What are Bearing Capacity Values of Different Types of Soil? Unified Building Code (UBC) specified minimum thickness of ribbed slab to be 1/12 distance between ribs or 51mm. The type of footings/slab supported the soils. © 2009-2020 The Constructor. The minimum thickness of raft foundation is 300mm. Sorry, you do not have permission to ask a question, You must login to ask question. 3 0 obj endobj VIP members get additional benefits. Design process includes proper assumption of structural element sizes and then check […] If proper structural dimension is not assumed, then the design would be time consuming and required considerable effort since substantial trials will be involved till satisfactory dimensions are specified. Minimum thickness of concrete slab, beam, column, foundation and other structural members is selected to meet the design requirements as per standard codes. Guidelines for Construction of Concrete Footpath Slabs Dr. Sujeeva Setunge, Prof. Mike Xie School of Civil and Chemical Engineering, RMIT University 1. Minimum thicknesses are set for standard concrete construction, but calculations are also based on the bearing capacity of the soil, and the heaviest concentrated load the concrete will carry. Table 1 minimum thickness of one-way solid slab unless deflections are calculated. UBC recommends minimum thickness of Concrete floor slabs supported directly on the ground to be 89mm, whereas BCGBC4010A – Apply structural principles to residential low-rise constructions determined minimum thickness to be 100mm. Lost your password? Become VIP Member, Get More Features, Sign Up Now. The minimum thickness of a slab is not less than 4 inch according to the standard. 1 0 obj << /Type /Page /Parent 713 0 R /Resources << /ColorSpace << /CS2 722 0 R /CS3 725 0 R >> /ExtGState << /GS2 747 0 R /GS3 749 0 R >> /Font << /C2_1 736 0 R /TT3 739 0 R /TT4 721 0 R /TT5 723 0 R >> /ProcSet [ /PDF /Text ] >> /Contents 3 0 R /Annots [ 2 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 /StructParents 1 >> endobj 2 0 obj << /Dest [ 1 0 R /XYZ 96 95 null ] /Type /Annot /Subtype /Link /Rect [ 212 349 218 359 ] /C [ 0 0 0 ] /Border [ 0 0 0 ] /H /O >> endobj 3 0 obj << /Filter /FlateDecode /Length 4 0 R >> stream QF� @2�� �� T, Minimum thickness of concrete structural elements based on ACI 318-14, IRC 2009, IS 456 2000, and UBC 1997 is presented. What are the properties of good building stones? The same value is recommended by International Residential Code (IRC 2009) for foundation wall. �Rô�w ��6k� Minimum Thickness of Other Concrete Members, REQUIREMENTS OF CONCRETING IN SPECIAL CASES, Benefits of Using Steel Fibers in Concrete. %���� Sign Up to The Constructor to ask questions, answer questions, write articles, and connect with other people. <>>> One cubic meter of…, Reinforced Concrete Deep Beam: Definition: It is simply a member…, Standard dimensions of a ventilator in Residential Building: Ventilator moves…, Type of steel bar used in reinforced concrete: TOR Steel-…, Members not supporting or attached to partitions or other construction likely to be damaged by large deflections, Levelling concrete below liquid retaining structures, Levelling concrete for other RCC foundations, Underground pit / reservoir (below ground water table) walls and slab, Underground pit (above water table) walls and slab. The relevant contents of these are outlined below. <> ENGINEERS AUSTRALIA SYDNEY DIVISION 28 August 2012 Detailing of Reinforcement in Concrete Structures R.I. Gilbert. The depth of beam can also be estimated based on span/depth ratio. Minimum Thickness of Concrete Slab, Beam, Column, Foundation, Slab thickness with embedded conduits and pipes, 1.3 Minimum thickness of Slab on the ground, 4.2 Exterior basement wall and Foundation wall, 6. ¾Detailing involves thecommunication of the engineer’s design to the contractors who build the structure. ACI 318-14 provides suggested minimum thickness for non-prestressed beams, as provided in Table 2, unless deflections are calculated. The AS2870-2011 Residential Slabs and Footings Standard sets out a list of standard slab designs correlating to foundation soil types. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 841.92] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Table 4: minimum thickness for other structural elements. Become VIP Member. �(����M%77c���?��/�r��o��߱\�X-o^�^{aA+���P�Bb��i�X�RB}R'�&&i� 5��� 2 0 obj 3 Pour concrete slab. When the load will be applied to the edges of the slab, the perimeter is thickened, or a grade beam is used to support the edge. ¾Detailingis often considered to be the preparation of working drawings showing the size and location of the reinforcement in a concrete structure. IS 456 2000 provides span to depth ratio to control deflection of beam as provided in Table 3. The minimum thickness of drop panels shall be quarter of slab thickness beyond the drop. The minimum thickness for plain concrete structural footing is suggested by ACI 318-14 and set as 200mm, and the same value is suggested by UBC. Depending on the thickness of the slab, the potential for curling is reduced by decreasing 3.2 Topping slab is poured on to existing concrete surface and screeded to specifications. 3.1 Existing concrete surface is prepared for topping slab with bonded topping or separation material according to specifications. 4 Cure and seal concrete. <> �`��X䒗y!�5ᅦcxu %��J#p��ͫ��lt�v� �$ˢ��[����A� O�ы�r�O�Q����~2X�A�.��x�Xĉ��q��|{��@������|�6@��� uq��C�r���`)�ԛ�1��x��$Ik�n3��K�2O 4 0 obj Notes: Values given shall be used directly for members with normal weight concrete and Grade 420 reinforcement. Table 3: Span to depth ratio based on the span and type of beams, IS 456 2000, Fig.4: Reinforced concrete beam thickness, h. Dimensions of columns is based on the requirements of the design and several shapes can be selected for the columns such as square, rectangular, trapezoidal, cylinders, and others. For other conditions, the values shall be modified as follows: a) For lightweight concrete having equilibrium density (wc) in the range of 1440 to 1840 kg/m3, the values shall be multiplied by (1.65 – 0.0003wc) but not less than 1.09. b) For fy other than 420 MPa, the values shall be multiplied by (0.4 + fy/700). Quantity of Cement and Sand Calculation in Mortar, Methods of Rainwater Harvesting [PDF]: Components, Transport, and Storage, Preparation of Bar Bending Schedule (BBS) and Its Advantages, World's Longest Immersed Road/Rail Tunnel Takes Shape. That is why majority of codes provide minimum dimensions and specifically thicknesses for almost all structural elements. Canadian Standard Association CSA provides similar table except for one end continuous which is l/18. VIP members get additional benefits. Table 2 minimum thickness of non-prestressed beams unless deflections are calculated. You will receive a link and will create a new password via email. The minimum depth for footing on pile is recommended to be 300mm. %PDF-1.5 UBC recommended minimum thickness of slabs with embedded conduits and pipes to be 25mm greater than total overall depth of conduits or pipes. Minimum thickness of a slab is completely dependent upon the types of slab, may be One way or Two way slab, Span of slab, Design load upon the slab. x���n��݀����E4�΢0�l��4ic�E�Y�jlIՒ���=?g�_�`g�\�n{z���I.�(a1��8����Q*�HXGI�f��'g��ӻ:g/W����7��b�[̧����b�����[���z������>�}z�XNw��R��vz͙`����GrV&Q�d�U�v ���U�P XQ�6w����rz�q����_OO^]k���+w� �x�fxX�&I�&\D��=��= Country* UBC specified minimum thickness of exterior basement wall and foundation wall to be 191mm. It shall be known that plain structural footing is not suitable to be used for the top of piles. Design process includes proper assumption of structural element sizes and then check the suggested dimensions to make sure that it meets the requirements of the design. UBC recommends minimum thickness of bearing wall to 1/25 supported height or length whichever is shorter or not less than 102mm. Please enter your email address. • Panel sizes should not be greater than 30 times the slab thickness or greater than 4,5metres square, whichever is the lesser. This code provides designers with the most economical slabs/footing standards based on a number of criteria including both cost to the owner, and cost to the community. The minimum depth for footing on soil is advised to be 150mm. All Rights Reserved. sometimes drop panels used at top of columns to improve shear strength of slabs. ���GMH!�/�� �����^�b\� ���. endobj 4.1 Following setting, curing agents and curing techniques are applied to concrete according to specifications. How to calculate the quantity of water for a given concrete mix.? How to Reuse Pile Foundation Efficiently? What Software are used to Estimate Project Time and Quantity in Construction? ACI 318-14 specify that, conduits and pipes shall not be larger in outside dimension than 1/3 the overall thickness of slab, wall, or beam in which they are embedded. 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 .*.