Highearly strength cements increase slab shrinkage. So i import etabs model to safe and just take uniform water load on base slab and point load from columns. Analysis of concrete slabs on grade civil engineering downloads. This video shows you how to calculate the amount of concrete required to pour a concrete slab on ground with splayed edge beam and a rebated.
Slab thickness design for industrial concrete floors on grade. Analysis of concrete slabs on grade spreadsheetdownload free. Aci the modulus of subgrade reaction is an often misunderstood and misused concept for the thickness design of slabsonground. Reinforced concrete structural software includes programs for column design pcacolumn, beam design pcabeam, slab design pcaslab, wall design pcawall, mat design pcamats, foundation design. Just throw the point load on a 12x12x12 thick steel plate and your good to go. American concrete institute, design of slabs on grade. When cracks are held tightly or remain small, the aggregate particles on the faces of a crack interlock thus providing load transfer across the crack.
Concrete slab on grade analysis calculator for post or wheel. The plate wouldnt even need to be that wide if you consider. For more than 90 years, the publication has been the cement and concrete industrys primary reference on concrete technology. Calculators for structural engineers, construction professionals and steel building specifiers. Expanded illustrations of the theory and fundamentals and new timesaving design aids were added to include a wider range of concrete strengths. It also s h ows which methods aid in slab thickness selection, and which h a v e information on related det a i l s, such as joint spacings and rei n f o r cement re q u i re m e n t s. A design example for a rectangular concrete tank pca design method cven 48304434 university of colorado, boulder spring semester 2008 prepared by ben blackard. The construction and design of concrete slabs on grade.
We have a initial thickness design of the concrete slab following the methods outlined in pca publication slab thickness design for industrial concrete floors on grade as well as wri charts as used in ringoandersons book designing floor slabs on grade. Nonsubgrade support can result in slab cracking due to stress concentrations induced by an. The sixth edition of pcas concrete masonry handbook for architects, engineers, builders reflects stateofthepractice for concrete masonry construction presented in a new layout style. Search for library items search for lists search for contacts. A new method for designing floor slabs on grade due to the. A new method for designing floor slabs on grade due to the difficulty of applying simplified design methods, amongst them being the portland cement association pca and wire reinforcement institute wri methods. You can access tables from previous editions of the handbook as well as the current edition. Structurepoint, formerly the pca engineering software group, offers concrete design software programs updated to aci 31814 for concrete buildings, concrete structures and concrete tanks. For additional explanations on using these tables, refer to the respective handbook editions. Analysis of concrete slabs on grade civil engineering community. Guidelines and standards standard and guide details. General design guidelines facility design guidelines standard and guide details. Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade.
The construction and design of concrete slabs on grade d. With the right design, the detractors of slab foundations can be reduced or doneawaywith entirely, and the benefits can be maximized, making slabongrade a fantastic choice for home building in ottawa. Shrinkage and curling of slabs on gradedrying shrinkage. For most conventional slab on grade design, the steel does not have to be discontinuous at the. Pca slab grade design charts free download as pdf file. 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. The slab may be of uniform or variable thickness, and it may include stiffening elements such as ribs or beams. Dec 15, 2017 also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required slab thickness for flexure. Also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required slab thickness for flexure. Concrete slab on grade thickness analysis for slab subjected to concentrated post loading for k 100 pci per pca slab thickness design for industrial concrete floors on grade figure 7b, page 10.
The new 1996 edition reflects the industrys current knowledge of posttensioned groundsupported slabs and is easier for design professionals to use. Jul 31, 2014 interior concrete should not crack or curl excessively requiring grinding before the flooring can be installed. Guide to design of slabsonground reported by aci committee 360 aci 360r10 this guide presents information on the design of slabsonground, primarily industrial floors. Control of shrinkage and curling in slabs on grade concrete. Designing floor slabs on grade by boyd c ringo robert b anderson. Analysis of concrete slabs on grade spreadsheet grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade.
Concrete slab on grade thickness analysis for slab. Pca design method cven 48304434 university of colorado, boulder spring semester 2008 prepared by ben blackard. The original theory pca slab grade design charts equations by h. More than 200 color photos describe designing and building with concrete masonry. If you are author or own the of this book, please report to us by using this dmca report form. Pca slab grade design charts reinforced concrete concrete. Concrete slab supported di rectly on foundation soil.
A fresh concrete mixture is a fluid, plastic mass that can be molded into virtually any shape, but as the material hardens there is a reduction in volume or shrinkage. Since the book s initial publication in 1980, it has been used by engineers and contractors to successfully design and construct hundreds of thousands of posttensioned slabs on ground. Type b, reinforced only for shrinkage and temperature. From the below fig, it is clear that the wall stands on a footing and the grade slab is resting on a layer of gravel and moisture barrier. This document was uploaded by user and they confirmed that they have the permission to share it. Splitslab waterproofing in highload traffic environments. Slab thickness, t area of steel provided, as pca note. Interior concrete should not crack or curl excessively requiring grinding before the flooring can be installed. The book is backed by 100 years of research by the portland cement association. Concrete slab on grade thickness analysis for slab subjected to single wheel loading from vehicles with pneumatic tires per pca slab thickness design for industrial concrete floors on grade figure 3, page 5. The pca method determines slab thickness based on the modulus of rupture of the con crete without counting on any flexural strength improvement from.
The aci and pca documents should specify that cements with limited shrinkage be used for slabs on grade. The following sections from the pci design handbook include interaction curves, load tables, and section properties for various precast concrete components. I could not find a better reference that covered the subject matter like this book does. An interior load condition is assumed for flexural analysis.
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. It is important to recognize that using steel reinforcement in a concrete slab actually increases the potential for the occurrence of random hairline cracks in the exposed surface of the concrete. Choosing design methods for industrial floor slabs concrete. Slab on grade or grade slab types construction procedure. But safe is showing tension on the base slab and the thickness from punching is 30. Foundations come in many types, and each one has its strengths and weaknesses. Tm 580912 concrete floor slabs on grade subjected to.
Pca concrete floors on grade free download as pdf file. For slab subjected to concentrated post loading for k 100 pci per pca slab thickness design for industrial concrete floors on grade figure 7b, page 10 instructions for use of figure 7b. Program description this is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Using the cfs slab calculator, you can quickly and easily generate designs and specifications for uniform loads, wheeled loads, and rack post loads. 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. In this context, design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications generally preceding construction. Asce, secb course content slab on grades construction. Posttensioning is very popular for slabongrade construction in some areas of the country. Fatigue failure due to slab flexure erosion failure due to foundation compression edge loads produce the worst stresses fatigue based on tensile stress due to edge loads corner loads produce the worst deflections erosion based on deflections due to corner loads 2. Then for the given parameters, the slab flexural, bearing, and shear stresses are checked, the estimated crack width is determined, the minimum required. The thinner you get, the more potential problems you have with the joints, which is where warehouse slabs nearly always break down. Concrete slab on grade analysis calculator for post or.
Supported grade slab or slab on grade foundation is chosen when the traditional footings are already framed on site to raise the columns. Reinforced concrete structural software includes programs for column design pcacolumn, beam design pcabeam, slab design pcaslab, wall design pcawall, mat design pcamats, foundation design, tank design, slab on grade design and frame analysis pcaframe. I could not find a better reference that covered the subject matter like this book. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. I dont have a copy of aci 360 or the pca design book for slabongrade design, but are these necessary if i could check the slab with aci318. Circular tank example h 16 ft d 90 ft t 6 ft grade. Placing the steel any lower than this limit could, however, adversely affect the performance of the slab. Concrete edition is to provide information regarding the effective use of above and belowgrade concrete wall systems, as well as concrete floor systems to illustrate costeffective, robust practices for residential construction. Analysis of concrete slabs on grade civil engineering. Free concrete design publications from pca concrete.
In addition to an updated thickness design procedure, the text includes a discussion of concrete drying, shrinkage, joint stability, floor flatness and levelness, moisture testing and floor coverings, concrete durability, floor maintenance and repair, special floor types including white concrete floors, and a glossary of slabonground terms. The new and improved slabonground design manual concrete. Specifically, a concrete slab on grade may be subjected to concentrated post or wheel loading. Key factors to consider include type of slab construction and loading conditions. Information on other aspects, such as materials, construction methods, placement of concrete, and finishing techniques, is included only where it is. Grdslab concrete slab on grade analysis spreadsheet. Table 2 s h o ws which design method to use in selecting the appro p r iate slab. Designers of commercial and institutional buildings in urban settings often work on constrained sites where the service areas exposed to weather or. Asce 3201 design and construction of frost protected shallow foundations for exterior equipment pads ringos book, mentioned above, aci 302 guide for concrete floor and slab construction aci 360 design of slabs on ground pca slab thickness design for industrial concrete floors on grade pca concrete floors on. All forces act normal to the surface shear and friction forces are assumed to be negligible. Get in touch with us to find out more about how windmill construction and the benefits of slab on grade. Industrial slabs on grade take a lot of punishment. The fully revised 16th edition published in 2016 by the portland cement association pca provides a concise, current reference on the fundamentals of concrete technology and. Slab is considered as unreinforced concrete beam, so that any contribution made to flexural strength by the inclusion of distribution reinforcement is neglected.
Stepbystep procedures, sample solutions, and commentary. Evaluate the design and actual batch weights for the data in table 11 to determine if the actual values are within the specifications. 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. Concrete slab on grade thickness analysis for slab subjected. Concrete floors on ground portland cement association. For most conventional slabongrade design, the steel does not have to be discontinuous at the. Background information on design theories is followed by discussion. Also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required. Analysis of concrete slabs on grade is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Oct 28, 20 this video shows you how to calculate the amount of concrete required to pour a concrete slab on ground with splayed edge beam and a rebated edge. Modulus of subgrade reaction which one should be used. It addresses the planning, design, and detailing of slabs. Point load on unreinforced slab on grade structural.
Besides presenting a 30 percent increase in new information, this edition has new chapters on concrete pavements and structures illustrating where concrete meets the needs of modern society. The portland cement association pca has publications for designing rectangular and circular. Placing joints in concrete flatwork why, how, and when. So i have decided to make underground water tank base slab as a footing for column. Concrete slab on grade analysis the engineering community. Using the cfs slab calculator, you can quickly and easily generate designs and specifications for. Stepbystep procedures, sample solutions, and commentary ringo, boyd c. Jun 01, 2015 program description this is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. That is, the concentrated post or wheel load is assumed to be well away from a free slab edge or corner. Where nonuniform sub grade materials are encountered, steel reinforcement is recommended to control slab cracking. The slab on grade worksheet assumes a structurally unreinforced slab, aci360.
Mar 31, 2014 grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. How to design a concrete slab on grade duane craig pin share tweet share email a foundation is an extremely critical part of the building. The use of these highearly cements is promoted for slabs on grade by aci 302, which somewhat arbitrarily requires a minimum 3day compressive strength of 1800 psi 12. A design example for a rectangular concrete tank pca. Very good reference for designing concrete slabs on grade. The fully revised 16th edition published in 2016 by the portland cement association pca provides a concise, current reference on the fundamentals of concrete technology and construction. It was concluded that designing plain concrete slabs without reinforcement on grade according to pca and the wri methods leads to slab fatigue, even though. A new method for designing floor slabs on grade due to the difficulty. The pca and wri slab on grade design methods for industrial floors led to a design for concrete fatigue, even though 2. Pca 100 2012, prescriptive design of exterior concrete walls for one and twofamily dwellings, eb562. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Point load on unreinforced slab on grade jrstructuraleng structural 30 jan 08 14.
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