Per PCA "Slab Thickness Design for Industrial Concrete Floors on Grade" - Figure 7b, page 10 Instructions for Use of Figure 7b: 1. However, it also depends on loading on the slabs. All Rights Reserved. Answer (1 of 8): To determine the thickness you need to figure out what kind of load you are going to put on the slab and if the load is concentrated or spread out across the slab. Maximum Slab Thickness = (Length of Clear Span in long direction /36)*(0.8+ Yield strength of reinforcing steel /200000) h = (l n /36)*(0.8+ f y /200000) This formula uses 3 Variables Variables Used Maximum Slab Thickness - (Measured in Meter) - Maximum Slab Thickness, Thickness of concrete slab depends on loads and size of the slab. I am a Civil Engineer by profession but Ive specialized and taken the journey in the field of Quality Engineering. Reinforced concrete allows a wide range of structural options and provides cost-effective solutions for a multitude of situationsfrom residential buildings with moderate live loads and spans of about 25 ft, to commercial buildings with heavier live loads and spans ranging from 40 ft to 50 ft and beyond. Formula: One way slab = Longer span /Shorter span 2 . Different standard would specify different slab thickness requirement however we can calculate the basic requirement and minimum thickness considering the above factor. So a wall thats around 714 inches thick is the result. Buildings of all kindsresidential and commercialtypically have a six-inch (150mm) slab thickness. It is possible to have different slab thicknesses within a single column/pedestal's punching shear perimeter. RCC roof slab is horizontal structure is to provide flat surface on floor/ceiling in building. If so there are not other considerations. 34, Effective depth: d = D (cover)- (dia of bottom bar/2), In a residential building it is 9 12 or 225 mm 300 mm standard size according to (IS codes). Slab thickness formula: slab thickness formula calculation is only based on construction and detailing requirement according to BS8110 part 01 says that, Slab thickness formula = (Cover 4)+ (Dia of bar 4)+ (aggregate size +5). = [ 2500kg/cum. Slab area in square meters: 100.00 m 2. Determine the initial thickness of the slab between a one way slab spanning 8m between supporting beams and a flat slab in a 8m x 8m grid. 2. We recommended to use 5 to 6(125mm to 150mm) rcc roof slab thickness for one way slab. 8000mm / Eff. It's fairly straight forward, although this method assumes a thickened slab-on-grade (it's a 'thickened' slab system with interior grade beams). On the other hand, residential and commercial structures need a six-inch thick concrete slab. From pg no 91 IS 456-2000. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. The slab sections are designed as rectangular beam sections 1000 mm wide. Slab thickness for one way slab:- thickness of one-way slabs must be at least L/20 for simply supported slabs; L/24 for slabs with one end continuous; L/28 for slabs with both ends continuous; and L/10 for cantilevers; where L is the span. We recommended to use thickness of slab is 125mm used for 1, 2 and 3 storey building. The thickness of one-way slabs should be at least L/20 for supported slabs; L/24 for slabs with one continuous end; L/28 for slabs with both constant ends; and L/10 for cantilevers; where L is the span. AddThis use cookies for handling links to social media. of the slab = [unit weight volume of the slab] = [ D ( Ls Ws Ts )] = [ 2500kg/cum. In this example, dimension of the slab panel is 2025. i. outside (x > d/2,) and. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! The thickness of a glass slab is 0.2 m 0.2m 0. Maximum Size of Concrete Slab, Beam and Column | Calculation Formula, How to Load Transfer from Slab to Beam | Formulas with Example, Difference Between Slab Culvert and Box Culvert | Types of Culvert, How to Calculate Development Length for Different Grades of Concrete, How to Calculate No of Bricks in One Cft, Wall, Room and Building, What is Hidden Beam or Concealed Beam | Advantages & Disadvantages, Basic Knowledge of Brickwork | Brick Masonary | Tests or Grade of Bricks, Method Statement for Roof Waterproofing Application System, https://thecivilengineerings.com/about-me/, Calculate Bar Bending Schedule for One Way Slab, How to Calculate Quantity of Concrete Volume for Staircase, Dog Legged Staircase, Components & Design of Dog Legged Stair, Thumb Rules Formula for Civil Engineers & Quantity Surveyors. But if you use the Enercalc method you're doing your due diligence as an engineer. Answer (1 of 19): For Metric units Length x breadth x thickness x 25 KN Where 25 is the unit weight of RCC in KN/cum If units are in feet :- Length x breadth x thickness x 0.0283 x 25 KN Here 1 cuft = 0.0283 cum Ex:- calculate self weight of concrete slab having size 10 x 15and thickness. Its also possible that what works in one state may not be legal in another, depending on the laws in that state. If the only slab load requirement is the 250psf uniform load then the thickness of the slab is irrelevant. The thickness of RCC roof slab is vital factor in building construction designing and it is directly correlated with cost of a structural system building. The slab is infinitely long in the y-z plane, but has thickness d along the x axis. Design of typical Floor Slab: We have thickness of slab as 130 mm. However, most residential and commercial structures have a six-inch thick concrete slab. So we have given data: . How To Find Thick Your Concrete Slab Is You. For 4 t > s > 2 t, the thickness to be used shall be (Equation 7-5) where: s = Spacing of ribs or undulations. Typically, residential concrete slabs are between 4 and 6 inches thick. Whether it is 1 storey, 2 storey,3 storey or 10 storey or high rise building or apartment, one way slab or two way slab,flat slab, the thickness of the slab is based on the span and type of slab and not on the number of stories. no. Therefore, the minimum concrete thickness can be calculated as follows. The basement space has become inefficient as a parking area so I'd like to transfer this whole structure to an 8x8 or 16x16 grid of columns by using the transfer floor/slab. As someone else mentioned, a uniform load in a perfect world doesn't really induce shear or bending. Choose 5 for your design. We recommended to use 4 to 5(100mm to 125mm) rcc roof slab thickness for two way slab. There are a few rules of thumb you can plan with and your codes may specify minimums, but if you are worried about l. Thus a 4m slab May be assumed to have 200 mm depth. In building, the slab thickness is normally between 100 to 200 mm. Slab thickness formula:- slab thickness formula calculation is only based on construction and detailing requirement according to BS8110 part 01 says that. of steps in flight x tread) + width of landing beam] Thickness of waist slab = span /20 = 4000/20 = 200 mm To learn the remaining process, watch the following video tutorial. Sandwich precast concrete walls, with the 1-4-inch insulation, should be 5-12 inches thick as well. Is063 Floor Systems. Calculate the square footage by measuring the length and width of the area to be covered. 6 rebar spaced 4 inches on center is P = 8.33_6_0. Mx = x wlx 2. The minimum thickness of the slab base is calculated from t = sqrt( 3w/Qbs * (a^2 ? We have assumed the slab to be simply supported - Therefore, the span/effective depth ratio = 20. Copyright 2022 CivilSir That, however, would be a bad idea. Enter the dimensions of the slab concrete foundation: Enter width in m: Enter length in m: Enter the thickness (depth) in mm: Calculation results: Slab volume in cubic meters: 20.00 m 3. Manage Settings Just a quick note on the design guide - this was written a while back, so I think the examples use ASD load combinations, as opposed to using LRFD factors for load combos and strength checks. Traffic engineers, any thoughts on this? Roof slab thickness for 1, 2, 3 or multi storey house | slab thickness for 2 storey house | Slab thickness for 3 storey house | slab thickness formula | slab thickness for high rise building | slab thickness for apartment | slab thickness in mm, inches and metre. If you find this post helpful, then help others by sharing it on social media. Copyright 2008 - 2022 The Civil Engineering Blog. Assuming span between two support is 12 feet long, using Thumb Rule for calculation of slab thickness span/30, we get slab thickness = 1212 inch/30=4.8, that is taken as equal to 5(125mm) thick. Column Dimensions. = 4125kg. the minimum thickness of the slab. 43/30 = 0.72 percent. 10. Just keep that in mind when checking the slab's flexural and shear capacity. It shows typical 2 landings of 1.5 meter length (i included top landing 250mm portion in trade to make calculation simple) It shows trade and riser dimensions and thickness of the slab. This the theoretical requirement for the thickness of the slab. The increased thickness of the concrete slab might range from 8 to 12 inches. Hi! For example, the percentage of reinforcement of a 30-inch slab with two layers of No. They reference the method used. Slab thickness for apartment:- thickness of slab for apartment must be at least L/20 for simply supported slabs; L/24 for slabs with one end continuous; L/28 for slabs with both ends continuous; and L/10 for cantilevers; where L is the span. At CivilSir, we share all the information related to civil engineering. Additionally, floors must be at least 12 inches below the frost lines in areas where freezing is a problem. NOTE:These are the standard RCC column sizes, but it will increase or decrease with respect to the load. a, b - larger and smaller projection, respectively of the slab base beyond the rectangle . askcr9. Maximum Height of Concrete Column, tandards such as ACI 318 specify the minimum thickness of the slab based on the length of the slab. But I cant really find a formula to prove this actually works, because most of the slab on grade info I find online seems to be referring more towards pavement design. Not sure if you've been provided a value; that can vary from 20 to 50 or so. The whole panel should be thickened with a thick slab. Youll want to keep these considerations in mind while deciding on concrete slabs. Aspect ratio = longer span / shorter span. The minimum area of main reinforcement has to satisfy clause 9.2.1.1 (1) of Eurocode 2; As,min = (0.26fctm/fyk)btd but not less than 0.0013bd. The value of thickness in two way slabs(slabs supported on beams in all the edges and L/B less than 2.0) will be L/20, where L is the span. Ive worked as a Quality Engineer & Manager in the well-known companies in the Gulf region for almost Ten years. = 2.63. for example in high rise building if increase the thickness of RCC slab by 5mm result significantly increases column axial load. Slab thickness in inches:- General, 4 to 6 slab thickness is considered for residential and commercial building with reinforcement detail as per design. 1. Decide on the desired thickness of the concrete. = 10.02/3.81. The thickness of the slab is often selected to avoid excessive deflection during service. You can use the concrete thickness calculators online to calculate the thickness of concrete slabs. Its a good idea to make the foundation six to eight inches thick if heavy equipment is stored or used on it. Part of ancient Roman water system found in Stabiae, near Press J to jump to the feed. These slabs are mainly applicable where structure requires less formwork. If no beams are used for example in the case of flat plates and flat slabs, the minimum thickness of the slab could be taken from table-1. Step 3 - Using the IS 456 page 90 formula, calculate the area of steel present in tension and the thickness of slab and thereafter find the moment of resistance of slab. Typically, installing a concrete slab is $4 to $8 per square foot. Equation-3 will control the slab thickness if substantially stiff beam is used since equation-1 gives smaller thickness. spacing formula for main bars of columns: 1) 2) The total system completely counts on the geometrical dimensions of the slab in which if the ratio Long side / short side Two Way Slab Reinforcement Calculation A standard residential driveway is commonly 4-6 inches thick concrete with re-enforced steel bars 3 on the wind speed to account . Slab thickness for two way slab:-the minimum thickness of any two way slab without interior beams should not be less than the following: For slabs without drop panel 125 mm. i.e., Length= 12 x 250=3000 mm. I find it very interesting and helpful to learn the basic knowledge and also in learning new things everyday, Thanks for the comments please visit more articles by clicking on All Posts tab of the Menu Bar, Sir mere slab 9 inch ho Gaya hai Kya karu. And depending on the concentrated loads (forklifts, rack post loads,etc) and the slab contraction joint layouts the required slab thickness can increase significantly. Assuming that reinforcement ratios of 0.01 or more are expected, check whether your chosen slab thickness is acceptable. Basic Rules for Design of Column | Thumb Rules for Column Design, Basic Civil Engineering Knowledge for Freshers 101 Civil Engg Tips, Minimum Thickness of Structural Concrete Members or Elements. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Cookies are only used in the browser to improve user experience. Because these values do not apply to buildings that may be destroyed by substantial deflection, they can be employed. . Determination of Moments of slabs (Laterally . b^2/4 ) ) Where, Qbs = permissible bending stress in the slab base ( 185 MPa ) What is the difference between HO4 and HO6? https://law.resource.org/pub/us/code/bsc.ca.gov/sibr/org.wirereinforcementinstitute.TF700-R-07.pdf. RCC roof slab thickness for 1, 2, 3 storey house:- General, 6 inch (150mm) slab thickness is considered for residential 1 (G+0), 2 (G+1), 3 (G+2) storey and commercial building with reinforcement detail as per design. The stronger the slab will be, the more concrete is, normally put at a thickness of 2 inches or more. The article aims to answer the question How to calculate concrete slab thickness?. 1.65cum.] 2) concrete quantity calculation for staircase and its formula. To accommodate footings, it will have a width of up to two feet or more. The numerical of one-way slab - simply supported is explained in step wise procedure below: Step 1. So we widely-used concrete slab thickness 125 mm. Concept Videos. If there is a different thickness at any point along the punching shear perimeter, the program will use the thinnest thickness for the entire calculation. So this is the required time taken by the light to travel in the thickness of the glass slab. 3) minimum clear cover spacing between bar is equal to to aggregate size + 5, generally we use 20mm aggregate for concreting work. Number of Main Bars = Ly / spacing + 1 = (4000/150) + 1 = 27 nos Note - The trick point here was that the distance travelled by the light in the glass slab will be equal to the thickness of the glass slab. A dielectric slab of thickness t < d and area A is kept between the two plates. Minimum Standard Concrete Slab Thickness For Office Building Civil Sir. Negative Moment on Discontinuous Edge = 1/3 x 0.432 = 0.144 k-ft. 2.Calculate the weight of steel. Main Steel - 3d or 300 mm whichever is smaller; Distribution Reinforcement for Concrete Slab Design: Minimum Flooring Thickness In Any Residential Building Civil Sir. The thickness of a slab is determined by its deflection needs, excluding slabs that are substantially laden, such as those that carry several meters of dirt. Slab thickness in m:- General, 0.10m to 0.15m slab thickness is considered for residential and commercial building with reinforcement detail as per design. The red block therefore displaces 1.25 L water, an amount equal to the volume of the block. Take a look at their help file under the "misc calculation modules" section. Step 2 - Find out the grade of concrete. How do you calculate percentage of concrete in steel? Equation ( 2) approaches g_ { { {\text {shell}}}} = 4\pi G\rho h when the thickness approaches zero. Our report just said design the slab on ground to support a maximum load of 250 psf, and then I sized #4 bars both ways for temp and shrinkage but thats really it. Slab thickness for simply supported slab = span/20, one end continuous slab = span/24, both end continuous slab = span/28, cantilever slab = span/10 we used. These applications will - due to browser restrictions - send data between your browser and our server. Concrete slab thickness = 20 x 2 + 10 x 4 + 20+5 = 105 mm. These deflection limits are defined in terms ofL/d ratio, where Lis theeffective span&dis theeffective depthof the beam member. Therefore we should limit the thickness in any building construction to Limit required by design the key factor affecting the minimum thickness of slab can be applied load,span of slab, durability of concrete, length of span fire safety requirement etc. What is the standard size of slab thickness? if you need to build beyond it. Welcome to my blog. Where span is clear distance between two support. If deflections are computed and judged to be acceptable, the ACI Code restricts the thickness of the slab. As the deformation of the slab during impact is not very significant, impact and slab deformation are calculated separately: -. The outer wythe of thin-shell wall panels is typically 1.5 to 3 inches thick and is made of concrete. These places include walkways, sheds, and patios. Negative Moment on Discontinuous Edge = 1/3 x 0.432 = 0.144 k-ft. then we have to increase the column size reinforcement, Foundation size and beam size and beam reinforcement. Calculate the volume of concrete needed for a slab using metric measurements. Round concrete columns should be 9 inch diameter, minimum, and square concrete columns should be 8 inches by 8 inches, minimum. inside (0 < x < d/2). We recommended to use 4 to 8(100mm to 200mm) rcc roof slab thickness for apartment. A slab that is four inches thick is the most common. Note: Depending upon the various building design considerations the slab thickness varies. Using deflection requirements, calculate trial factored loads based on the projected thickness of the slab. The design of slabs for these conditions is covered in ACI 360. of the beam Formula's used: length * width * depth = V Example calculation: . We don't collect information from our users. So if you make a column of size 250mm x 250mm it should not exceeds the height of 3m. Move up/down to post spacing, x = 5. An essential part of the design process is selecting and computations of slab thicknesses for various slab types. Save my name, email, and website in this browser for the next time I comment. Four (150mm) inches is more common for a slab. Solution: From the given formula of lateral displacement we have, Given t = 5 cm, i = 45 and r = 30 The density of the red block is: (1.4.4) d e n s i t y = m a s s v o l u m e = 5.00 k g 1.25 L = 4.00 k g / L. Note that since the yellow block is not completely submerged, you cannot determine its density from this information. https://enercalc.com/sel_help/. If necessary, appropriate techniques should be used. It needs tie beams Minimum Concrete Thickness. Calculate the square footage by measuring the length and width of the area to be covered. Local authorities may tailor their rules to local situations, even though local laws follow international norms. calculation of pipe whip and impact with TEDEL assuming the slab is perfectly rigid, A variety of variables influences concrete slab thickness. . For example, calculating the thickness of a one-way slab is a lot simpler than calculating the thickness of a two-way slab. Minimum thickness of concrete structural elements based on ACI 318-14, IRC 2009, IS 456 2000, and UBC 1997 is presented. Welp. We and our partners use cookies to Store and/or access information on a device. Exterior Wall Thickness: How Thick Should Your Walls Be?. Slab thickness 175mm Fck 25N/mm2 fyk 500N/mm2 Cover to the reinforcements 25mm Office building Slab loading Self weight = 175x25x10-3 = 4.375kN/mm2 Ultimate load = 1.35gk+1.5qk = 1.354.375+1.54 = 11.91 kN/mm2 Bending moment n = 11.91 kN/mm2 Bending moment M = 11.91*1.5*1.5/2 = 13.4 kNm Assume T10 bars used for the span Remember, all values should be computed in m. Please read AddThis Privacy for more information. Evolution Of Building Elements. Slab thickness formula = (Cover 4)+ (Dia of bar 4)+ (aggregate size +5) Therefore minimum concrete thickness can be calculated as follow =202+104+20+5=105mm. Building a concrete slab that is either too thick or excessively thin may lead to financial and structural problems. The minimum thickness of the rectangular slab base, supporting columns under axial compression is given by -. The calculation is only based on construction and detailing requirement according to BS8110 part 01. The typical thickness of a slab is between four and six inches. If the consistency is chosen based on deflection requirements, it must still be tested throughout the design process. There are several things to consider while creating concrete slabs, and this article goes through some of those things. The area can be calculated from given formula; Mu = 0.87 fy As [ d - fy As/ fck b] . The thickness of concrete slabs is also determined by local building rules, depending on the kind of construction, the span of the slab, and the thickness of the concrete. 1.3 Minimum thickness of Slab on the ground UBC recommends minimum thickness of Concrete floor slabs supported directly on the ground to be 89mm, whereas BCGBC4010A - Apply structural. For slabs with drop panel 100 mm. I have read through ACI 360R-06 "Design of slabs on ground" and -10 and none of which really have given me a suitable way to prove that the thickness I assumed works. Staircase and its formula basic information for Engineering and design of Technical!! + 10 x 4 + 20+5 = 105 mm things to consider while creating concrete slabs using measurements... 130 mm calculate trial factored loads based on construction and detailing requirement according to BS8110 part 01 if equipment! Used on it d - fy As/ fck b ] 0.144 k-ft. 2.Calculate the weight steel. Less formwork: we have assumed the slab is often selected to avoid excessive deflection service... And 3 storey building red block therefore displaces 1.25 L water, an amount equal to the volume of area. As/ fck b ] residential and commercial structures have a six-inch ( 150mm ) thickness. The frost lines in areas where freezing is a lot simpler than calculating the thickness of a glass slab 0.432. Range from 8 to 12 inches two way slab = [ unit volume! As rectangular beam sections 1000 mm wide one way slab will be the... And website thickness of slab formula this browser for the next time i comment = 0.144 2.Calculate. Thick your concrete slab that is four inches thick as well therefore displaces 1.25 L water an! A concrete slab 2 inches or more method you 're doing your due diligence as Engineer... Dimension of the slab 's flexural and shear capacity 250psf uniform load then the thickness of slab. The red block therefore displaces 1.25 L water, an amount equal to the volume of concrete possible to different! Chosen slab thickness is normally between 100 to 200 mm the weight of steel Stabiae... 100Mm to 200mm ) rcc roof slab thickness is normally between 100 to 200 mm area a is between! Improve user experience Tools and basic information for Engineering and design of Technical Applications elements based on construction and requirement... Trial factored loads based on construction and detailing requirement according to BS8110 part 01 ( ). As the deformation of the slab to buildings that may be destroyed by substantial deflection, they can be.... A one-way slab is horizontal structure is to provide flat surface on floor/ceiling in building these deflection limits defined... Of thin-shell wall panels is typically 1.5 to 3 inches thick `` misc calculation ''! = Longer span /Shorter span 2 area to be simply supported is explained in step wise procedure:... Displaces 1.25 L water, an amount equal to the volume of the concrete slab thickness formula: slab... The block, we share all the information related to Civil Engineering does n't really induce shear or bending authorities! Substantially stiff beam is used since equation-1 gives smaller thickness loads based on construction and detailing requirement according BS8110... Slab base, supporting columns under axial compression is given by - beam is used since gives... X27 ; s punching shear perimeter to 200mm ) rcc roof slab thickness for one slab... And minimum thickness of the area can be calculated from given formula Mu... Pipe whip and impact with TEDEL assuming the slab red block therefore displaces L... Six-Inch ( 150mm ) inches is more common for a slab that is either too thick or excessively may... Thickness? 20 x 2 + 10 x 4 + 20+5 = 105 mm sqrt ( 3w/Qbs * a^2... Are expected, check whether your chosen slab thickness? include walkways, sheds, and UBC is... 8 per square foot the block of typical Floor slab: we have thickness of a.... Fy As/ fck b ] 0.2m 0 though local laws follow international norms thickness is normally 100... Thickness is normally between 100 to 200 mm as follows base, thickness of slab formula! K-Ft. 2.Calculate the weight of steel a column of size 250mm x it! How thick should your walls be? Edge = 1/3 x 0.432 = 0.144 k-ft. 2.Calculate weight! The 250psf uniform load then the thickness of slab thicknesses for various types... Considering thickness of slab formula above factor d/2, ) and and impact with TEDEL assuming the slab thickness formula is! Should not exceeds the height of 3m flexural and shear capacity because values! Sections 1000 mm wide by 8 inches by 8 inches, minimum, and this article goes through some those! Thick your concrete slab thickness standard concrete slab thickness for Office building Civil Sir projected of. Ts ) ] = [ d ( Ls Ws Ts ) ] = [.! Building a concrete slab that is four inches thick if heavy equipment is stored used... Taken by the light to travel in the browser to improve user experience common for slab. ( 150mm ) slab thickness varies as [ d - fy As/ b! Slab as 130 mm is between four and six inches whether your chosen slab formula! Stabiae, near Press J to jump to the load above factor 200mm ) roof! B ] system found in Stabiae, near Press J to jump the... Building, the percentage of reinforcement of a glass slab is 0.2 m 0.2m 0 layers of No employed... A wall thats around 714 inches thick and area a is kept between the two plates look at their file! Laws in that state - simply supported is explained in step wise procedure below: step 1 Find this helpful! Footings, it must still be tested throughout the design process these deflection limits defined! X 2 + 10 x 4 + 20+5 = 105 mm J to to... From 20 to 50 or so be at least 12 inches below the lines. Deciding on concrete slabs that can vary from 20 to 50 or so round concrete columns should 5-12... Between the two plates is a lot simpler than calculating the thickness of the slab perfectly! Area in square meters: 100.00 m 2 then the thickness of a slab. Thick as well * ( a^2 computations of slab as 130 mm is to provide surface... X = 5 provided a value ; that can vary from 20 to 50 or.! 130 mm or so be at least 12 inches be 5-12 inches thick heavy! Else mentioned, a uniform load then the thickness of a glass slab is perfectly rigid a... Step wise procedure below: step 1 inches or more is the required time by. You Find this post helpful, then help others by sharing it on media. Thin may lead to financial and structural problems you Find this post helpful, then others. ; thickness of slab formula = 0.87 fy as [ d ( Ls Ws Ts ) ] = [ 2500kg/cum, ).. Concrete columns should be 9 inch diameter, minimum, and UBC 1997 is.... # x27 ; s punching shear perimeter walkways, sheds, and patios most common Moment Discontinuous. Civilsir, we share all the information related to Civil Engineering percentage of concrete x 250mm it should not the! Some of those things thicknesses for various slab types is chosen based on the slabs mm.! Column/Pedestal & # x27 ; s punching shear perimeter mind when checking the slab will,... To 125mm ) rcc roof slab is horizontal structure is to provide flat surface on floor/ceiling in building calculating thickness! There are several things thickness of slab formula consider while creating concrete slabs upon the various design! 2.Calculate the weight of steel you Find this post helpful, then others... Someone else mentioned, a uniform load then the thickness of the thickness... Inside ( 0 & lt ; d and area a is kept between the two.... Area in square meters: 100.00 m 2 is 125mm used for,... And commercialtypically have a six-inch ( 150mm ) slab thickness for Office building Civil Sir 3 inches thick well., installing a concrete slab so a wall thats around 714 inches thick the! # x27 ; s punching shear perimeter & Manager in the y-z,. 125Mm to 150mm ) rcc roof slab thickness is acceptable footings, it must be! Is irrelevant inches or more are expected, check whether your chosen slab thickness if substantially stiff is. As rectangular beam sections 1000 mm wide chosen based on deflection requirements calculate. Load requirement is the required time taken by the light to travel in the plane! We have thickness of the slab to be covered used for 1 2! The laws in that state used for 1, 2 and 3 storey.. Respectively of the slab thickness = 20 x 2 + 10 x 4 + 20+5 = 105 mm panels... The height of 3m related to Civil Engineering well-known companies in thickness of slab formula well-known in! Civilsir, we share all the information related to Civil Engineering t = sqrt ( 3w/Qbs * ( a^2 to! Lead to financial and structural problems 2000, and UBC 1997 is thickness of slab formula! Substantially stiff beam is used since equation-1 gives smaller thickness inches or more mentioned, a uniform load in perfect... A perfect world does n't really induce shear or bending 2009, is 456 2000, and website this. Next time i comment center is P = 8.33_6_0 of all kindsresidential and commercialtypically have a six-inch ( )... Square foot deflection requirements, calculate trial factored loads based on deflection requirements, calculate trial factored loads based ACI. 2009, is 456 2000, and UBC 1997 is presented long the... $ 4 to 8 ( 100mm to 200mm ) rcc roof slab thickness? on construction and detailing according... That can vary from 20 to 50 or so then help others by sharing it on media... And commercialtypically have a six-inch ( 150mm ) slab thickness is normally between 100 to 200.... Increase the thickness of concrete in steel terms ofL/d ratio, where Lis theeffective span & dis theeffective depthof beam!
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