Simply supported slab reinforcement details

Simply supported slab reinforcement details. are poured simultaneously producing a monolithic structure where the portion of the slab at both sides of the beam serves as flanges of the T-Beam. . A composite slab without such bars is considered simply supported even when the steel deck is continuous over several spans. ULS Max bending moment. 0, 4. Bending will take place in the two directions in a dish-like form. The concrete grade of the slab is C32/40. The deck should also be designed to carry 30 units of HB load. 08L from the center support. Copyright 2020 Computers and S The basic value of a simply supported slab is 20. 5m Thickness of wall = 500mm Bearing on wall = 300mm Thickness of slab = 150mm Reinforcement detail of HYSD bars. 5% will be okay. After designing all, all reinforcement drawing should be drawn. All slabs had a rectangular cross-section of 500 mm width by 160 mm depth. The beam is generally designed as simple beam but additional reinforcement provided on top with slab to make it behave like a Tee-beam. Two Way Slab Theory and design of two-way simply supported slab with corners free to lift, no provisions for Torsional reinforcement by Limit State Method including sketches showing reinforcement details (plan and two sections) 10. Feb 22, 2021 · Solid slab bridges are essentially concrete into which internal stresses of the appropriate magnitude and distribution are introduced so that stresses resulting from external loads are counterbalanced to the desired degree. Length between slab is 6. A floor system shown in Figure-10 consists of a 75 mm concrete slab supported by concrete T-beams with a 7. 30+3. e. 25l from the face of the support. Concrete Cover: a layer of protection against environmental factors and corrosion for the concrete reinforcement. com. Design of R. The necessary bars derive from the calculated required reinforcement. Simply supported slab: summary Note In this video reinforcement detailing of a two-way simply supported unrestrained slab as per Indian Standard (IS: 456 and SP 34). In such cases, the span is relatively small and multiple spans are infeasible and/or The most unfavourable shear forces along the sides of a slab (as well as the most unfavourable bending moments) are tabulated in the tables of the book entitled “Applications of Reinforced Concrete” (p46-51 for two-way slabs, p52-59 three- or two-side-supported slabs) of series of books by Apostolos Konstantinidis published in1994. Clause D-2 stipulates that fifty per cent of the tension reinforcement provided at mid-span should extend to the supports. , India, E-mail: shailsin5@gmail. 582 views, 12 likes, 1 loves, 0 comments, 21 shares, Facebook Watch Videos from Greyspace Engineering Services: Simply supported one way slab – reinforcements and construction animation are presented Here are the general steps involved in reinforcement detailing in beams: Determine the loads and load combinations that the beam must support, and the span of the beam. For simply supported one-way solid slabs, Minimum Slab Thickness = l/ 20 . Design an simply supported one –way slab over a transparent span The primary reinforcement can be computed using the flexural formula of the glow. The reinforcement details and the dimensions of the tested specimens are shown from Fig. 9. Abstract In general Reinforced concrete slab type deck are often referred to as culverts and are commonly used In a one-way slab the need for reinforcement appears mainly in the span and along the bending direction. The one-way slab is supported by two beams. Maximum spacing of main bar is restricted to 3 times effective depth or 300 mm whichever is Question: Problem #1. The first stage of the design is finding the bending moment of the slab panels. Thin concrete slabs are also used for exterior Feb 22, 2022 · The maximum diameter of the reinforcement bars in RCC slab is should not greater than (1/8) of slab thickness as per IS code provision standards. Sep 30, 2016 · Learn about the ETABS 3D finite element based building analysis and design program for the design of reinforced concrete slabs. Dec 16, 2023 · We need to calculate the max. 4. 0 kN/m2 (excluding slab self-weight) and a variable action of 3. 0 m. my. AASHTO LRFD does not prescribe the maximum skew angle for which the simplified design procedures can be applied [ 5 ]. The purpose of design calculation is to compute the required crowd of the core reinforcement. It should be taken according to IS Code I will explain later in numerical below the post. Viewer. Each layer should have area per unit width equal to 75% of mid-span tension reinforcement for adjacent edge of a slab is discontinuous. For example let us consider a building which is having 120mm thickness of slab, for that particular structure we need to take maximum reinforcement bar diameter is (1/8) of 120mm which is 15mm. Beyond that point provide 20% of steel area from required tension-steel as hanger bars. The importance of the theory is more reflected in the analysis of slabs. Figure 4. 2 m on centers. The ends of these beams are free to rotate and have no Nov 1, 2019 · In this research paper an attempt is made to analyze. C. 7. 0, and 5. Whereas, 50% of the reinforcement is curtailed at a distance from the center support for the searing forces. The top mat resists the negative bending moments at the critical sections adjacent to the supports in the column strips and middle strips. Reinforcement Details of Simply Supported Beam and Slab. 0 kN/m 2. Here its clearly explained detailed design of two way slab simply supported corners free to lift, the design is according to limit state design of IS 456-200 How to make the reinforcement detailing for two way simply supported slab as per SP 34 & IS 456 had been discussed step by step. Reinforcement of 6 mm diameter is placed at 75 mm center to center spacing with a cover of 20 mm. They may also be required in the compression zones to increase the We will walk through the detailed design process of a simply supported two-way slab with specific parameters. A two-way slab can be provided in the following ways: Simply supported slabs spanning in two directions; Continuous two-way slabs If the ratio is greater than 2, it is identified as a one-way slab. The span to depth ratio. For a simply supported slab or beam, 100% of reinforcement is given at the mid span of the structure to act as the tension reinforcement Apr 7, 2021 · For comparison between span to depth ration limits in ACI. Provide 60% beyond that up to 0. 15l (≥∅ 45) where l is the effective span. to SMDSC[21]. Simply Supported One Way Slab Load factors D. M d = 54. 2, Fig. Step 10. 35 KB. A simply supported beam of 7 m span carries a uniform ultimate load of 95 kN/m. Simply Supported Reinforced Concrete Beam Analysis and Design (CSA A23. T - Beam When floor slabs and beams. Two Way Slab Design With Reinforcement Details || Slab Design || RCC Design || Civil EngineeringIn this video, I have explained about how to design a simply Aug 17, 2023 · Geometrical details of RC slab used in the experiments conducted by have been chosen for the numerical analysis in the present study. for the simply supported slab. Control of deflections. Beam reinforcement placement commences immediately after the carpenters complete the soffit formwork of the floor. Accordingly, main reinforcement is required in the two directions. 5, Fig. 0 m were considered. May 6, 2022 · Lecture 28RGPV Civil EngineeringRCC 1Structural Design 1Unit 3 Design of SlabsNumerical on Design of simply supported two way slabTorsion Reinforcement is pr Nov 5, 2019 · Slab design is comparatively easy when compared with the design of other elements. sections with specifications. As per the calculation the reinforcement values obtained as It is consisting of 10mm @ 150C/C distance main reinforcement, 8mm dia bars with 260mm C/C Apr 6, 2022 · Subject - Theory of Reinforced Concrete StructuresVideo Name - Design of One Way Slab (Simply Supported) Chapter - Design of Slabs using LSMFaculty - Prof. concrete building detail Bolts – g – 60 – astm – 615 doc House 6x9m – reinforced concrete Foundation and electrical room details Detail of stable drinking fountain. The span of the deck is 12. The BIM software application for structural detailing of reinforced concrete buildings. 0m (centerline of support). Two-way slab As we discussed in previous articles , the ratio of longer to shorter span is less than two and the slab is supported in all the four edges, then the slab is called a two-way slab. 1: Mid-span Details of Tee-Beam. below. ACI 318-14 (8. The slab has to carry a distributed permanent action of 1. One common application is in the construction of bridges, particularly those with relatively short spans. Nominal cover to reinforcement and controlling design consideration, fire or durability (standard Introduction: Detailing is often considered to be the preparation of working drawings showing the size and location of the reinforcement in a concrete structure. The beam dimensions are 200 x 450 mm (b x d) and the longitudinal reinforcement provided are 3H20 and 2H12 for tension and compression respectively. Reinforcements resist tensile forces. This method was provided in the American Concrete Institute (ACI) in 1963 to design two-way slabs carried by steel beams, deep beam, or walls. Dec 30, 2021 · The reinforcement details are calculated for slab are classified in to four stages trial depth and effective span, load on the slab, design of BM and check for depth and Area of reinforcement. Here’s the best way to solve it. Concrete grade and aggregate size (minimum standard 25/30 MPa and 20mm). Life-long integrated education of traditional and software oriented methods. 2. Apart from the primary reinforcement that is placed parallel to the deformation direction, there is also need for The team consists of experienced structural engineers and IT experts, led by Apostolos Konstandinidis. The video details with time Nov 1, 2017 · Table 1 Details of simply supported RC skew slabs tes ted [6] Sl. 5 m span and 1. In this article, a C coding has been done for the design of a simply supported reinforced concrete slab. Design the column if Cantilever beams are supported on one end and the other end projecting beyond the support or wall. - 12 in Wu As 9 ft Sep 8, 2020 · 1. 2 Strength Reduction Factor Flexure 0. This paper reports on the structural optimization of reinforced concrete slabs, presenting the case of a rectangular slab with two clamped adjacent edges and two simply supported edges. 1 Two way simply supported slabs The bending moments M x and M y for a rectangular slabs simply supported on all four edges with corners free to lift or the slabs do not having adequate provisions to prevent lifting of corners are obtained using Mx = αx W l 2 x My = αy W l 2 x Mar 28, 2021 · A simply supported slab is a type of reinforced concrete slab which is commonly used in construction which is supported on primary beams or a supporting walls. Guidelines and recommendations on the economical detailing of two-way reinforced concrete slabs Figure 4. 1. Main bar: The main straight bars known as bottom bars are provided along a longer span of the slab. Deflection is not computed. 60 m fill subjected to stationary overload and vehicular live load. M May 3, 2021 · The office loading has been taken as 7. It Is presumed that the detaller would take this design and detail the slab to normal best practice, e. Figure 3. Use fc' = 3,000 psi and fy = 60,000 psi. - 116 35 +30 210 7569600 info@buildinghow. 12% for HYSD bars and 0. Its deflection mode is mainly through bending. 1 of IS code 456:2000, page 37) So, to satisfy deflection control criteria span to depth ratio should be greater than or equal to 25. Code and Egyptian Code, one-way solid slabs of span 2. 3. 6 k N / m ⋅ l 2 8 = 334. Part 5 - One way and two-way slab design To design the slab, we specify the reinforcement detail according to the span length by either one- Categories Admixtures in concrete Clearly, the detailing of the reinforced concrete members is the key to good design and execution of work at the site. Slabs are supported on Columns and Beams. II,III,IV 02* 6 Draw structural details of the designed beam , simply support a one way slab in A2 size drawing sheet with scale. Jun 1, 2015 · Department, IIST, Indore, M. For both 1. Show the cross section of slab with reinforcement details. Q. 10 For the simply supported one-way slab shown below, determine the required thickness and reinforcing. Jan 31, 2018 · Figure 3. 3k Views. When gravity loads are applied to a composite slab without top continuity bars, cracks form in the concrete above the interior supports, which causes the slab to behave as a series of simply supported slabs. Concrete. ground detail Whereabouts with details Design of a prestressed concrete slab doc Mar 28, 2021 · A continuous spanning slab is designed to undertake plant loading on the first floor . maszura@ump. m. 5 kN/m 2 and knife edge load of 33kN/m . The design of Dec 3, 2023 · Slab Formwork: During construction, concrete slabs are supported and shaped by a temporary framework referred to as slab formwork. 6, Fig. Assume live load of 3 kN/m 2 and a floor load of 1. autocad-dwg. Reinforcement Details of Continuous Beams and Slabs. L. Franklin rodriguez. . One-way slab (simply supported slab) The following describe the way to reinforce a one-way (simply supported) slab. 5m. The diameter of bar generally used in slabs are: 6 mm, 8 mm, 10 mm, 12mm and 16mm. ( From clause 23. 4 DESIGN AND DETAILING OF ONE-WAY SIMPLY SUPPORTED SLABS Design and Detailing of One-way Slab Simply Supported on all Edges If the ratio 2 Short span Long span > x y l l, the design is same as that for simply supported beam of unit width, as the slab bends mainly along the short span Dec 1, 2022 · The test programme included six simply supported slabs. Design load applied to simply supported concrete beam. Accordingly in structural components with curved or angled soffits, or those formed 1’ ” iKith bends or corners, it should be ensured that ; the radial tensile forces due to changes in the , direction of reinforcement are resisted by 1 additional links (see Fig. Aug 8, 2022 · In this video, I have shown reinforcement detailing of a simply supported one-way slab as per Indian Standard (IS: 456 and SP 34). Library. 3⁄4 Detailing involves thecommunication of the engineer’s design to the contractors who build the structure. A slab supported on all sides bends in all the directions so the main reinforcements provided The slab bridges can be divided in to two types:- Simply Supported Slab Bridge: The simplest form of bridge is the single-span slab bridge which is simply supported at its ends. g. 0m centre to centre of bearings. Jul 3, 2023 · Since 8 conducted vertical flexural performance tests on simply supported reinforced concrete slabs with varying spans and examined the failure modes and mechanical behavior of composite beam-slab May 31, 2010 · A Reinforced Concrete Slab is the one of the most important component in a building. Inclined beam reinforcement Beam reinforcement details. 5m X 7. Use fck = 25 N/mm2 and fyk = 500 N/mm2. The loads implemented to the beam lead to reaction forces on the beam's supports. In this article, we will calculate all the necessary steps manually and provide a final reinforcement detail for a two-way slab. Using the yield lines method and the principle of virtual work, a cost function can be formulated and optimized using simulated annealing (SA). 51. Feb 7, 2014 · A short tutorial showing how the main reinforcement in a simply supported slab is designed using EC2. Construction details. Reinforced concrete slab is an important structural element in construction The coefficient method may be the simplest, easiest and the quickest approach for the design of two-way slab supported by edge beam on all slab sides. The yield analysis was proposed by Ingerslev in 1923. Minimum reinforcement is 0. b. Use M25 concrete and Fe415 steel. 3 Eftichidou Str. 80+0. 6 Data Bay Dimension Bay 1. A two-way slab can be provided in the following ways: Simply supported slabs spanning in two directions; Continuous two-way slabs In this video, we explore how to design a simply-supported reinforced concrete slabs. As seen in figure-1 below, for a simply supported beam and slab, 100% reinforcement as per the design is provided as tension reinforcement at the mid span of the beam and slab, and 50% is curtailed at the distance of 0. P. SP : 34 (S&T)-1987 or stirrups. 9, Fig. Reinforced concrete slabs are used in floors, roofs and walls of buildings DESIGN EXAMPLES. com, +917415241200. 17). 5. about X-X axis as shown in the figure below. Feb 4, 2018 · a) Simply supported slab b) Restrained slabs 7. Simply supported beams are fundamental structural elements used in various applications due to their relatively simple design, load-carrying capacity, and the ease with which they can be analyzed. 7, Fig. Design a simply supported slab for a room of size Lx (m) X Ly (m) one end continuous to support a live load of 300 psf. For a simply supported slab or beam, 100% of reinforcement is given at the mid span of the structure to act as the tension reinforcement. The yield line theory is conducted based on the bending moment of the structural element at its collapse state. 4, Fig. 0. Sketch your design. reinforcement details (plan and section) by Limit State Method. Details of the simply supported slab are illustrated in Fig. Fig: RCC Cantilever beam reinforcement details. Assume: wi 180 psf, WsD 20 psf, y. 8, Fig. 40 m and its secondary dimension to 5. 3, Fig. The floor finishes, ceilings and services have been taken as 1. One way slab and two way slabs are much different. The two-way slabs distribute the loads in both directions. Inroduction When the ratio (L/S) is less than 2. Common beam shapes include rectangular, circular, and I-shaped. A reinforced concrete braced column is 250 mm * 500 mm, subjected to 1500 KN plus end moments of 8 0 KN. RCC Slabs whose thickness ranges from 10 to 50 centimetres are most often used for the construction of floors and ceilings. Design the shear reinforcement using vertical links. Download dwg Free - 521. edu. Minimum Slab Thickness. 15 kip/t', f, 60,000 psi, and f 4,000 psi . bending moment and shear force for our governing ULS load and the bending moment due to our quasi-permanent load, before we can design the reinforced concrete beam. 3-14) Simply supported beams consist of one span with one support at each end, one is a pinned support and the other is a roller support. Beam-to-slab flexural stiffness (relative stiffness) ratio (α. 3-14) Simply Supported Reinforced Concrete Beam Analysis and Design (CSA A23. Show the reinforcing details. c. 0 kN/m2. 2 : Detailing of Reinforcement of Cantilever Roof 4. 2. One way spanning slabs. Fig. The deck carries a 100mm depth of surfacing, together with a nominal HA live load udl of 17. The beam that is located beneath the slab acts as the web component and is generally designated as stem. A beam is a structural component that mostly opposes loads implemented sideways to the beam's axis. For one end continuous one-way solid slabs, Minimum Slab Thickness = l /24 . But if only one edge is discontinuous then 37. Determine the size and shape of the beam cross-section, based on the loads and span requirements. Case 2: Simple supported slab (c) Cantilever rectangular slab, (d) Fixed or simply supported circular slab, etc One-way slab means it bends only in one direction and, therefore, reinforcement for bending (i. No. Simply supported slab with 0. the simply supported RC skew slabs subjected to UDL. These bridges typically consist of a series Jan 1, 2018 · As reinforced concrete skew slabs supported on all edges find possible application in buildings wherein the slab is supported by a skew grid of beams due to architectural considerations or space Dec 2, 2023 · One kind of reinforced concrete slab is known as the one way slab. The example regards slab S1 which is 180 mm thick, its primary dimension is equal to 0. This article is the first in a series on recommended reinforcement details for cast-in-place concrete construction. Provide 100% required top steel area (hogging R/F) up to length 0. According to it, the specified thickness values are as follows: a. The video details with tim Example 1: Simply supported One way slab A rectangular reinforced concrete slab is simply-supported on two masonry walls 250 mm thick and 3. f. Longitudinally reinforced slab bridges have the simplest superstructure configuration and the polished appearance. For continuous beams and slabs, you need to The yield line theory of analysis is a factored or ultimate load method of analysis. In the Design Of Reinforced Concrete Structures ii Two-Way Slabs 1 1. Main bars = 12mm ɸ @150 mm c/c (with alternative bars bent up) The team consists of experienced structural engineers and IT experts, led by Apostolos Konstandinidis. The maximum diameter of bar used in slab should not exceed 1/8 of the total thickness of slab. 75 L. 1: Curtailment of tension steel in If the ratio is greater than 2, it is identified as a one-way slab. 10. 0, 3. Download CAD block in DWG. Nonetheless, the coefficient method is not included Dec 19, 2020 · Typical Reinforcement Curtailment in a continuous Beam Reinforcement Details. This form is widely used when the bridge crosses a minor road or small river. Depending on the boundary condition and the properties of the slabs, methods of finding bending moment is expressed in the BS 8110 Part 01 as follows. The main purpose of the slab is to resist bending in a single direction. 2 Design consideration of T and L-beams(No numerical problems) 8. The Reinforcement Detailing Nov 20, 2020 · The technical guides to the detailing and arrangement of beam reinforcements are as follows; (1) Confirm the formwork dimensions and stability. The minimum thickness of the slab to control deflection is given by ACI Code 9. The slab is supported on monolithically casted beam all-around of width 230mm. For continuous beams and slabs, you need to For a simply supported slab or beam, 100% of reinforcement is given at the mid span of the structure to act as the tension reinforcement. 5 kN/m 2. The office loading has been taken as 7. Design a simply supported one-way reinforced concrete floor slab to span 8 ft. Take a concrete of strength 4000 psi and steel of strength 60000 psi. This article will cover a one way spanning slab design example, checking over a reinforcement details. Draw sectional plan and sectional elevation of simply supported one-way slab with the following data: Size of room = 3. Web dimensions, which are determined by negative moments requirements at supports, are b w = 275 mm and d= 500 mm. A second video shows how the shear resistance of the sl showing reinforcement details and ba r bending schedule. The fck = 32 N/mm 2 and fyk = 500 N/mm 2 (yield stress of reinforcement). In simple terms, “one-way” means that the slab is strengthened to support loads that are largely transported in one direction, typically the shorter span. According to supporting conditions Simply supported, fixed, continuous and cantilever beams Based on embedded reinforcement Singly reinforced Jan 28, 2020 · Design a simply supported reinforced concrete deck slab using a unit strip method. 2) In lieu of detailed calculation for deflections, ACI 318 Code gives minimum thickness for two-way slab with beams spanning between supports on all sides in Table 8. 30=4. 1. 75 m apart. for all slab s was ii) Simply Supported Slabs: The detailing of reinforcing bars of simply supported slabs not having adequate provision to resist torsion at corners and to prevent corners from lifting. That is why poor detailing of reinforcement makes the structure undergo cracking, excessive deflection, or even collapse. Use minimum clear cover. main reinforcement) is provided only in that direction. In this specific case the bars provided are Ø10/100. and carry a service load of 175 psf and a service dead load of 25 psf. The materials to be used are grade C25 concrete and grade 500 Aug 30, 2021 · 1. This would usually Include dimensioning and detailing curtailment, laps, U-bars and also undertaking the other checks detailed in Section 3. C slab for a room of clear dimension 4m*5. 9. (Sheet-1) II,III,IV 04* 7 Design of Two Reinforcement Details of Simply Supported Beam and Slab As seen in figure-1 below, for a simply supported beam and slab, 100% reinforcement as per the design is provided as tension reinforcement at the mid span of the beam and slab, and 50% is curtailed at the distance of 0. Retaining wall detail Slab typ. 0, slab is called two-way slab, as shown in the fig. One way slab design example. 5 Draw sketches (not to scale) showing reinforcement details of singly and doubly reinforced beams and one way simply supported slab in longitudinal and cross sectional view. m and 30 KN. We work through a long-form example of treating a slab as a unit-widt May 14, 2021 · The design information that should be provided in the detailing of reinforced concrete slabs include: Layout and section drawings including details of holes and upstands, etc. 4 DESIGN AND DETAILING OF ONE-WAY SIMPLY SUPPORTED SLABS Design and Detailing of One-way Slab Simply Supported on all Edges If the ratio Long span l y Short span l x > 2, the design is same as that for simply supported beam of unit width, as the slab bends mainly along the short Show the cross section of slab with reinforcement details. 5. 2: Slab-Beam Details. Abstract. Two Way Slab Design With Reinforcement Details || Slab Design || RCC Design || Civil EngineeringIn this video, I have explained about how to design a simply Apr 7, 2021 · For comparison between span to depth ration limits in ACI. Simply Supported One Way Slab (Limit State Method) (5 hrs) Analysis and Design of simply supported one way slab including sketching showing reinforcement details (plan and sections) and bar bending schedule. Hence, the reinforcement is provided along shorter and longer sides of the slabs. Jan 29, 2024 · Simply supported slab: summary Note. 90 Shear 0. At this point, it is important to verify that the formwork dimensions have been done Aug 6, 2020 · It is provided in two layer. 1, Fig. May 7, 2021 · AASHTO LRFD allows the design of simply supported solid slab bridges with main longitudinal reinforcement parallel to the direction of the traffic using simplified procedures . It is a structural element of modern buildings. 15% for mild steel bars. 4 k N m. vq fm me wd yu kt vz oo oo ro