Composite steel beams with metal deck formed slab n figure 5 two way spanning. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. Flat slab is an rcc slab built monolithically with supporting columns and reinforced in two or more directions. The linkstudpsr system comprises short lengths of carbon steel deformed bar reinforcement with end anchorages provided by enlarged, hot forged heads at both ends, giving a crosssectional area ratio of 9. Reinforced concrete pitched roof apex slab reinforcement detail. Reinforced concrete hidden beam cross section detail within the slab thickness flat slab beams. Cantilever longitudinal and transverse reinforcement bars, supporting beam reinforcement details, adjucent slab top bottom reinforcement. It dealt in detail with flat roof constructions and.
Dear all, i face a difficulty in doing the reinforcement details for the flat slab with opening. The rib reinforcement follows the same rules with the beam reinforcement. 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. Usually placed around slab openings where regular beam downstand is not architecturally preferred. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. However, mainly as far as the stirrups are concerned, the amount of placed rebars is not as large as it is in beams. It has to carry a live load of 4 knm2 and a finishing load of 1 knm2. 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. Guide to the design and construction of reinforced concrete. 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. Reinforcement cad drawing detail for a pitched inclined roof apex reinforced concrete sloping slab. Asw area of shear reinforcement in each perimeter around the col. Structure student of icoer, university pune, india 2assistant professor of civil engineering department icoer, university pune, india abstract. Manual for design and detailing of reinforced concrete to.
Flat slab analysis, design and detailing pdf civil engineering. A detailed explanation will be given of the checksto be carried out, the aspects to be. Determine the area of steel required in the slab at critical sections for column and middle strips. A typical reinforcement detailing is considered for column heads. Depth of equivalent compression stress block under fire conditions acr area of crack face ae net effective slab bearing area aps area of prestressed reinforcement avf area of shear friction reinforcement b width of compression face bw net web width of hollow core slab.
The slab is for an offi ce where the specifi ed load is 1. Introduction flat slab flat slab with drop panels flat slab with column head flat slab with drop panel and column head. Slab hidden beam reinforcement cross section detail. Details of slab reinforcement on the basis of bar bending schedule. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and. 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. 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. Twoway joist concrete slab floor waffle slab system. Different types of shear reinforcement used at column heads. Flat slabs are slabs that are supported directly by columns without floor beams. Reinforced concrete design 1 design of slab examples and. Flat plate reinforce concrete slab design architectural engineering senior thesis washington park condominiums final report mt. Architectural engineering senior thesis washington park condominiums final.
For a roof to be effective, surface water should be. Department of mechanics, materials and structures english. Instead, the floor is heavily reinforced in both directions. Mar 23, 2015 as span is same in both directions, provide similar reinforcement in both directions. 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. Twoway concrete slabs with openings the static system and the design of reinforcement. Flat slab analysis and design pdf flat slab design pdf 1. Between the ribs, the slab is usually reinforced with a common wire mesh. Flat plate concrete floor system does not use beams between columns or. These materials are originally located at different websites.
A bentup bar called as crank bar is provided to make rcc slab safe from compressive stresses. Curtailment of tension steel in simply supported beam and slab. Reinforcement conventional reinforcing steel typically used in base slabs and flat slab tops. Provide reinforcement according to the calculated moments after performing moment. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Manual for design and detailing of reinforced concrete to the.
Sep 10, 2017 bar bending schedule plays a vital role in finding the quantities of reinforcement in structure. Of course, beam strength is very much reduced from that of a regular beam. Reinforcement detailing of a slab is done based on its support conditions. Although not included in astm c478, plants may use astm a706 reinforcing steel when welding reinforcing mats. One way slab reinforcement details daily civil engineering. The thickness of the slab has to be increased or the slab has to be shear reinforced. For a continuous beams and slabs, the shear force and bending moment diagrams are drawn and reinforcement details are provided based on the value of the shear force and bending moment. Now calculate bar bending schedule for two way slab. Flat slab types, uses, advantages and disadvantages what is flat slab. Typical detailing of reinforcements in beams and slabs. The flat slab system is a special structural form of reinforced concrete construction that.
Reinforcement detail may be shown as was done in previous problem. Shear reinforcement to check if shear reinforcement and which system can be used, one can calculate the minimal needed value of factor k sys. L center to center distance between the support b depth of slab. Pdf irregular flat slabs designed according to the structural. Reinforcement details in one way slab before starting one way slab reinforcement let me clear what is one way slab. A reinforced concrete flat slab floor is a significant advancement in the building technology. Cantilever longitudinal and transverse reinforcement bars, supporting beam. Structural design of flat slabs to eurocode 2 structville. 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. Using a drop panel and a column capital in flat slab.
Lets take an example the below twoway slab diagram. When a slab is supported on the two different sides and the ratio of longer span to shorter span is equal to or greater than 2, it will be considered as one way slab. Reinforcement detailing of reinforced concrete slabs. Effective span of slab shall be lesser of the two 1. Design of reinforced concrete structures ii twoway slabs 1 1. Reinforcement detailing for opening in flat slab and beam. The flat slab is a twoway reinforced concrete slab that usually does not have beams and girders, and the loads are transferred directly to the supporting concrete columns. 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. Slab may be supported on walls or beams or columns. Bar bending schedule plays a vital role in finding the quantities of reinforcement in structure. Slab supported directly by columns are called flat slab.
Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1. Flat slabs can offer economical solutions to wider floor spans in a reinforced concrete building. Slab reinforcement and beam reinforcement details daily civil. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. The materials to be used are grade c25 concrete and grade 500 reinforcement. In this post, we are going to explain how to calculate steel quantity for the slab.
Behavior and reinforcement of oneway slab the structural frame consists of four columns, two beams and one slab. There are many advantages of flat slab such as increased head room, easier flow of mechanical and electrical services. Reinforced flat slab design excel sheet best online. Usually, when a slab is supported by a beam the support is considered to be pinned. Reinforcement details of continuous beams and slabs. Ec2 section 8 detailing of reinforcement general rules bar spacing, minimum bend diameter anchorage of reinforcement lapping of bars large bars, bundled bars ec2 section 9 detailing of members and particular rules beams solid slabs flat slabs columns walls deep beams foundations discontinuity regions tying systems. Slab reinforcement dynamic block autocad autodesk app store.
Shear reinforcement to check if shear reinforcement and which system can be used, one can. Also, experimental details of the nine flat slab panels, supported on. Notation a crosssectional area a depth of equivalent compression stress block a. Finally, an example of a flat slab floor system is presented to illustrate the practice.
The lateral loads are independently resisted by shear walls. Flat slab is a reinforced concrete slab supported directly by concrete columns without. Ec2 webinar autumn 2017 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Concrete slabs are commonly divided into the following types. Technical thestructuralengineer 35 technical guidance note. 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. Punching of flat slabs design for shear at the column heads. In flat plate floors, slab column connections are subjected. Rationalisation of flat slab reinforcement construct concrete. Explore flat slab with free download of seminar report and ppt in pdf and doc format.
A reinforced concrete flat slab, called as beamless slab also, is a. The main objective of the study is to study method of analysis and. Design beams if any, using procedures you learned in civl. Jan 11, 2017 reinforcement detailing of a slab is done based on its support conditions. Pdf flat slabs are highly versatile elements widely used in construction. The slab is 300 mm thick and columns are 400 mm square. Design considerations for reinforced concrete flat slab. Aug 14, 2017 it is for that reason that the flat roof construction manual focuses on the subject of designing energysaving flat roofs free from damage. Aci 318 emphasizes the importance of anchorage details and accurate placement of the shear. As reinforcement detailing of flat slabs is simple it is easy to place. Pdf in this paper the influence of the unit cost of steel, concrete and. A total of seven largescale flat plate slabs 1,700 x 1,700 x 150 mm were. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria.
The slab has to carry a distributed permanent action of 1. To optimise the slab thickness, consider all factors such as the method of. A reinforced concrete rc flat slab building is a kind of building in which floors are. 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. Also explore the seminar topics paper on flat slab with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for. A civil engineer should study these lectures and materials for structural engineering acumen. Flat slab analysis, design and detailing pdf civil. This is a dynamic block which enables you to easily add reinforcement to flat slabs and rafts. A flat slab consists of a reinforced concrete slab that is. Flat slab types, uses, advantages and disadvantages. If column heads are regarded as essential, detail them to be cast as part of the column to allow the advantages of flat soffits for the. Bending will take place in the two directions in a dishlike form. The column tends to punch through the slab in flat slabs, which can be treated by three methods. Reinforced concrete sloped roof slab overhang detail section detail of a reinforced concrete sloped inclined slab overhang cantilever detail, supported from a concrete beam.
Mar 1, 2017 reinforced flat slab design excel sheet best online engineering resource. It has been observed that possible failure mode of the reinforced concrete flat slabs is punching that occurs in the vicinity of a column. Select reinforcing bars for the slab and concentrate bars near the column, if necessary 5. In addition there is reinforcing steel in the floor at the columns to transfer the loads. Design of reinforced concrete structures ii twoway slabs. A flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. A rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Top and bottom reinforcement detail, additional apex reinforcement requirement. Flat slab seminar report, ppt, pdf for civil engineering. Guide to the design and construction of reinforced. Department of mechanics, materials and structures english courses reinforced concrete structures code. Flat slab types of flat slab design and its advantages.
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