construction was built and subjected to load tests in place and scaled models were later tested in laboratories. Flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Drafting principles for layout and reinforcement drawings. C 5 is the slope correction coefficient co is the consolidation correction coefficient as an example.
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. These materials are originally located at different websites. Department of mechanics, materials and structures english. Guide to the design and construction of reinforced concrete. Analysis of flat sanalysis of flat sllabab moment division example 6000 6000 6000 6000 6000 5000 layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls. Manual for design and detailing of reinforced concrete to the code. Performance of ductile rc flat slab to steel column. Drop panels play a significant role here as they augment the. These slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs or other types of structures. In twoway slab, the live load moments due to a concentrated or locally distributed load may be worked out by pigeauds method but when the deck slab is not made monolithic with the cross beam i. The thickness of the slab has to be increased or the slab has to be shear reinforced. Select reinforcing bars for the slab and concentrate bars near the column, if necessary 5. Flat slab haunched slab a longitudinal slab is one of the least complex types of bridge superstructures. Basically, this paper is focused on the comparison in materials between the two slab systems.
This guide provides recommendations for the efficient and economic reinforcement of concrete flat slabs. Ec2 webinar autumn 2017 lecture 93 minimum mandrel size. Pci manual for the design of hollow core slabs second edition by donald r. Prestressed concrete flat slabs notation page i a area, constant in longs formula a,b sides of rectangle a is smaller side a ps area of prestressing tendon a s area of bonded reinforcement a 1,a 2 dista nce from support to point of change of curvature in tendon a cr dist an ce from surface of reinforcement bar to position of crack. Analysis and design of flat slabs in commercial building by. 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. Best practice guide, rationalisation of flat slab reinforcement. Information on other aspects, su ch as materials, construction methods, placement of concrete, and finishing techniques, is. Manual for design and detailing of reinforced concrete to the. Difference between one way slab and two way slab system the one way and two way slab systems are the most commonly used floor system in the reinforced concrete structure. Report bygdtu r074 2003 by gudmandhoyer technical university of denmark enclosure c2 a guidance to calculate the moment capacity in a bubbledeck joint. Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures.
Bending will take place in the two directions in a dishlike form. In flatplate floors, slabcolumn connections are subjected to high shear stresses produced by the transfer of axial loads and bending moments between slab and columns. Find effective depth d, assuming reinforcement diameter. Drops should be ignored if the smaller dimension of the drop is less than onethird of the smaller dimension of the panel. The concrete society, technical report 64 guide to the. Fire tnoreport for the weena tower rotterdam enclosure d1. Manual for design and detailing of reinforced concrete to. This manualfollows in the footsteps of influential guides published by the institution of structural engineers and uses the format of the green book manualfor bs 8110.
Reinforced flat slab design excel sheet best online. Concrete floor slab construction process includes erection of formwork, placement of reinforcement, pouring, compacting and finishing concrete and lastly removal of formwork and curing of concrete slab. Design beams if any, using procedures you learned in civl. Reinforcement l beam reinforcement details l reinforcement detailing of beam l steel reinforcement duration. To study the behavior of flat slab commercial building in various seismic zones. In flat plate floors, slab column connections are subjected to high shear stresses produced by the transfer of axial loads and bending moments between slab and columns. A flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. The diameter and spacing of the top reinforcement bars bottom if a transfer slab. This report presents the structural engineering calculations of a posttensioned flat slab supported on columns, using hong kong building code hkcop 2004 and its amendment of june 2007. Pdf files in the structure component plans for each bridge number following the. Draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab.
Although structures having concrete compressive strength exceeding 6000 psi are within the realm of this document, the recommendations limit. How to design a flat slab, step by step explained in this video. Prepared for the pci hollow core slab producers committee john e. Analysis and design of flat slabs in commercial building. For a bar adjacent to the face of the member, ab should be taken as. Apr 12, 2018 two way slab full detail explanation diagrams with site below these links are our civil videos learn field work watch and subscribe for more videos building drawings analysis in telugu. Design of reinforced concrete structures ii twoway slabs. Two way slab without beams is carried out on the basis of economy. Introduction to flat slabs modelling of reinforced concrete.
Design of reinforced concrete structures ii twoway slabs 1 1. Drawing principles for layout and reinforcement drawings rozvojove projekty msmt cr rozvojove projekty mladych tymu 4 1. The opening that the architect wants to put is for a scupper drain which have a width of 150 on plan and a depth of approximately 100mm the drain is just to connect to the oil interceptor. Reinforcement detailing of reinforced concrete slabs. While the amount of reinforcement in slab construction varied dramatically, flat slab systems were found to be economical for heavy live load occupancy. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. Note we need to calculate the typical ls for the 1 st half only, for the 2 nd half we will multiply it by 2 excluding the main bar circular slab reinforcement calculation. Dear all, i face a difficulty in doing the reinforcement details for the flat slab with opening.
A civil engineer must know all the aspects regarding the flat floor system. Step 3 cover to reinforcement determine cover required to reinforcement as per tables 11. Flat slab types of flat slab design and its advantages. Mar 23, 2015 the distribution of slab moments into column strips and middle strips is to be made in the same manner as specified in direct design method. Twoway joist concrete slab floor waffle slab system.
Flat slab seminar report, ppt, pdf for civil engineering. Flat slab analysis, design and detailing pdf civil. Shear reinforcement to check if shear reinforcement and which system can be used, one can calculate the minimal needed value of factor k sys. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j.
Transverse reinforcement at laps bars in tension ec2. Thin sections allowing for greater roof heights and lighter floors. If no gap between the deck slab and the cross beams is maintained, the slab panel becomes a twoway slab continuous in both the direction. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci committee 340, design. Slab supported directly by columns are called flat slab. Must watch basics of flat slab for better understanding from the link given below. Guide to the design and construction of reinforced. As with the green book the scope of the manualcovers the majority of concrete building structures and has now been extended to cover slender columns and prestressed concrete. Also it should be positioned at the outer sections of the lap as shown. 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. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Rationalisation of flat slab reinforcement construct concrete. Manual for the design of reinforced concrete building.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. The following example illustrates the example building. 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. Flat slab analysis, design and detailing pdf civil engineering. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Reinforcement detailing for opening in flat slab and beam. Design manual to bs8110 bs8110 design preface please note that the linkstudpsr design and optimum pattern layout details can be calculated very simply, by using the free linkstudpsr design software available later in 2010 with the minimum of input.
Different types of shear reinforcement used at column heads. For flat plate slab system, the minimum slab thickness per aci 31814 are. To study the behavior of flat slab commercial building under different terrain categories. Reinforced concrete slab design and detailing guide is456. Design manual to bs8110 bs8110 design preface please note that the linkstudpsr design and optimum pattern layout details can. Design and detailing of flat slabs linkedin slideshare. Accordingly, main reinforcement is required in the two directions. Punching of flat slabs design for shear at th e column heads 12. Aug 27, 2015 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. Sep 03, 2011 draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Determine the area of steel required in the slab at critical sections for column and middle strips. 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.
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