It is important to know the influence of the longitudinal reinforcement distribution in the flat slab behaviour. Behavior and reinforcement of oneway slab the structural frame consists of four columns, two beams and one slab. Flat slab analysis, design and detailing pdf flat slab system is an important division of concrete floor system. The investigation shows that, the weight of flat slab structure is less compared to conventional slab structure. Reinforcement detailing of a slab is done based on its support conditions. This is further explained in a companion best practice guide, rationalisation of flat slab reinforcement. Reinforcement details of concrete beams and slabs should specify clearly about cover to reinforcement, length of reinforcement, curtailment of reinforcement, number and diameter of reinforcement to be provided. Influence of stirrup detailing on punching shear strength of. Reinforcement for internal panels reinforcement are arranged in 2 directions parallel to each span. Detailing of individual types of members are included in the respective. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. Dear all, i face a difficulty in doing the reinforcement details for the flat slab with opening.
Bar bending schedule plays a vital role in finding the quantities of reinforcement in structure. Slab supported directly by columns are called flat slab. Finally, an example of a flat slab floor system is presented to illustrate the practice. Twoway flat plate concrete floor design a plan of a flat plate concrete floor without spandrel beams is shown in figure 1. Flat slab types, uses, advantages and disadvantages. Although not included in astm c478, plants may use astm a706 reinforcing steel when welding reinforcing mats. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. As no beam is used, floor height can be reduced and consequently the building height will be reduced. A bentup bar called as crank bar is provided to make rcc slab safe from compressive stresses. 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. Slab supported straightforwardly through columns are known as flat slab. Punching of flat slabs design for shear at the column heads. The rib reinforcement follows the same rules with the beam reinforcement. Pdf recommendations for reducing progressive collapse.
Detailing of reinforcements in beams and slabs plays an important role in providing strength, durability and cost optimization. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Design considerations for reinforced concrete flat slab. Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams.
Usually, when a slab is supported by a beam the support is considered to be pinned. Design considerations for reinforced concrete flat slab floor. For lighter loads the column heads and drop panels are eliminated, such flat slab with constant thickness supported on prismatic columns are called flat plate. Reinforcement detailing of reinforced cement concrete slabs. Flat slab analysis, design and detailing pdf civil. The thickness of the slab is sufficient if shear reinforcement is used. A civil engineer must know all the aspects regarding the flat floor system. Advantages and disadvantages of flat slabs civil engineering. Manual for design and detailing of reinforced concrete to. Manual for design and detailing of reinforced concrete to the september 20. Flat slab provided reinforcement interpretation of results. Design of flat slabs for punching european and north american practices. Reinforcement detailing of reinforced concrete slabs.
Influence of the top reinforcement detailing in the behaviour. Manual for design and detailing of reinforced concrete to the. Design considerations for reinforced concrete flat slab floor system. In this post, we are going to explain how to calculate steel quantity for the slab. Flat slab provided reinforcement interpretation of results i am having a problem with the consistency of results displayed by different methods within the slab provided reinforcement view. Manual for design of slabs, pile caps and footings. How to detail reinforcements of twoway slabs quora. Rationalisation of flat slab reinforcement construct concrete. The design i am going to share with you today is design of flat plate slab as by definition. This educational solved example for the design of reinforced concrete flat slab with drop panel, and check for punching shear. Find effective depth d, assuming reinforcement diameter. Step 3 cover to reinforcement determine cover required to reinforcement as per tables 11. Two experimental slabs were tested a and b with different types of reinforcement detailing to study the influence of the top reinforcement concentration in the behaviour of flat slabs.
Pdf flat slab structural systems are amongst the oldest methods to. 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. Drawing labels, details, and other text information extracted from the cad file translated from galician. Engineering society its the first platform for all engineers we share good technical articles and free pdf ebooks and free excel spreadsheets for all engineers. Architectural engineering senior thesis washington park condominiums final. Flat slab types, uses, advantages and disadvantages what is flat slab. If you require any further detailed advice regarding the design and detailing of punching shear reinforcement to either the ec2 or bs8110 standards, please do not. The study concludes, flat slab structures are the best solution. Slab reinforcement and beam reinforcement details daily. Flat slab detail dwg full project for autocad designs cad. The reinforcement for the column strip was design for the direction from easttowest only. Reinforcement calculation detailing beams beam 2 case 1 beam b case 3 slabs slab ab12 case 1 columns column b2 case 2. Influence of the top reinforcement detailing in the. Slab may be supported on walls or beams or columns.
Reinforcement design is one of the critical parts of flat. Manual for the design of reinforced concrete building. Department of mechanics, materials and structures english. Reinforcement conventional reinforcing steel typically used in base slabs and flat slab tops. Different types of shear reinforcement used at column heads. Dissemination of information for training brussels, 2021 october 2011 25 eurocode 2 background and applications. Rationalisation is the elimination of redundant variation. Slab design will consider all aspect like bending moment, shear force, cracking and area of reinforcement. Ec2 webinar autumn 2017 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Aug 30, 2014 the design i am going to share with you today is design of flat plate slab as by definition. Flat slab is an rcc slab built monolithically with supporting columns and reinforced in two or more directions. Two experimental slabs were tested a and b with different types of reinforcement detailing to study the influence of the. Reinforcement detailing for opening in flat slab and beam. In the past, several investigations took place but no theory so far could describe the punching shear behavior of flat slabs with shear reinforcement satisfactorily.
Pdf design of reinforced concrete flat slab with drop. For better view, please read this post in landscape mode if you are on the mobile device. The real cost parameter is the ratio of costs of labor relative to material. Between the ribs, the slab is usually reinforced with a common wire mesh. The thickness of slab over columns is also increased to support heavy loads and the thickened part of the slab is called drop panel.
However, mainly as far as the stirrups are concerned, the amount of placed rebars is not as large as it is in beams. From assembly plant, the construction system of the flat slab of a commercial project is detailed. For b oth one way and two way slab with an example. Flat plate concrete floor system does not use beams between columns or. In line with the objectives of the egan report, the primary objective of the. Typical detailing of reinforcements in beams and slabs. Perform flexural analysis and design for a typical design strip along grid 2 by utilizing the two methods permitted in chapter of aci 318, direct. Content introduction benefits design considerations design methodology analysis of flat slab detailing. As reinforcement detailing of flat slab is simple, it is easier to place. Rationalisation of flat slab reinforcement alternative punching shear reinforcement for flat slabs approaches to flat slab design.
Several techniques have been used to improve the punchingshear performance. In order to find out the bar bending schedule for slab or steel reinforcement in slab, i recommend you to learn basics of bar bending schedule and how to adopt concrete cover for different components of a building. Flat slab analysis, design and detailing pdf civil engineering. Perform flexural analysis and design for a typical design strip along grid 2 by utilizing the two methods permitted in chapter of aci 318, direct design method ddm, and equivalent frame method efm. 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. Anchorage and lap splicing detailing of slabs, columns. Draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns. Manual for design and detailing of reinforced concrete to the code. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. The rest of the floor can be slightly thinner with less dead weight. The reinforcement provided for other purpose can also act as effective ties if.
This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. A flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Detailing solid slabs flat slab design includes flexure worked example exercise punching shear. Design manual to bs8110 bs8110 general detailing rules. Department of mechanics, materials and structures english courses reinforced concrete structures code.
Flat slab seminar report, ppt, pdf for civil engineering. At the point when the depth of web or rib in a beam crosses 750 mm, the side face reinforcement of cross sectional area at the very least 0. To optimise the slab thickness, consider all factors such as the method of design, the. The listed characteristic values in the table are based on local studies. As reinforcement detailing of flat slabs is simple it. Introduction benefits design considerations design methodology analysis of flat slab detailing. In one way slab, major reinforcement is along the side of smaller direction and the reinforcement along the side of longer direction is known as distribution steel. The calculated punching shear capacity and relevant reinforcement detailing depend much more on the code applied than the flexural reinforcement for example. Design of flat slabs for punching european and north. Rationalised reinforcement in the insitu concrete building at cardington this guide provides recommendations for the efficient and economic reinforcement of concrete flat slabs. The steps i have taken to get to where i am after creating model etc. Rationalisation of reinforcement, design and installation processes are considered. Buildinghow products books volume a the reinforcement.
Reinforcement detailing of isolated footing in safe 2016 duration. Anchorage and lap splicing detailing of slabs, columns, beams. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Reinforced slab is a flat element that used in floors, roofs and.
The slabs possessing ratio of longer length to its smaller length lylx higher than 2 is known as one way slab or else as two way slab. Sep 03, 2011 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. Influence of stirrup detailing on punching shear strength. First, find number of rods required for main reinforcement and distribution.