American concrete institute, design of slabs on grade. 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. A minimum soil bearing capacity of 2000 psf is required for construction of a circular concrete storage facility. Concrete slab on grade analysis the engineering community. Slab thickness and base tolerances for a more stringent fine grade tolerance, aci 11710 r. A new method for designing floor slabs on grade due to the difficulty example for calculating bending the pca and wri slab on grade design methods for some recent problems in applying aci 318 deflection criteria by a practical example generally below grade slab supported on concrete columns. Concrete slab on grade thickness analysis for slab. The design procedure set forth in that publication had at that time been in use by the author for about 15 years. A new method for designing floor slabs on grade due to the difficulty. Portland cement association method farny, 2001, that can be used for a variety of applications but not all. Some foundations used for light buildings on shrinkswell soils. The construction and design of concrete slabs on grade. Slab on grade or grade slab types construction procedure. For slab subjected to single wheel loading from vehicles with pneumatic tires.
Tm 580912 concrete floor slabs on grade subjected to heavy. The floor slab was poured ongrade with no provision to accommodate differential movement between the slab and grade beams. 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. Pca members represent 92 percent of us cement production capacity and have facilities in all 50 states. Appendix 2 slab thickness design by wire reinforcement institute method. Pca 100 2012, prescriptive design of exterior concrete walls for one and twofamily dwellings, eb562 this publication provides a simplified approach to the design of concrete footings, foundation walls, and above grade walls, both load bearing and nonload bearing, intended primarily for use in detached one and twofamily dwellings.
Concrete slab on grade analysis calculator for post or wheel. The scope of this article is limited to the design of industrial concrete floor slabs on grade for concentrated loads caused by the columns of freestanding. 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. The pca method determines slab thickness based on the modulus of rupture of the concrete without counting on any flexural strength improvement from temperature and shrinkage reinforcement. Pdf pca concrete floors on grade free download pdf. Aci 360, design of slabsongrade, refers to this as a type b slab. Pdf a new method for designing floor slabs on grade due to the. Appendix 1design examples using portland cement association method, p. Slabs on grade identifying the problem slabonground is a wellused building solution in north america and other parts of the world, and they are very well known to not provide healthy interior environments. Unit weight, wc 150 pcf top slab reinforcing yield, fy 60000 psi subgrade modulus, k 200 pci concentrated load, p 0. In this context, design is defined as the decisionmaking process of planning, sizing.
Flat slab analysis, design and detailing pdf civil engineering. Asce, secb course content slab on grades construction. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Introduction concrete slabs on grade are a very common type of concrete construction. Design of slabsonground aci 360r06 by american concrete institute 2006 4. Streses and stains in rigid pavements lecture notes 3.
Sum fatigue and erosion damage factors over all of the. Grdslab concrete slab on grade analysis spreadsheet. Pca slab thickness design for industrial concrete floors on grade. A4 slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l. Stepbystep procedures, sample solutions, and commentary. Streses and stains in rigid pavements lecture notes 3 by charles nunoo, ph. 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 slab on ground terms. Aci 360r pdf guide to design of concrete slab foundation. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. A3design examples using coe charts a4slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l. Pdf a new method for designing floor slabs on grade due.
Nov 12, 2018 before casting slab on grade, the earth is excavated up to the required depth and compacted to expel air voids. Numerous and frequentlyupdated resource results are available from this search. Concrete slab on grade thickness analysis for slab subjected. Pdf a new method for designing floor slabs on grade due to. The slab on ground is in direct contact with the typical draining layer such as. Concrete floors on ground portland cement association. Per pca slab thickness design for industrial concrete floors on grade figure 3, page 5 job name. Tm 580912 concrete floor slabs on grade subjected to. This paper presents a method of design and other issues related to industrial floors. These boards act as a concrete mould, which helps in identifying slab corners. Resilient design guide portland cement association. Appendix 2slab thickness design by wire reinforcement institute method. Concrete slab on grade analysis for slab subjected to interior concentrated post or wheel loading assuming aci360 type b design reinforced for shrinkage and temperature only job name. Stepbystep procedures, sample solutions, and commentary ringo, boyd c.
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. Stiffened slab on grade elevated structural slab on piers stiffened slab on grade and on piers thin post tensioned slab figure 1. Concrete slab on grade analysis calculator for post or. Such slabs on grade are commonly designed using slab thickness design methods such as the portland cement association pca method, the wire reinforcement institute wri method and the corps of engineers coe method.
Appendix 1design examples using portland cement association method. Pca 100 2012, prescriptive design of exterior concrete walls for one and twofamily dwellings, eb562 this publication provides a simplified approach to the design of concrete footings, foundation walls, and abovegrade walls, both load bearing and nonload bearing, intended primarily for use in detached one and twofamily dwellings. A good tool for thickness design with various nonuniform loads is concrete floors on ground, published by portland cement association farny. 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.
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. Concrete strength, f c 4000 psi instructions for use of figure 3. Pca 1002007, prescriptive design of exterior concrete walls. Before casting slab on grade, the earth is excavated up to the required depth and compacted to expel air voids. 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. P c a s charts and tables allow slab thickness selection for dual. 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. Voids were not provided beneath the grade beams above the expansive foundation soil, and joints were not made in the walls and grade beams. The slab on ground is in direct contact with the typical draining layer such as a gravel, sand or a. After this publication, it was subsequently adopted by the uniform building. Design new and investigate existing reinforced concrete beams, standard and wide module joists, and oneway slab systems. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor.
The re f e rences cited after each method discuss the design process in detail. Slab thickness design for industrial concrete floors on grade is195. Stresses in floor slabs on grade resulting from vehicular loads a re a function. Pca aci design guide beam and one way slab analysis and. The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. A3 design examples using coe charts a4 slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l.
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. Design the design procedure is based on circular concrete tanks without prestressing 1993 developed by the portland cement associations pca and complies with the building code requirements for structural concrete, aci318. This publication is intended solely for use by professional. Aci 360, design of slabs on grade, refers to this as a type b slab. Concrete slabs on grade are a very common type of concrete construction. Batters are marked and placed in position as per plan before concrete pour. Also, design charts from the portland cement association pca are included to provide an additional method for determiningchecking required slab thickness for flexure.
Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. And then, soil investigation is done to design the thickness of the slab. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. This con sensus standard was developed by the pcas national standards development committee committee that operates under pcas american national standards. The pca and wri slab on grade design methods for industrial floors led to a design for concrete fatigue, even though 2. P c a s charts and tables allow slab thickness selection for dual and singlewheel axle. A new method for designing floor slabs on grade due to the. Joint spacing for concrete structures bureau of reclamation. Development of the design approach the primary design issues for stiffened slabs on grade are the sizing of the beams that stiffened the slab and the. Slab thickness design for industrial concrete floors on grade.
Pca slab thickness design for industrial concrete floors on grade free download as pdf file. The author of this engineering bulletin is robert g. Flat slab analysis, design and detailing pdf civil. The quality of a completed floor slab is dependent on. The portland cement association pca, founded in 1916, is the premier policy, research, education, and market intelligence organization serving americas cement manufacturers. Per pca slab thickness design for industrial concrete floors on grade. This is the first edition of the portland cement association s pca prescriptive design of exterior concrete walls for one and twofamily dwellings. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Appendix 1 design examples using portland cement association method. The construction and design of concrete slabs on grade d.
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