flat slab design calculation example

Concrete slabs are commonly divided into the following types: • Beamless slabs Beamless slabs are supported only on columns and are applied mostly in large industrial and public buildings. Found inside – Page 61EXAMPLE OF THE DESIGN OF A FLAT SLAB 28 cm Spans : Loads : 5:33 x 5.33 m superimposed load 4 cm surfacing dead weight Thickness : = 2 ... Different types of shear reinforcement used at column heads Flat slabs may have drop panels at columns and columns may have capitals. [�Q stream Found inside – Page 335... just as for the flat soffit slab. EXAMPLE 9.2 Composite Beam Design SOLUTION GOAL: Calculate the design moment and allowable moment and determine the ... Design Loads for Residential Buildings . 1 0 obj It is estimated that a concrete slab lasts for about 30 to 100 years if it is built with good grade of concrete and steel. 3 0 obj Log in to TheConstructor to ask questions, answer people’s questions, write articles & connect with other people. The depth of all slabs is based on deflection control (EC2 7.4). Column Height = 3.5m (c/c). Design Calculation for Slab. The minimum thickness can be determined by many factors: • Shear strength of beamless slabs (usually a controlling factor); slab must be thick enough to provide adequate shear strength Found inside – Page 183For example the roof slab may be 200mm thick for a flat slab roof whereas the slab of an alternative design with beams and slab might well be 125mm thick. When you join you get additional benefits. - Flat Slab resting directly on columns - Flat Slab with drop panels - Fla. REINFORCED FLAT SLAB DESIGN EXCEL SHEET. The procedure is consistent with the Navy's current blast-resistant design manual NAVFAC P-397 and is based on an equivalent single-degree-of-freedom (SDOF) model of a flat slab. 7 0 obj Found inside – Page viiB.2 Summary of EC2 rules 126 Appendix C: Example calculations 128 C.1 Example ... 142 C.2.2 Calculation of the lap length 142 C.3 Example 3: Flat slab 144 ... Breadth of the web, b w = 200 mm L 1 =1.90m L 2 Found inside – Page 272Reference Step Calculations Final moments for design will be MA I 275 + 40 I ... x 500 mm with slab thickness of 150 mm of a flat slab if the analysis shows ... 4.3 Example for data input 49 4.4 Example of calculations 50 4.5 Example of detailing 51 4.6 Properties of slab 53 4.7 Analysis of action 53 4.8 Calculation of Area of reinforcement, As 54 4.9 Selection for area of reinforcement provided, ASprov 55 4.10 Shear, deflection and crack checking 56 4.11 Design result 57 4.12 Slab detailing 57 9 0 obj Without Beams, Flat Plates and Flat Slabs Tests of flat plate structures indicate that in most practical cases, the capacity is governed by shear. Although Nichols analysis is correct, it was accepted as being correct in the mid 1920's and it was not until 1971 that the ACI code fully recognized it and required flat slabs to be designed for 100% of moments predicted from statics. The plan used for gravity analysis of a building is similar to slab panels also. Direct Design method : The following limitations apply to the slab system. Found insideDoctoral Thesis / Dissertation from the year 2013 in the subject Engineering - Civil Engineering, grade: B, , course: Master of technology - Structural Dynamics, language: English, abstract: Flat-Slab building is very popular from the ... Found inside – Page 163Design of the flat slab (ULS) H4.1. Design principle The elastic the internal statie calculation method forces. (in Initial of the general, values theory an ... Found inside – Page iv... flat slab Torsion Example 4.3: flexure, shear and torsion Summary of EC2 detailing provisions Beams - design for seismic actions Example 4.4: beam ... 2 0 obj The floor slabs are at 4.50 m vertical centres. Found inside – Page 668Calculate shear reinforcement: φV s = (Vu − φV c) = 195 − 156.3 = 38.7K φ = 0.75 ... Example 17.11 Flat-Slab Floor System Using the direct design method, ... Your email address will not be published. Design calculation Design of one way slab Slab S1 Span of One way slab L = 2m Section provided D = 130 mm d = 105 mm Loads on slab Self weight of slab = 3.25 Kn/m Floor finish = 2 Kn/m Filling load = 3.5 Kn/m Wall load = 2 Kn/m Live load = 2 Kn/m Total U.D.L = 12.75 Kn/m Bending Moment B.M , W*L2/8 = 6.375 kn-m Ultimate Moment Mu = 1.50*B.M 9.5625 kn-m Charecteristic Strength of concrete (fu . Flat Slab Design Spreadsheet Download Continuous Beams Design Spreadsheet Download Post Tensioned Analysis & Design Spreadsheet Download . <> endobj Your email address will not be published. Found inside – Page 225Design theory and examples B.S. Choo, T.J. MacGinley ... 8.19 8.7 FLAT SLABS 8.7.1 Definition and construction The flat slab is defined in BS 8110 : Part 1 ... . 1. Design Example. Found inside – Page 10-1One will use the conventional method for calculating loads, and the other will ... Following the example types, the load paths described will be flat slab ... αx, αyare moment coefficients, The effective PI then is: PIo=equivalent PI x C5 x Co Where: C 5 is the slope correction coefficient Co is the consolidation correction coefficient As an example: assume - Equivalent (or weighted) PI = 30 10% ground slope C5 (Fig. A church building has a square grid of 7.5m x 7.5m of waffle slab, and is to support an imposed load of 5 kN/m 2, design an interior panel of the waffle slab, and a supporting beam. Bridge Slab Design (1.0)Civil Engineering (File Repository) Created on 10 October 2015 56. Found inside – Page 383These two temperature calculations are then averaged to determine the range of mean concrete temperatures if the slab is exposed to water on the upstream ... Found insideEXAMPLE 12.4 Determine the tendons required in the 220 mm thick flat slab shown in Figure 12.17. The live load on the slab is 3.0 kPa and the dead load is ... Figure-1: Column and Middle Strip in Short Direction of the Panel, Figure-2: Column and Middle Strips in Long Direction of the Panel, Figure-3: Column and middle strip in both direction of the slab with necessary parameters for calculating total static moment, Table-1: Factors applied to static moment for positive and negative moments, Figure-4: Distribution of total static moment to critical sections in interior and end spans, Figure-5: Portion of slabs to be included for the moment of inertia calculation, edge beam (left side) & internal beam (right side), Figure-6: Dimensions of internal and external slab for a moment of inertia calculations, Figure-7: Two possible subdivisions of L-section in rectangles for torsion constant C, Table-2: Column strip moment, percent of a total moment at the critical section. A flat slab may be solid slab or may have recesses formed on the soffit so that the sof fit comprises a series of ribs in two directions. Save Save 13-Design of Flat Slab-slab With Drop Panel For Later. stream Flat slab structures I. endobj A modelling alternative avoiding singularities at the supports is described in Section 2.3. Page 3 Example — Seismic Analysis and Design of a Six Storey Building Problem Statement: A six storey building for a commercial complex has plan dimensions as shown in Figure 1. In other words, the lane load is neglected for all culvert top slabs. Design a cantilever slab of 1.5 m span to carry a super imposed load 2kN/m2 using m20 grade concrete and fe 415 grade steel? 61. endobj Select a country…Åland IslandsAfghanistanAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelauBelgiumBelizeBeninBermudaBhutanBoliviaBonaire, Saint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBritish Virgin IslandsBruneiBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongo (Brazzaville)Congo (Kinshasa)Cook IslandsCosta RicaCroatiaCubaCuraÇaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland IslandsFaroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and McDonald IslandsHondurasHong KongHungaryIcelandIndiaIndonesiaIranIraqIsle of ManIsraelItalyIvory CoastJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKuwaitKyrgyzstanLaosLatviaLebanonLesothoLiberiaLibyaLiechtensteinLithuaniaLuxembourgMacao S.A.R., ChinaMacedoniaMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldovaMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNetherlands AntillesNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorth KoreaNorwayOmanPakistanPalestinian TerritoryPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarRepublic of IrelandReunionRomaniaRussiaRwandaSão Tomé and PríncipeSaint BarthélemySaint HelenaSaint Kitts and NevisSaint LuciaSaint Martin (Dutch part)Saint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSan MarinoSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia/Sandwich IslandsSouth KoreaSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyriaTaiwanTajikistanTanzaniaThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited Kingdom (UK)United States (US)UruguayUzbekistanVanuatuVaticanVenezuelaVietnamWallis and FutunaWestern SaharaWestern SamoaYemenZambiaZimbabwe, By registering, you agree to the Terms of Service and Privacy Policy .*. ACI Provisions on P/T Slab Design • Minimum Average Pre-compression 0.85MPa • Maximum Spacing of Tendons in any one direction shall not exceed lesser of 8 Times Thickness of Slab or 1.5m • Maximum Permissible Tensile Stress limit is 0.5 x (f c')0.5 ( for fcu = 50MPa f t = 3.16MPa) In this example, the calculating value of the effective depth d v is equal to the effective depth d minus the concrete cover c on the bottom surface of the slab. you may prefer to gather the relevant data and produce a calculation and design layout yourself using the LinkStudPSR on-line design software (available later in 2010 . 143. 2.1.1. Flat slab system is an important division of concrete floor system. With some limitations, reinforcement for slabs can be sized using the Subgrade Drag Theory in order to increase the spacing of control or construction joints. 7. It is several inches thick and it rests on beams and columns. The slab is designed based on the forces developed within this width. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. It is several inches thick and it rests on beams and columns. In each direction, successive span lengths must not differ by more than one-third of the largest span length. x���Mk1���� D����;5)�a����Ʋ18������N�{�� Concrete is C30/37. Found inside – Page 329FLAT SLAB DESIGN EXAMPLE BY THE EMPIRICAL METHOD The same industrial building ... EXAMPLE 7-3 ( Calculation Sheets 1 Through 6 ) Given the building floor ... DESIGN OF FLAT SLAB . No one gives a personal design sheet because of. <> <>>> For 1m slab width, • Moment, Shear Force, One-way Continuous slab • For continuous slab, moment and shear force can be obtained from Table 3.12: BS 8110 if the following conditions applied. <> Floor Finish = 1 kN/m2 , 204 30 174 . Design Two way slab. If there are fewer panels, the interior negative moments tend to be too small. 10 0 obj Base Plate Design Example Download Pile Cap Design Calculation Download Core Wall Design Spreadsheets to Eurocode 2 (EN 1992-1: 2004) Download Found inside – Page 11-1122DESIGN FROM LOAD TABLES The following example will illustrate use of the tables. Example 1. Select a design of waffle flat slab floor for 30 ft. square ... Section Civil & Geotechnical Engineering 1 Calc. Step by Step calculation and explanation of design procedure of flat slab without drop and without column head.#Technicalcivil ( Click for more videos)Must. INTRODUCTION A slab is a structural element that is used to support ceilings and floors. Analysis of flat slab with equivalent frame method using software SAFE. Design the exterior panel of a flat slab of size 6 m ´ 6 m with suitable drop to support a live load of 5 kN/m2 . Lost your password? endobj Download now. ETABS is an engineering software product that caters to multi-story building analysis and design. Modeling tools and templates, code-based load prescriptions, analysis methods and solution techniques, all coordinate with the grid-like geometry unique to this class of structure. What are the Architectural Factors Affecting the Choice of Long-Span ... Types of Foundation for Buildings and their Uses [PDF], Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results, Methods of Rainwater Harvesting [PDF]: Components, Transport, and Storage, 16 Types of Heavy Equipment Used in Construction, Calculate Quantities of Materials for Concrete -Cement, Sand, Aggregates, Façade Lighting Solutions For Building Structures, Natural Stone Flooring: Properties, Benefits & Drawbacks, Alligator Cracking in Asphalt Pavement: Causes and Control, Chezy's and Manning's Formula in Open Channel Flow. Found inside – Page 162Area Calculations to Determine Order Quantity A broken window pane needs to be ... A flat concrete slab for an industrial structure has the following ... Found inside – Page 210QUESTION 1 Derive the expression for the equivalent load wy' given by equation 11.4. QUESTION 2 (a) Use the information given in example 1 to design slab ... and TxDOT LRFD Bridge Design Manual 8" Slab with std. <> Design of typical Floor Slab: Flat slabs are more and more used nowadays, given their structural, architectural and MEP benefits. Given Found inside – Page 20Determine concrete capacity in diagonal tension from equation 4-23 using the ... be added along the wall in lieu of a change in flat slab cross section . CE 403, Fall 2015 Slab Design Example 4 / 5 (ACI 318‐11 Referenced) Calculations for Column 2 provided below. Download Slabs design spreadsheet, flat slab design sheet, beams design spreadsheet, shear and torsion design sheet, footing design spreadsheet and many more at free of cost. <> For wind, the analysis of . for example, if the support has a large minimum width compared to the slab thickness or the span length. I have given an example for the calculation of the quantity steel rod in slab below. Note: It is NOT suggested that it should be standard practice to mesh 2-way slabs, for slabs that are not needed to participate in the lateral load analysis it is better not to mesh in 3D, however: - you may choose to mesh them to cater for the possibility of un-braced flat slab design. load analysis of orthogonal frames and is applicable to flat plates, flat slabs, and slabs with beams. Design of Slab (Examples and Tutorials) by Sharifah Maszura Syed Mohsin Example 2: Continuous one way slab Figure 1 shows a clear area of 12 m x 8.5 m for a hall construction in a school. a) Interior panel b) Exterior panel Various components of flat slab: i) Without drop and head ii) With drop and without head iii) With drop and head Column strip : It is the design strip having a width of l 2 /4, where l 2 is the span transverse to l 1. l 2-longer span, moment is considered along the span l1 in flat slabs and post-tensioned slabs, at slab to shearwall junctions, beam to col- . Required fields are marked *. 16 0 obj Whereas in one-way slab the reinforcement is provided in one direction as it carries load in one direction. Found inside – Page 157The analysis and design of regular flat slab by DDM is done in this chapter. ... EXAMPLE 11.1 (Preliminary planning of flat slab rafts with column capital ... A slab is a structural element that is used to support ceilings and floors. [ 12 0 R] by Dr. C. Sachpazis Date 18/01/2014 Chk'd by Date App'd by 1 FLAT SLAB DESIGN TO BS8110:PART 1:1997 Slab geometry Span of slab in x-direction; Span x = 7200 mm Span of slab in y-direction; Span y = 7200 mm Deflections of flat slabs 10. Found inside – Page 6-18SLAB FORM EXAMPLE Design forms to support a flat slab floor 8 in. thick of normal ... plywood sheathing is to be used, determine its maximum allowable span, ... Properties of flat slab. 9'-0" Beam Spacing, 3'-0" Overhang Deck Design (Traditional) [9.6.1] Use approximate elastic methods in [4.6.2.1] The slab is designed based on the forces developed within this width. 2. Flat Slab Design PDF 2. SLAB SPAN DESIGN EXAMPLE . Design Example #2 Design by DDM flat plate supported on columns 500 mm square, for a Live Load = 4 kN/m2, Floor Finish = 1 kN/m2 use M25 and Fe415. Considering M20 grade of concrete and Fe 500 steel of diameter of 10 mm If this modelling alternative is used, the maximum moments obtained in the slab should be used for design. endobj 9) = 1.2 PIo = 30 x 1.1 x 1.2 = 39.6 Use an Effective Plasticity Index of 40 for design It is several inches thick and it rests on beams and columns. Found inside – Page xiiDesign. of. slabs. 261. 12.1 Introduction 261 12.2 Typical beam and slab ... of analysis of flat slabs 279 12.7 Example of the design of flat slab 283 12.8 ... Mx and My are moments on strips of unit width spanning lx and ly respectively, SAFE is ideal for modeling foundations, basemats, and footings. <> Found inside – Page 163Design of the flat slab ( ULS ) H4.1 . Design principle The static method of the theory of plasticity is chosen to determine the internal forces . Found inside – Page 53... which is a feature of flat slab design.3 Despite the fact that it is a basic item of calculation in this type of design, the engineers did not consider ... Design is defined as the decision . Blast design 2. <> 13 0 obj A B Bb C 4.0 4.0 4.0 6.0 D 1 E 200 x 200 hole 8.0 2 9.6 300 mm flat slabs 8.0 All columns 400 mm sq. Choose design method (direct design method in this case), Calculate positive and negative moments in the slab, Specify portion of moments to the beams, if beams are present, Compute reinforcements for moments that found in two previous points. The slab is supported on beams of size 225 x 500 mm spaced at 4.0 m centers. Self-weight of the slab = 3.25 kN/m2 Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. In the general case, these are calculated from the analysis of a design strip, using the Equivalent Frame Method, or Finite Elements. Flat Plate Slabs •Under unbalanced loads, moments and shears are induced in the slab. x��T�n�@�[�?��L$�y�!EY��Q*EJR�.�.\b�%�P{hտ�Rb�#��8�9 �g��?M������~��8�BJ�B*9͡)����q$`���y"�4ͯ��%���i� �2%D�p���Evv���;g�'آ�4gi��鱄`=���y0������� ���L�8ƒ �p�֚ ��_,�S�ׇ8z#�T*RSi��O ��X��?f��U��jM���s�#?�qGJj���G��^�N=�)A�k�*U����̓�}۩��. <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The design shear force can be reduced to account for the loads applied inside the outer perimeter. A civil engineer must know all the aspects regarding the flat floor system. INTRODUCTION A slab is a structural element that is used to support ceilings and floors. Found inside – Page 200Figure 8.17 Flat slab example ExAMPLE 8.7 Design of a flat slab Design a flat ... the mean depth of the two layers in calculating the reinforcement areas. For flat slabs, punching may also govern. under-design in their favorite slab design systems (which were many at that time). The scope of work will be as below. It is estimated that a concrete slab lasts for about 30 to 100 years if it is built with good . Join now! reinf. Determination of bending moment and shear force. 5 0 obj Hence Safe. For the flat slab system of size 6 m ´ 6 m provide suitable drop and fix up overall . For lower loads they can have constant thickness and are called flat slabs or flat plates, see Figure 1.2a. �Ш��ùp[��ڑK4�DE�ȭSPYB�#���/��Y� >����g�j�GP26SJq��*�G��2�d�:�~հn���ٜ�2�*H��]�I��w�}̳�(�����p�����;�c��b8�f�3�勛���=�":;�*mC�.C[n:��bx(��-��Z�z�o��Ϸ�;B�0��3��K�?�G���'����Ж�مB1�V��]�*�1g�:4��5a�s����vo��j��[�lQ֏�Rx�����{���CX��;b�H�b�P/�P�*��&�_�q��SU��x~aD�������ث"�8�d�7���D2 �d�f�6 �,�. 14 0 obj The following sections outline the solution per DDM, EFM, and spSlab software respectively. Call 800-449-5033 today. Cz-)���U��_�����m$ vI=Wu�1�o���L����t��+�ONB�����i�6|�o|��SӴR*E˨���:}�Mi�e��e�vŠ�W�-=e[��'Q�zEK+�}f�p�*B�Ig��m� f�s^d��;Йpt�3Ēǵ�׎��h[�]*�1��0��0��8�������m*�VSm���}�P�k��0h)�m�4%[�I���^sRgثپ�0`��vx�ݐ�r����|���rV�\�yy4�K�̂jQ���^�nKm]��\�@|_��o� m5r[�Ԗ��Z����c��r�Ղ�X�B\Rn�}dR�F� [dO�j� /Ӡ�����s��+����@�!C^�������:.�v-��!a|3a֥B%!���zo�֘�?�� What must be the maximum dry density of Granular Sub Base & Wet Mix Macadam used ... What is the Safe Bearing Capacity values for Different Soils? (long narrow slabs). 8 0 obj Live Load = 2 kN/m2 Loading scheemes 9. Basic . A 2 hour fire rating is required. This Reinforced Concrete Design Spreadsheet Contains: - Calculation . endobj 100% (2) 100% found this document useful (2 votes) 2K views 15 pages. Analysis of flat sAnalysis of flat sllab..ab.. DESIGN FOR BENDING EDGE PANELS • apportionment of moment exactly the same as internal columns • max. Of course, this comes with a list of design particularities - negligible in typical framing structures (such as punching shear) - that the structural engineer must address in order to achieve safeness and performance.

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