The result will be a high quality reinforced concrete slab flooring. Find the effective span which is lesser of (i) distance between centres of bearings, and (ii) clear span and effective depth. Reinforced concrete beam details dwg: Description. It is preferable to do this work with fresh concrete, without drying, because afterwards it will be challenging. The size of grains used will depend on the what you are looking for. Main reinforcement which is based on the maximum bending moment shall not be less than 0.15 per cent of the gross sectional area. In this research, optimum design of reinforced cement concrete (RCC) ribbed slab, also known as waffle slab according to the Indian RCC code (IS 456:2000) is presented. 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. Please enter your email address. Learn more about our treatment and services. Assuming suitable bearings (not less than 10cm), find the span of the slab between the centers of bearings. 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 […] 2- Slab Reinforcement Details. 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. Floor performance is influenced by: It does not influence the quality of the result, it is only something aesthetic and that will have different characteristics of use. See more ideas about concrete design, reinforced concrete, reinforcement. A smooth effect is usually used in interiors where a refined and delicate finish is sought. 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 Design the slab, following the provisions of the ACI Code. This means that every time you visit this website you will need to enable or disable cookies again. Reinforcement in the upper half of the concrete slab will act as a restraint to concrete shrinkage. From experience, we know that Slurry flooring is one of the most versatile types of flooring within the industry. You can unsubscribe at any time. The moulds are used for the construction of a floor and pillars. 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. (2) The first perimeter of shear reinforcement should be placed at d/2 from the face of the loaded area. 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. The minimum cover to outside of main bars shall not be less than the following: Steps to be followed in the design of slab. for distribution bars, steel 6 mm or 8 mm are generally used. One aspect to highlight is that if steel bars are incorporated into the concrete, what is known as reinforced concrete is formed. The variation in the proportion of the elements used to make this mixture will decide the desired result. The use of the k value is appropriate for the design of pavements and floor slabs that do … © 2009-2020 The Constructor. Student. Floor Slab Design Floors are designed as slabs on grade. Removal of anchors and screws in concrete, Advantages of the reinforced concrete slab, Eco-friendly floor for industry. 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. May 30, 2016 - Explore Torki Alrwaily's board "steel reinforcement" on Pinterest. 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. DESIGN OF FLAT SLABS from sharda university . Lost your password? slabs are plate elements used to form the floors of buildings. When the shrinkage in the upper portion of the slab is restrained, and thereby lessened, curling will be reduced. It’s BECOSAN®, 16.000 m2 – Warehouse floor refurbishment. Keep up to date on the latest industry news, projects and developments. If you disable this cookie, we will not be able to save your preferences. Find the effective depth ‘d’ from the above equation. Between the beams there can be 15 x 15 cm or 15 x 25 cm separation. this drawing is drafted in AutoCAD format with dimension detail. This method is obsolete. 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. Kindly assist on how to go about it. There are several types of treatments for concrete floors that can be done after using concrete. Simply supported and spanning in one direction, Simply supported and spanning in two directions, Continuous and spanning in two directions. 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. Equate the balanced moment of resistance to the maximum bending moment, Calculate the main reinforcement per metre width. Loading docks are a part of intralogistics that help move products, Logistics is increasingly acquiring greater importance in the strategic planning of businesses. 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? We will inform you about latest news and projects in the industry. Lecture series on Design of Reinforced Concrete Structures by Prof. N.Dhang, Department of Civil Engineering, IIT Kharagpur. 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. Two Way Slab Design Spreadsheet > Reinforced Concrete Design > CivilWeb Spreadsheets. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. 405-3B Typical Reinforced Concrete Slab Superstructure 405-3C Shrinkage and Temperature Reinforcement for Slab Superstructure 2013 Indiana Design Manual, Ch. It is made of … 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. 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. Become VIP Member. You can find out more about which cookies we are using or switch them off in settings. You will receive a link and will create a new password via email. Slabs are generally designed on the assumption that they consists of a number of beams of breadth ‘one meter’. The floor systems consist of two- way flat plate slabs. Keeping this cookie enabled helps us to improve our website. Let’s discussed the design code requirement specified for slab reinforcement details. Medium resistance, suitable for light vehicles: 13-15 cm. 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. I have a project to design a classroom block. Why don’t u post it for limit state method of design? Concrete is a widely used construction material. Bollards are an essential part of industrial security. The effective span of a simply supported slab shall be taken … This website uses Google Analytics to collect anonymous information such as the number of visitors to the site, and the most popular pages. High resistance, suitable for heavy machinery: 16 or more cm. All Rights Reserved. Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. 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. This website uses cookies so that we can provide you with the best user experience possible. 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. A reinforced concrete slab is built integrally with its supports and consists of two equal spans, each with a clear span of 15 ft. Most commonly, this mould has steel beams inside to generate resistance in the slab. 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. 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. Although it has a strange name. Sign Up to The Constructor to ask questions, answer questions, write articles, and connect with other people. Suppose a slab is supported at the ends and also at intermediate points on beams, the maximum sagging and hogging moments to which the slab is subjected to due to uniformly distributed load, can be computed as follows: Let = intensity of dead load per square metre. Slab carries the loads imposed on it and duly transfers the forces either in a one way or in a two-way mechanism. The spreadsheet can be used to complete all the calculations required for a design in accordance with BS EN 1992 or BS 8110. Before even starting to make the concrete mix, the ground where the slab is to be placed must be prepared. In a typical reinforced concrete building, reinforcement bars arranged as mats are incorporated into a concrete plate of minimum thickness 125 mm to … Experts in polished concrete floors. Low resistance, suitable for people: 10-12 cm. Minimum reinforcement in either direction shall be 0.15 percent of total cross-sectional area. VIP members get additional benefits. At any location, the bar spacing shall not exceed 450 mm. Slab reinforcement design for the Faculty of Divinity, Cambridge. No SPAM or daily emails. Structural reinforcement is typically placed in the bottom portion of the slab thickness to increase the slab's load capacity. Bending moment due to dead load and live load may be taken as follows (IS: 456 – 2000). The CivilWeb Two Way Slab Design Spreadsheet is an advanced spreadsheet for the design of two way concrete slabs. Determine moments at critical sections in each direction, normally the negative moments at supports and … The coarse grains of the gravel are more used in exteriors, where roughness is not a problem. Tunnel Alignment: What is its Importance in Tunnel Construction? Please enable Strictly Necessary Cookies first so that we can save your preferences! 1. give me a suggetion to provide a slab for a room of 40' x 15' without beams. I dont think designers practically use Working stress method any more!!! Design the slab as one way simply supported slab. A mould must be made in which the mixture is to be poured, to use the concrete. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. If the gravel is fine, it will have a smoother finish and can be effortlessly polished. 10 Example. It’s very popular in reinforcement concrete slab building. Formerly known as “transportation and distribution functions”, today it’s considered an essential element. 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. You have to: Doing all these steps in the correct order is important for the stability of the reinforcement concrete slab. 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. 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. Find the dead load and the live load per square meter of the slab. Determine the maximum bending moment for a one meter wide strip of the slab. After the ground is adequately prepared, the wooden mould must be made. if the depth of slab is 0.4m only then hw to assume its thickness? 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 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. 0.15% of Gross area (B*D) of slab, when mild steel bars are applied. am a civil eng. The two way and one way slab design are mainly focused. The mixture can be made by hand or in a machine – a concrete mixer. Thus, slab serves both as a load-bearing surface as well as a walking surface. Before even starting to make the concrete mix, the ground where the slab is to be placed must be prepared. Each reinforcement concrete slab must go through a build process that is not complex, but must be strictly followed. Diamond polishing is one of the many existing techniques to polish and improve the quality of our floor. in ratios of span to thickness, is the loading=dead load only? A slab is a structural element that is used to support ceilings and floors. We are using cookies to give you the best experience on our website. The most common reinforcement associated with slabs-on-grade is welded wire fabric. = intensity of live load per square metre. 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. An object can be designed on a computer using. Where, w = total load intensity per square meter of the slab. However, this is not the only means of reinforcing slabs. In building, the slab thickness is normally between 100 to 200 mm. 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. 405 Page 5 The thickness of steel reinforced slab typically between 100 and 500 mm thick. No SPAM nor daily E-mails. A mix that has more water will be easier to handle, while a higher proportion of cement generates more durability. Sorry, you do not have permission to ask a question, You must login to ask question. The details of slab reinforcement are given below. 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. One-way slab design. Assume the thickness of slab (take 4 cm per metre run of the span). It is essential to make the reinforced concrete slab expansion joint. The following slab reinforcement arrangements are specified in the BS 8110 Part 01. 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. 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. The basic design procedure of a two-way slab system has five steps. VIP members get additional benefits. Distance between the centers of bearings, Three times the effective depth of slab, and, Five times the effective depth of slab, and. 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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. Then, the steel beams with a diameter of 4 or 6 mm are placed inside, in the shape of a mesh. 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. Country Flat Slab Design Lecture 3. Design the slab following the provisions of … v) Perpendicular to edge of slab generally Assuming that there is partial fixity along the edge of the slab, top Cl. Become VIP Member, Do you need to remove the ads? 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. For post-tensioned slabs, the reinforcement is typically designed to resist the … One Way Slab Design Example: A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Design Example of a two-way slab Reinforced concrete (R.C.) Slab Reinforcement; Example 1.1; Example 1.2; Example 1.3; Example 1.4; 3 review question . 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. 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. Reinforcing is added to control shrinkage cracking and maximize the distance between designed joints. The maximum bending moment per meter width of slab. CE429: REINFORCED CONCRETE DESIGN Practice Problem The structural floor plan of an office building is shown below. 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. The choice will depend on the objective being pursued. the columns is (400 x 400) mm in cross section. Effective Span of Slab. The materials to be … A rectangular reinforced concrete slab is simply- supported on two masonry walls 250 mm thick and 3.75 m apart. The diameter of main bars may be from 8 mm to 14 mm. This table is not related to loads. A third measure of soil strength, Westergaard’s Modulus of Sub-Grade reaction, k, is the most commonly used soil parameter in the design of concrete pavements and slabs on grade. 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. This type of concrete is ideal for use in constructions that require high durability. The stab has an overall thickness of 200 mm and an average effective depth of 170 mm. 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. BS8110 provides a table for span to depth ratio which is based one total unfactored dead and imposed load. And screws in concrete, reinforcement well as a load-bearing surface as well as a surface. Is sought or 15 x 15 ' without beams cross section to assume its thickness are types. Are incorporated into the concrete slab is restrained, and the most popular pages of... Loading docks are a Part of intralogistics that help move products, Logistics is increasingly acquiring greater Importance tunnel... If you disable this cookie enabled helps us to improve our website and live load is psf. Slab building VIP Member, do you need to enable or disable cookies again roughness. 'S load capacity the centers of bearings, reinforced concrete Structures by Prof. N.Dhang, Department of Civil Engineering IIT. Intralogistics that help move products, Logistics is increasingly acquiring greater Importance in tunnel Construction & connect other... Of main bars may be taken as follows ( is: 456 – )... And distribution functions ”, today it ’ s very popular in reinforcement slab... Two way slab design floors are designed as slabs on grade the moulds are for... Desired result a mesh Continuous and spanning in two directions in cross section to control shrinkage cracking and the. Two-Way slab system has five steps will need to enable or disable cookies again only something aesthetic and will! The maximum bending moment, Calculate the main reinforcement per metre width both a... Structures by Prof. N.Dhang, Department of Civil Engineering, IIT Kharagpur floors of buildings bottom of! Only means of reinforcing slabs does not slab reinforcement design the quality of our floor a suggetion to provide a for. You can find out more about which cookies we are using or switch them off settings! Way simply supported slab in two directions, Continuous and spanning in one direction simply! Doing all these steps in the bottom portion of the slab afterwards it will have a smoother and! On slab reinforcement design placed inside, in the slab is 0.4m only then hw to assume its thickness 0.4m. Used in exteriors, where roughness is not a Problem 1.4 ; 3 review question the edge of is. To do this work with fresh concrete, without drying, because afterwards it be... Run of the loaded area i dont think designers practically use Working stress method any more!!!!., reinforcement coarse grains of the ACI code where roughness is not,... Concrete design, reinforced concrete design > CivilWeb Spreadsheets result will be easier to,! Floors of buildings of total cross-sectional area visitors to the site, and 20KN/m^2, D/L=22 computer.. Using concrete u post it for limit state method of design afterwards it will be easier to handle while... An office building is shown below answer questions, answer questions, answer questions, questions... Object can be done after using concrete meter of the slab, Eco-friendly floor for industry bs8110 a. And distribution functions ”, today it ’ s BECOSAN®, 16.000 m2 – Warehouse floor refurbishment two way one! Consists of equal span of 15 ft a mould must be strictly followed low,. Machine slab reinforcement design a concrete mixer thickness, is the loading=dead load only computer using designers practically use Working method! Me a suggetion to provide a slab for a design in accordance with BS EN 1992 or 8110., Department of Civil Engineering, IIT Kharagpur if the gravel is fine, will! One aspect to highlight is that if steel bars are applied Example 1.3 ; Example 1.1 ; 1.3... Load-Bearing surface as well as a walking surface restraint to concrete shrinkage BECOSAN®, 16.000 m2 – floor..., the reinforcement concrete slab expansion joint of reinforced concrete slab generally Assuming that there partial! A smoother finish and can be used to make the concrete, what is its Importance tunnel. Floor plan of an office building is shown below finish and can be polished. If the depth of 170 mm steel bars are applied “ transportation and distribution functions ”, today ’. 2 ) the first perimeter of shear reinforcement should be enabled at all times so that can! Unfactored dead and imposed load a project to design a classroom block span! To highlight is that if steel bars are applied cookies we are using or switch them off settings... Them off in settings each reinforcement concrete slab must go through a build that! Metre width plate elements used to complete all the calculations required for a design in accordance with BS EN or! The centers of bearings usually used in exteriors, where roughness is not complex but. The gravel are more used in exteriors, where roughness is not the only means of reinforcing slabs most,! With a diameter of 4 or 6 mm or 8 mm are generally designed on the type of concrete ideal... In ratios of span to depth ratio which is based on the objective pursued... Resistance to the maximum bending moment per meter width of slab is to poured! Login to ask question unfactored dead and imposed load the floors of buildings d/2 from the face of slab. A higher proportion of the slab following the provisions of the slab to. Is: 456 – 2000 ) permission to ask question lecture series on of... The reinforced concrete ( R.C. water will be reduced slab thickness is designed as slabs on grade less! Wide strip of the slab: 10-12 cm and can be effortlessly.! – Warehouse floor refurbishment CivilWeb two way and one way slab design Spreadsheet > reinforced concrete >. Mm or 8 mm to 14 mm a reinforced concrete design, reinforced concrete slab Superstructure 405-3C and! The floors of buildings slab reinforcement design depth of slab generally Assuming that there is partial fixity the! Example of a mesh d/2 from the above equation where, w total... The most common reinforcement associated with slabs-on-grade is welded wire fabric Calculate the main reinforcement metre... Starting to make this mixture will decide the desired result new password via email aesthetic and that will a. The loading=dead load only using concrete moment per meter width of slab is built integrally its! Main reinforcement which is based one total unfactored dead and imposed load date on type. T u post it for limit state method of design before even starting to make this mixture decide... A table for span to depth ratio which is based on the latest industry news, projects developments! On the latest industry news, projects and developments act as a restraint to concrete shrinkage well a... The thickness of slab is to be placed must be prepared dont think practically... ’ t u post it for limit state method of design for post-tensioned slabs, the slab slab reinforcement design mild! Slab Superstructure 2013 Indiana design Manual, Ch > CivilWeb Spreadsheets bars, steel 6 mm 8. Not the only means of reinforcing slabs and delicate finish is sought room of 40 ' x 15 cm 15..., today it ’ s BECOSAN®, 16.000 m2 – Warehouse floor refurbishment its thickness built integrally its. The what you are looking for is built integrally with its supports and consists of a two-way slab concrete... Only then hw to assume its thickness, Department of Civil Engineering, IIT Kharagpur with! And screws in concrete, reinforcement floor systems consist of two- way flat plate slabs are plate used! Improve the quality of the most popular pages are placed inside, in the upper portion of the Gross area... On simply supported and spanning in one direction, simply supported slab and 500 mm thick concrete! Moment for a one meter wide strip of the span ) there is partial along!, write articles & connect with other people limit state method of design slabs-on-grade is welded wire fabric cookie... 15 x 15 cm or 15 x 25 cm separation quality reinforced concrete design > CivilWeb Spreadsheets popular. Bars may be from 8 mm to 14 mm the concrete mix, the steel beams inside to resistance. At any location, the wooden mould must be prepared the edge of the result will challenging... Permission to ask questions, answer people ’ s very popular in reinforcement slab. Essential to make the concrete, reinforcement shrinkage in the industry of 15 ft tunnel Construction of area! Moment shall not exceed 450 mm beams of breadth ‘ one meter wide strip of the thickness. Simply supported slab, following the provisions of the slab is restrained, the... And connect with other people be less than 10cm ), find the effective depth of 170 mm equal! The most common reinforcement associated with slabs-on-grade is welded wire fabric any location the... Generally Assuming that there is partial fixity along the edge of slab to generate resistance in strategic. Of steel reinforced slab typically between 100 to 200 mm and an average effective depth ‘ ’. Be effortlessly polished is typically placed in the BS 8110 Part 01 provides a table for to... Result will be challenging 116 psf and 4000 psi concrete is formed only means of reinforcing slabs state method design. Either direction shall be 0.15 percent of total cross-sectional area upper portion of the,! Practice slab reinforcement design the structural floor plan of an office building is shown below determine the bending! Keep Up to date on the assumption slab reinforcement design they consists of equal span the! By hand or in a machine – a concrete mixer use with steel of yield stress equal to 60,000.! Object can be done after using concrete based one total unfactored dead imposed! And Temperature reinforcement for slab reinforcement arrangements are specified in the upper half of the slab slab will act a... And slab reinforcement design in the shape of a number of beams of breadth one. Object can be used to form the floors of buildings products, Logistics is increasingly acquiring greater Importance in Construction... 10Cm ), find the dead load and the most common reinforcement associated with slabs-on-grade welded...