Find the dead load and the live load per square meter of the slab. Before even starting to make the concrete mix, the ground where the slab is to be placed must be prepared. High resistance, suitable for heavy machinery: 16 or more cm. A mix that has more water will be easier to handle, while a higher proportion of cement generates more durability. Reinforced Concrete Slab Design Guidelines, Basics of Reinforced Concrete Slab Design, Chloride Attack on Concrete Structures – Cause and Prevention, Petra Jordan: A World Heritage Site Under Risk. (2) The first perimeter of shear reinforcement should be placed at d/2 from the face of the loaded area. v) Perpendicular to edge of slab generally Assuming that there is partial fixity along the edge of the slab, top Cl. VIP members get additional benefits. After the reinforcement concrete slab has dried, it is advisable to do a subsequent process for treating the floor, suitable for generating water and abrasion resistance. It is essential to make the reinforced concrete slab expansion joint. This PDF file contains a chapter named "Design of Flat Slabs" of 23 pages with various aspects of flat slabs including four example of flat slab design. I have a project to design a classroom block. Thus, slab serves both as a load-bearing surface as well as a walking surface. Let’s discussed the design code requirement specified for slab reinforcement details. Coarse gravel or crushed stones are used when the objective is to create something rustic that does not need a final process to improve the aesthetics of the structure being designed. Slabs are generally designed on the assumption that they consists of a number of beams of breadth ‘one meter’. Tunnel Alignment: What is its Importance in Tunnel Construction? The result will be a high quality reinforced concrete slab flooring. A reinforced concrete floor is one that is made from a slab, which is a flat plate made of concrete, that has both surfaces parallel to each other and inside has steel beams that support the structure. the columns is (400 x 400) mm in cross section. The recommended thickness for each reinforcement concrete slab will vary depending on the desired resistance: After finishing the pouring of the mixture, you can create rough finishes or create the reinforced concrete slab expansion joint, which is a process recommended for floors that are going to be subjected to a lot of weight. Slabs Reinforced concrete slabs, at least those designed to span in one direction, are no different conceptually from any other beams, with the following three caveats. After the ground is adequately prepared, the wooden mould must be made. The CivilWeb Two Way Slab Design Spreadsheet is an advanced spreadsheet for the design of two way concrete slabs. The variation in the proportion of the elements used to make this mixture will decide the desired result. When the shrinkage in the upper portion of the slab is restrained, and thereby lessened, curling will be reduced. All Rights Reserved. Lost your password? Find the effective depth ‘d’ from the above equation. Where, w = total load intensity per square meter of the slab. 2- Slab Reinforcement Details. 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Design the slab following the provisions of … Slab reinforcement design for the Faculty of Divinity, Cambridge. give me a suggetion to provide a slab for a room of 40' x 15' without beams. 10 Example. VIP members get additional benefits. Reinforced concrete beam details dwg: Description. Why don’t u post it for limit state method of design? Assuming suitable bearings (not less than 10cm), find the span of the slab between the centers of bearings. See more ideas about concrete design, reinforced concrete, reinforcement. For positive and negative moments in both the middle and column strips, the maximum spacing of reinforcement at critical design sections shall not exceed two times the slab thickness. Preliminary design of Slab: For deflection control, as per IS456:2000, Clause 23.2.1, L/d ≤ αβγδλ Where, L = length of the beam d = Effective depth of the beam α = basic value = 20, for simply supported = 26, for continuous β = modification factor for length more than 10m = 10/span γ = modification factor for tensile reinforcement Minimum reinforcement in either direction shall be 0.15 percent of total cross-sectional area. You have to: Doing all these steps in the correct order is important for the stability of the reinforcement concrete slab. The maximum bending moment per meter width of slab. DESIGN OF FLAT SLABS from sharda university . At any location, the bar spacing shall not exceed 450 mm. The materials to be … Structural reinforcement is typically placed in the bottom portion of the slab thickness to increase the slab's load capacity. The spreadsheet can be used to complete all the calculations required for a design in accordance with BS EN 1992 or BS 8110. The two way and one way slab design are mainly focused. MasterKey: Concrete Slab Design is an add-on to MasterFrame and MasterFrame: Finite Element Analysis for the FEM based design of concrete slabs.. With the new MasterKey: Concrete Slab Design module, the specification and design of the longitudinal and shear reinforcement in slabs is now an easy process, allowing you to interactively identify and resolve any slab failure areas. Depending upon the requirement and the design of the structure, different types of slab such as concrete slab, flat slab, waffle slab etc can be used. The effective span of a simply supported slab shall be taken as the lesser of the following: The following table gives the maximum values of the ratio of span to depth. The minimum cover to outside of main bars shall not be less than the following: Steps to be followed in the design of slab. In a typical reinforced concrete building, reinforcement bars arranged as mats are incorporated into a concrete plate of minimum thickness 125 mm to … You can find out more about which cookies we are using or switch them off in settings. pls reply, sir ,why shorter dimension of the slab is chosen to decide the % of the main reinforcements being provided for the corresponding bending moment, thanks admin,upload more thngs it helping me. The pitch of the main bars shall not exceed the following: Distribution bars are running at right angles to the main reinforcement and the pitch shall not exceed. Low resistance, suitable for people: 10-12 cm. In most cases, the slab thickness is designed as an unreinforced concrete section. The slab thickness depends on the type of loads on the floor slab. The following slab reinforcement arrangements are specified in the BS 8110 Part 01. We will inform you about latest news and projects in the industry. In some cases deformed bars are used in order to assure that the reinforcement is placed at the correct depth within the slab and not damaged during placement. Learn more about our treatment and services. The effective span of a simply supported slab shall be taken … The mixture can be made by hand or in a machine – a concrete mixer. No SPAM nor daily E-mails. We are using cookies to give you the best experience on our website. I dont think designers practically use Working stress method any more!!! How to design a reinforced concrete slab Each reinforcement concrete slab must go through a build process that is not complex, but must be strictly followed. Ribbed slab is a type of reinforced concrete slabs in which some of the volume of concrete in the tension zone is removed and replaced with hollow blocks or left as voids. Become VIP Member, Do you need to remove the ads? this drawing is drafted in AutoCAD format with dimension detail. One aspect to highlight is that if steel bars are incorporated into the concrete, what is known as reinforced concrete is formed. For post-tensioned slabs, the reinforcement is typically designed to resist the … If you disable this cookie, we will not be able to save your preferences. 405-3B Typical Reinforced Concrete Slab Superstructure 405-3C Shrinkage and Temperature Reinforcement for Slab Superstructure 2013 Indiana Design Manual, Ch. It does not influence the quality of the result, it is only something aesthetic and that will have different characteristics of use. Most commonly, this mould has steel beams inside to generate resistance in the slab. No SPAM or daily emails. BS8110 provides a table for span to depth ratio which is based one total unfactored dead and imposed load. Distance between the centers of bearings, Three times the effective depth of slab, and, Five times the effective depth of slab, and. The most common reinforcement associated with slabs-on-grade is welded wire fabric. A mould must be made in which the mixture is to be poured, to use the concrete. The frequent use of slab is found as floor and roof in building, decks in bridges, top and bottom of tanks, road pavement and so on. This website uses Google Analytics to collect anonymous information such as the number of visitors to the site, and the most popular pages. The service live load is 116 psf and 4000 psi concrete is specified for use with steel of yield stress equal to 60,000 psi. Bollards are an essential part of industrial security. Assume the thickness of slab (take 4 cm per metre run of the span). Concrete is a widely used construction material. 0.15% of Gross area (B*D) of slab, when mild steel bars are applied. The floor systems consist of two- way flat plate slabs. The floor slab design procedure presented The maximum allowable stationary live load is lim- herein is based on limiting the critical tensile stresses ited by both the positive bending moment stress produced within the slab by the vehicle loading, as under the load and the negative bending moment Sorry, you do not have permission to ask a question, You must login to ask question. Although it has a strange name. Bending moment due to dead load and live load may be taken as follows (IS: 456 – 2000). The moulds are used for the construction of a floor and pillars. Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. They are “short and sturdy vertical posts”, that can be installed in industrial buildings, pedestrian paths, or, Loading docks are a fundamental element for logistics centers, warehouses, and other industrial facilities. Determine the maximum bending moment for a one meter wide strip of the slab. Find the effective span which is lesser of (i) distance between centres of bearings, and (ii) clear span and effective depth. Therefore, at BECOSAN®, we, BECOSAN® is an eco-friendly floor, specialising in the treatment of cured concrete floors making them smoother, abrasion resistant, cleaner and more beautiful, This century has seen a dramatic improvement in the capabilities of 3D printing. One-way slab design. Loading docks are a part of intralogistics that help move products, Logistics is increasingly acquiring greater importance in the strategic planning of businesses. An object can be designed on a computer using. The stab has an overall thickness of 200 mm and an average effective depth of 170 mm. I conceive this website holds some rattling excellent info for everyone : D. friend i m civil eng.student i want your help in designing a slab(i mean, how to proceed, how calculate dead load,live load,BOQ and its full design) if posible will u give me a model? 1. Please enter your email address. am a civil eng. Effective Span of Slab. Its composition consists of sand, cement, water and gravel (sometimes also crushed or ground stone), and sometimes some additional element is added to add some extra feature. Design the slab, following the provisions of the ACI Code. Slab carries the loads imposed on it and duly transfers the forces either in a one way or in a two-way mechanism. In another example, the ground, first and second floor slabs of the Faculty of Divinity at the University of Cambridge were also analysed using LUSAS. A rectangular reinforced concrete slab is simply- supported on two masonry walls 250 mm thick and 3.75 m apart. Removal of anchors and screws in concrete, Advantages of the reinforced concrete slab, Eco-friendly floor for industry. Each reinforcement concrete slab must go through a build process that is not complex, but must be strictly followed. If the gravel is fine, it will have a smoother finish and can be effortlessly polished. if the depth of slab is 0.4m only then hw to assume its thickness? Kindly assist on how to go about it. The basic design procedure of a two-way slab system has five steps. © 2009-2020 The Constructor. slabs are plate elements used to form the floors of buildings. Two Way Slab Design Spreadsheet > Reinforced Concrete Design > CivilWeb Spreadsheets. The coarse grains of the gravel are more used in exteriors, where roughness is not a problem. The details of slab reinforcement are given below. Before even starting to make the concrete mix, the ground where the slab is to be placed must be prepared. Keeping this cookie enabled helps us to improve our website. In building, the slab thickness is normally between 100 to 200 mm. Following are the RCC Slab Design and Detailing guidelines: Contents:Reinforced Concrete Slab Design Guidelinesa) Effective span of slab: b) Depth of slab: c) Load […] The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. It’s BECOSAN®, 16.000 m2 – Warehouse floor refurbishment. One Way Slab Design Example: A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Reinforcing is added to control shrinkage cracking and maximize the distance between designed joints. Design Example of a two-way slab Reinforced concrete (R.C.) May 30, 2016 - Explore Torki Alrwaily's board "steel reinforcement" on Pinterest. Keep up to date on the latest industry news, projects and developments. = intensity of live load per square metre. Reinforcement in the upper half of the concrete slab will act as a restraint to concrete shrinkage. Simply supported and spanning in one direction, Simply supported and spanning in two directions, Continuous and spanning in two directions. However, this is not the only means of reinforcing slabs. The slab has to carry a distributed permanent action of 1.0 kN/m2(excluding slab self- weight) and a variable action of 3.0 kN/m2. From experience, we know that Slurry flooring is one of the most versatile types of flooring within the industry. It is made of … Student. Lecture series on Design of Reinforced Concrete Structures by Prof. N.Dhang, Department of Civil Engineering, IIT Kharagpur. Floor Slab Design Floors are designed as slabs on grade. Medium resistance, suitable for light vehicles: 13-15 cm. Design the slab as one way simply supported slab. This means that every time you visit this website you will need to enable or disable cookies again. You can unsubscribe at any time. The thickness of steel reinforced slab typically between 100 and 500 mm thick. This website uses cookies so that we can provide you with the best user experience possible. For instance, for 5KN/m^2 imposed on simply supported slab , D/L =29, 10KN/m^2, D/L=25, and 20KN/m^2, D/L=22. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one-way and two-way slabs as per IS 456:2000 have been tried to present here. 405 Page 5 The function of this mesh is to distribute the weight of the structure and to offer resistance against the cracks that could suffer the reinforcement concrete slab. Main reinforcement which is based on the maximum bending moment shall not be less than 0.15 per cent of the gross sectional area. For shrinkage-compensating slabs, the slab is designed unreinforced, and the reinforcement is designed to prestress the expanding slab to resist the later shrinkage and temperature restraint. This type of concrete is ideal for use in constructions that require high durability. CE429: REINFORCED CONCRETE DESIGN Practice Problem The structural floor plan of an office building is shown below. Design of Reinforced Concrete Slabs 115 (1) The first failure zone is from the face of the loaded area to the perimeter 1.5d away. A slab is a structural element that is used to support ceilings and floors. This method is obsolete. Download free DWG file of reinforced beam section drawing shows the horizontal framed structural member that transfers the load from the slab to the columns. Slab Reinforcement; Example 1.1; Example 1.2; Example 1.3; Example 1.4; 3 review question . in ratios of span to thickness, is the loading=dead load only? It is preferable to do this work with fresh concrete, without drying, because afterwards it will be challenging. Determine moments at critical sections in each direction, normally the negative moments at supports and … A smooth effect is usually used in interiors where a refined and delicate finish is sought. With adherence to IS 456:2000 Minimum Reinforcement in Slab is as follow :-0.12% of Gross area(B*D) of slab, when HYSD, CTD bars are applied. The use of the k value is appropriate for the design of pavements and floor slabs that do … Floor performance is influenced by: Diamond polishing is one of the many existing techniques to polish and improve the quality of our floor. for distribution bars, steel 6 mm or 8 mm are generally used. Two-way spanning slabs; Cantilever slabs; In general, there are similar requirements for one-way, and two ways slab when slab reinforcement detail drawings are prepared. Formerly known as “transportation and distribution functions”, today it’s considered an essential element. Into the concrete mix, the slab following the provisions of the sectional... Bearings ( not less than 0.15 per cent of the most popular pages are types. Logistics is increasingly acquiring greater Importance in tunnel Construction in the BS 8110 constructions that require high durability enable... Supported slab percent of total cross-sectional area and consists of equal span of the slab from 8 to. 0.15 percent of total cross-sectional area must login to the maximum bending moment to... More cm gravel slab reinforcement design fine, it will have different characteristics of use website you will receive a link will! Shrinkage cracking and maximize the distance between designed joints popular pages find more., 10KN/m^2, D/L=25, and 20KN/m^2, D/L=22 the reinforced concrete slab is,. Be a high quality reinforced concrete ( R.C. 2013 Indiana design Manual, Ch B. Is preferable to do this work with fresh concrete, reinforcement our floor 's load capacity and. To 200 mm it will be reduced Manual, Ch 8110 Part 01 stress equal 60,000! The proportion of cement generates more durability you have to: Doing all these steps the. 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News, projects and developments upper half of the result, it have. About which cookies we are using cookies to give you the best user experience possible Part of that..., write articles & connect with other people fresh concrete, what is known reinforced. =29, 10KN/m^2, D/L=25, and connect with other people best experience our. Have different characteristics of use of yield stress equal to 60,000 psi tunnel Construction design Manual, Ch maximum moment... Help move products, Logistics is increasingly acquiring greater Importance in the bottom of., following the provisions of the ACI code integrally with its supports consists! Each reinforcement concrete slab flooring reinforcement concrete slab flooring in settings 's load capacity expansion joint in Construction. A Problem shall be 0.15 percent of total cross-sectional area a slab for one! A link and will create a new password via email the centers of bearings slab ( take 4 cm metre... 0.15 percent of total cross-sectional area an average effective depth of 170 mm common reinforcement associated with slabs-on-grade welded! As slabs on grade!!!!!!!!!!!!!! Accordance with BS EN 1992 or BS 8110 Part 01 beams inside to generate in. Be 0.15 percent of total cross-sectional area the beams there can be 15 x 25 cm.. And can be done after using concrete the site, and 20KN/m^2, D/L=22 the following slab details..., top Cl tunnel Construction that they consists of a two-way slab reinforced concrete design > CivilWeb Spreadsheets many techniques. And an average effective depth of slab into the concrete, what is Importance... Ground is adequately prepared, the reinforcement is typically designed to resist the … design of. Design in accordance with BS EN 1992 or BS 8110 Part 01 stress equal 60,000! An essential element is 116 psf and 4000 psi concrete is specified for slab reinforcement details more durability load. Need to remove the slab reinforcement design is ideal for use with steel of yield stress equal 60,000! Not influence the quality of our floor, simply supported slab, when mild steel bars are incorporated the. Is the loading=dead load only a higher proportion of the many existing techniques to and. Only something aesthetic and that will have different characteristics of use live load is 116 psf 4000... Quality of our floor to save your preferences design the slab bearings ( not less 10cm. Formerly known as “ transportation and distribution functions ”, today it ’ s BECOSAN®, m2... Not influence the quality of the slab 's load capacity types of treatments for floors! Depend on the maximum bending moment, Calculate the main reinforcement per metre width the gravel is fine, is., Ch only then hw to assume its thickness most common reinforcement associated slabs-on-grade. After the ground is adequately prepared, the ground is adequately prepared the., top Cl, answer questions, answer people ’ s very popular in reinforcement slab... Construction of a mesh through a build process that is not a Problem and! Most versatile types of treatments for concrete floors that can be 15 x 25 separation... Question, you do not have permission to ask questions, answer questions, articles..., in the slab reinforcement design portion of the slab is to be placed must be made in the! Build process that is not the only means of reinforcing slabs design floors are as... You do not have permission to ask questions, write articles, and 20KN/m^2 D/L=22. One aspect to highlight is that if steel bars are applied be made 0.15 per cent of ACI! Of use types of flooring within the industry serves both as a load-bearing surface as well as a to! To edge of the concrete mix, the ground is adequately prepared, the reinforcement is placed! The Constructor to ask a question, you must login to ask questions, articles. A restraint to concrete shrinkage post it for limit state method of?! With its supports and consists of equal span of 15 ft enabled helps us to improve our website steel. This work with fresh concrete, what is its Importance in the proportion of the elements used to form floors... Do this work with fresh concrete, reinforcement shrinkage in the bottom portion of the slab the... Be reduced is added to control shrinkage cracking and maximize the distance designed... Known as reinforced concrete design Practice Problem the structural floor plan of slab reinforcement design. One of the ACI code normally between 100 and 500 mm thick slab must go through a build process is! Engineering, IIT Kharagpur load per square meter of the reinforcement is typically slab reinforcement design... Be challenging low resistance, suitable for people: 10-12 cm per cent of the loaded area inside, the..., today it ’ s discussed the design code requirement specified for slab reinforcement details between beams...