Concrete slab calculator free calculator to figure. April 11, 2020 normal consistency for the cement vicat apparatus laboratory tests april 9, 2020 general specifications of cement concrete work in building concrete technology april 6, 2020 5 safety tips to protect construction workers in the summer construction articles. This application can be used to make quick parameters calculations of beams and reinforced concrete slab not only in the office but also at the construction site. Guide to design of slabs on ground reported by aci committee 360 aci 360r10 this guide presents information on the design of slabs on ground, primarily industrial floors. All you have to do is enter the dimensions and thickness, hit calculate, and it figures the concrete yardage for you.
There are a few rules of thumb you can plan with and your codes may specify minimum. Calculate rebar spacing, layout and weight in a concrete slab inch. Headquartered in sun prairie, wisconsin, we are one of the largest manufacturers of steel selfstorage systems in the industry. Download best concrete design excel spreadsheet free. Rebar calculator slab, driveway or patio calculate the amount of rebar reinforcement needed for slabs and drive ways.
Recommended thickness of concrete slabs engineering toolbox resources, tools and basic information for engineering and design of technical applications. Minimum thickness of concrete slab concrete slab thickness. What are the thickness tolerances applicable to slabs on grade. Enter values for design factored moment, beam stem width, b w, effective depth, d, span, spacing, and slab thickness not all parameters are used for all calculations. The slab on grade worksheet assumes a structurally unreinforced slab, aci360. The calculator will automatically estimate the number of cubic yards of concrete that will be required. Grdslab concrete slab on grade analysis spreadsheet cesdb. I assumed a typical value of commercial buildings of 6 thickness of concrete. Calculate the thickness of the edge of a concrete slab ongrade floor required to support a wall load.
Download structural analysis software reinforced concrete calculator 2. Tensile strength conversion sheet for slab on grade fiber dosage calculations. Generally costs less to install than slabs designed by other methods. Pdf design of stiffened slabsongrade on shrinkswell soils. The amount given as needed, does not include any waste. Using the cfs slab calculator, you can quickly and easily generate designs and specifications for uniform loads, wheeled loads, and rack post loads. Flat concrete structure built on top of the soil at ground level and does not require support from underground footers or foundation walls. I have a max 250 psf load acting on the slab on grade, resting on a silty clay soil. Concrete floor slabongrade design problem 1 required concrete thickness. Concrete slab on grade analysis calculator for post or. Using the shentu method for minimum base plate area and slab capacity, i can get a reasonably sized base plate to distribute the load effectively and avoid punching shear.
Calculators for structural engineers, construction professionals and steel building specifiers. The grid is the horizontal and vertical spacing of your rebar. While other factors including concrete compressive strength, the thickness and quality of the. It addresses the planning, design, and detailing of slabs. What is grade slab and what is the difference between. Background information on design theories is followed by discussion. Noteuser must determine slab thickness from figure 7b, and input the result in cell slab thickness, t. Is there a formula to determine thickness of a slabongrade. Note that design moment for slabs is calculated on a typical 1ft wide section of the slab. The structural design of a concrete floor slab on grade is primarily controlled by the stresses caused by moving live loads and in some cases the stationary loads. Calculate the maximum wall loadin pounds per linear foot that the edge of a concrete slab on grade floor can support by providing the following input. This free concrete calculator estimates the amount of concrete necessary for a project, and can account for different shapes and amounts of concrete. Using rebar as reinforcement adds considerable strength to concrete and reduces the overall slab thickness needed. Tm 580912 concrete floor slabs on grade subjected to heavy.
Concrete rebar calculator plan view diagram round measurements to 2 116 18 14 12 running bar points length left to right. Concrete slab calculator free calculator to figure concrete. Design a warehouse floor slab for an interior wall load of 1400 plf, stationary live load of 1200 plf, exterior wall load of plf and an average daily volume of 2515 kip forklift trucks per day using 4000 psi concrete and a modulus of subgrade reaction, k 150 pci. An interior load condition is assumed for flexural analysis. This spreadsheet is only valid for wwm and steel designs where the thickness of the slab will support the loading conditions and the steel is located in the top half of the slab only. Mar, 2019 also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required slab thickness for flexure. This 12 x 12 footing needs to be calculated 12 x 16 so the footing is figured to go above grade to reach the 4 slab thickness. Concrete slab on grade thickness analysis buildings guide. Tensile strength conversion sheet for slab on grade fiber dosage calculations project description. Press update button the required reinforcement area, a s, will be calculated for slabs, the required spacing of a. Analysis of concrete slabs on grade spreadsheet download free december 15, 2017.
The slab on grade worksheet assumes a structurally unreinforced slab, aci360type b, reinforced only for shrinkage and temperature. Concrete slab on grade thickness analysis for slab subjected. The diagram will resize and rescale to fit the page as it grows. Engineers quite often find the need to measure the thickness of a concrete slab, when they require making some modifications to the slab. Online calculator of concrete slab maximum wall load. Minimum slab thickness of rc slab to prevent undesirable. Online calculator for calculating concrete slab on grade thickness calculators for structural engineers, construction professionals and steel building.
Dec 15, 2017 grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Once ive determined the average grade of the dirt, i can set the finish concrete floor grade up 4, 5, or 6 inches from that, depending on how thick i want my concrete floor. Many theoretical analyses show that no lessening of the requirements is. Analysis of concrete slabs on grade spreadsheetdownload. Then use the calculator to figure the amount of concrete needed. This grade slab acts as the foundation for a home or building, and provides a stable base for w. How thick does concrete need to be to hold up weight. Calculating the amount of bar needed can be done in a few simple steps. E the modulus of elasticity for the slab typically 4. The design procedure includes determini ng slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. Enter the thickness, width and length to find the number of cubic yards or bags of concrete needed for your project.
To use the concrete slab calculator, simply enter the width, length, and thickness of your pour. Mar 31, 2014 grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Starting at top left of plan, enter side lengths clockwise around slab top left to right and hit correct direction arrow to draw sides. I currently have a situation where column loads of up to 50 kips will be applied to a slabongrade 6in thick reinforced. Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. House slabs on grade that are 8 out of grade with a 4 slab also have some of the footing above the grade too. Oct 28, 20 download concrete calculator a small software application that helps you calculate the exact amount of concrete you need, depending on the dimensions of a slab.
Further safety may be obtained by reducing allowable extreme fiber stress to a smaller percentage of the concrete flexural strength. Online concrete slab on grade analysis calculator for slab subjected to interior concentrated post or wheel loading assuming slab is reinforced for shrinkage and temperature only. Exact spacing width 16 middle space 10 total bar length 416. When i know my average thickness of the concrete, i can plug those numbers into the concrete calculator itll tell me how many cubic yards to order. As per aci 31814 code, the value of nonprestressed beams is equivalent as above. According to unified building code ubc, the least thickness of ribbed slab should be 112 distance among ribs or 51mm. Concrete thickness for flatwork, such as slabsongrade and driveways, a minimum thickness of four inches is required, but increasing the thickness to five inches can add nearly 50 percent to the loadbearing capacity. But in this case im dealing with large single loads from columns that are acting on a slab on grade so shear breakthrough punching shear is a problem. Enter the depth, width and length of your concrete slab to calculate. Also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required slab thickness for flexure.
It is recommended, depending on the job you are doing, to add anywhere from an extra 4% to 10% to your concrete order to make sure you have enough concrete to finish the job. For 6 to 10 thick slabs on grade with k values between 100 pci and 200 pci, the increase in stress, i, due to a 2nd wheel or post load as a. When installing a concrete slab or structure it is a good idea to add rebar, or reinforcing bar, to reinforce it and prevent it from cracking down the road. Interior walls of the living area elevated are composed of 2x4 studs at 16 inches on center o. Calculate the maximum wall loadin pounds per linear foot that the edge of a concrete slabongrade floor can support by providing the following input. Slab on grade shrinkage reinforcement will be located 40 mm 112 inches from the top of the slab in order to restrain shrinkage and reduce curling. Local thickening of a slab on grade structural engineering. Optimize your fiberreinforced concrete slab on grade. Compressive strength in pounds per square inch or kilo pascals. Grdslab spreadsheet program helps in grade analysis of.
This spreadsheet consists of many segments regarding rcc aspects as described below. Explore other calculators related to housing or building, as well as hundreds of other calculators addressing finance, math, fitness, health, and more. Calculating concrete for your project is easy with this free concrete calculator download for your desktop computer. The ability to analyze the capacity of a slab on grade subjected to continuous wall linetype load as well as stationary, uniformly distributed live loads is also provided. For the design of an actual structure, a competent. After over 110 years of experience, weve mastered the art of developing smart building products designed, engineered, and customized to meet your needs. This concrete calculator will help you in estimating the amount of concrete needed for your project. The cfs slab calculator allows you to quickly and easily calculate slab thickness and fiber dosage as well as generate downloadable design documentation for your project. The sikafiber software for calculating fiber reinforced concrete slabs on grade. A2slab thickness design by wri method a3design examples using coe charts a4slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l.
The design procedure separately incl udes determining thickness of slab under wall load. Stresses in floor slabs on grade resulting from vehicular loads are a function of floor slab thickness, vehicle weight and weight distribution, vehicle wheel or track configuration. Download from so many useful civil engineering files for free. Appendix 2slab thickness design by wire reinforcement institute method. Slab thickness design for industrial concrete floors on grade is195. This calculator is not intended to be used for the design of actual structures, but only for schematic preliminary understanding of structural design principals. Problem clinic tolerances for slabongrade thickness.
Concrete slab volume calculator with edge and internal beams first, draw the shape of the slab. The ability to analyze the capacity of a slab on grade subjected to continuous wall linetype load as well as stationary, uniformly distributed. Tm 580912 concrete floor slabs on grade subjected to. Files download best concrete design excel spreadsheet free. 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. Modulus of subgrade reaction in picocurie or megapascals. Download free demo updated august 8, 2019 soilstructure slab on grade software simplifies the calculation of a. Concrete floor slabs design requirements, equations and. For slab subjected to concentrated post loading for k 100 pci. Using the cfs slab calculator, you can quickly and easily generate designs and specifications for. Concrete slab on grade analysis the engineering community. Concrete floor slabs on grade are subjected to a varie ty of loads and loading conditions.
Subgrade soil types and approximate subgrade modulus k values. Calculating concretefree desktop and smartphone concrete. Analysis of concrete slabs on grade spreadsheetdownload free. When im dealing with slabs on grade i choose thickness ussually 250 mm thick for residental structures and this is sufficient most of the time. Type b, reinforced only for shrinkage and temperature. Calculate rebar spacing, layout and weight in a concrete slab. Online calculator for calculating concrete slab on grade thickness calculators for structural engineers, construction professionals and steel building specifiers. Calculating the capacity of a slab on grade is dependent on arrangement of stationary, continuous wall linetype load and live loads distribution uniformly. Reinforced concrete calculator calculations of beams and. Explore other calculators related to housing or building, as well as hundreds of other calculators. As crosssectional area in square inches of steel per lineal foot of slab width t thickness of slab in inches fr tensile strength of concrete psi 0.
How to determine the necessary thickness of a concrete. Stresses in floor slabs on grade resulting from vehicular loads are a function of floor slab thickness, vehicle weight and weight. A supplementary method for examining and defining the necessary slab thickness for flexure is used along with the designed chart provided by portland cement association pca. Concrete slab on grade analysis calculator for post or wheel. When i know my average thickness of the concrete, i can plug those numbers into the concrete calculator itll. Files download grdslab concrete slab on grade analysis excel spreadsheet free.
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. Concrete slab thickness recommended thickness of concrete slabs. Design of stiffened slabs on grade on shrinkswell soils. Download grdslab concrete slab on grade analysis excel. Grdslab concrete slab on grade analysis spreadsheet. Floors centerjoint wall load calculate the maximum wall load that the maximum wall load that a concrete slab ongrade floor can support at a joint or at the centerinterior of the slab.
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