As it is the first time a tower of this height is attempted, a combination of several. It emphasizes such aspects of construction as site preparation, concrete materials, concrete mixture proportions, concrete workmanship, joint construction, load transfer across joints, form strip. The house is be located in iporanga, a condominium for beach houses on guaruja, sao paulos coast city, approximately 120km east. The common types of failure modes in composite slabs are flexural failure, shear failure and combination of flexuralshear failure mechanism. Determine if vegetation, topsoil and foreign material have been removed from within the foundation walls where the slab is to be placed. Building code requirements for structural concrete aci 31811 and commentary first printing august 2011 isbn 9780870317446 american concrete institute. The potential for damage from frost will also be reduced. The design of slabs on ground should conform to the recommendations of aci 360r. The stem wall supports the building loads and in turn is supported directly by the soil or a footing. Tied, tongue and groove, handtooled, longitudinal pavement construction joint. In most cases, the slab thickness is designed as an unreinforced concrete section. Guaeca is a 15story highrise building in sao paulo, sao paulo, brazil. It allows to take advantage of usable floor area of the structure free layout. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2.
For uniformly distributed loads of w per square foot of the slab, each strip acts approximately like a simple beam uniformly loaded by its share of w. Construction, contraction, expansion, isolation, hinge. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. However, no matter how basic or complex the floor is, the construction method is similar and includes. Introduction concrete slabs on grade are a very common type of concrete construction. Formed suspended slabs, before removal of supporting shores 34 in. Load transfer in a oneway slab, b twoway slab nilson fig. Over excavation should be provided with src 20 concrete to the required level. Guide for concrete floor and slab construction aci 302. Properties of the surface are determined by the mixture proportions and the quality of the concreting and jointing operations. The slab is without drops and is supported internally and on the external long sides by square columns.
The familiar term, control joint, is not included in this list of joint terminology, since it does not have a unique and universal meaning. Floor slab design floors are designed as slabs on grade. Download from so many useful civil engineering files for free. Various types of slabs 1 choice of type of slab floor the choice of type of slab for a particular floor depends on many factors. Reported by committee 302 american concrete institute. When the ratio of the longer to the shorter side l s of the slab is at least equal to 2. Jan 06, 2014 slab ongrade construction technical guide deciding to build your home with a slab ongrade foundation instead of a conventional basement or raised crawlspace foundation can greatly reduce your environmental impact during construction, and has the potential to offer significant financial savings as well. The construction and design of concrete slabs on grade. Common work results for concrete concrete download free cad blocks, autocad drawings and details for all building products in dwg and pdf formats. Crcm manual 4 crcm means concrete rib construction method, the word method, can create confusion, because the icc ibc uses such word in the section 1701. The quality of a concrete floor or slab is highly dependent on achieving a hard and durable surface that is flat, relatively free of cracks, and at the proper grade. Pdf guide for concrete floor and slab construction mahmut.
The slab thickness depends on the type of loads on the floor slab. A civil engineer must know all the aspects regarding the flat floor system. The analysis of slab and beam floor with prestressed wire. Common practice of design and construction is to support the slabs by beams and support the beams by columns. A slab on grade with an independent stem wall is a concrete floor supported by the soil independently of the rest of the building. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. The construction of this 828 m tall, reinforced concrete tower structure, broke several records during its construction. However, no matter how basic or complex the floor is, the construction method is similar and. This complete construction schedule starts with the stem wall and slab foundation and takes you through interior and exterior finishes to the final inspection. Pilesupported slabs 101 dl introduction 101 d2 alternative design approaches 101 d3 structural analysis 101 d4 section analysis 101 d4. Flat slab analysis, design and detailing pdf civil engineering. Monolithic foundation detail us 100 third street castle rock, colorado 80104 303. Develop and report on criteria for design of slabs on grade, except highway and airport pavements 1.
Flat slab system is an important division of concrete floor system. Both slab on grade and structural slabs can be created using this formwork. We specialize in form work, retaining walls, fencing drive ways and side walks free quotes available on request. Ordinarily cfa piles would ensure excavation stability however, the use. If areas have been filled, then verify that the fill is free of vegetation. The intermediate slab stress and strain condition of the construction in question and. Reinforcing is added to control shrinkage cracking and maximize the distance between designed joints. Avoid slab ongrade construction techniques for agricultural buildings, feed bins, fan pads, and feed. Over the past two decades the idea of pouring concrete over cupolex permanent void forms has become an increasingly popular slab foundation method. Pdf composite floor slab design and construction researchgate. Prevent their entry by extending the foundation walls at least 36 inches below ground. Slabs are usually used in floor and roof construction.
If prefabricated drophead shores for slab formwork systems are used, the shores can become the reshores if a large area of shoring is unloaded, permitting. Concrete floor slabs on ground 15 types of floor construction 15 basic requirements 15 combined slab and foundation 15. Bevel the triangular cutouts so that when overlapped, they lay flush. Pt slab is typically 30% thinner longterm creep problems are virtually eliminated by load balancing moment of inertia approaches igross the slab can be stressed and the forms removed in 23 days the 21 to 28 day shoring time for rebar concrete does not apply to pt flexibility in column layout large cantilevers. Even with the best slab designs and proper construction, however, it is unrealistic to expect crackfree and curlfree floors.
Machine spraying is preferable, but manual spraying. The imposed loading on the floor is 5 knm2 and an allowance of 2. Applies to the construction of normalweight and structural lightweight concrete floors and slabs made with conventional portland and blended cements. This guide presents good practices for the construction of foundations, footings, walls, and exterior and interior slabs ongrade. Slab cast integrally with a series of closely spaced joist which in turn are supported by a set of beams.
Economy of construction is obviously an important consideration, but this is a qualitative argument until. Designed as a series of parallel tbeams and economical for medium spans with light to medium live loads. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Manual for the design of reinforced concrete building. Prestressed concrete construction manual 3rd edition. A crack inducer grid is used to induce a closely spaced network of fine cracks throughout the entire area of the slab that do not need to be reflected through applied floor finishes.
The minimum reinforced concrete footing thickness will be 6 inches or 112 times the length of the footing projection from the foundation wall, whichever is greater. Pdf in the recent trends emerging day by day in the construction. Concrete slabs on grade are a very common type of concrete construction. Identifies the various classes of floors based on use, construction design details, necessary site preparation, concrete type, and other related materials. But crcm uses concrete a material used more than 3,000. Joint free slabs is an innovative method for the construction of vast areas of slab on grade without the traditional formed and sawn shrinkage control joints. Guide to residential castinplace concrete construction reported by aci committee 332 reapproved 1999 the quality of residential concrete is highly dependent on the qualify of job construction practices. The analysis and design follow the equivalent frame analysis method of the aci code, which considers a onebay wide strip of the floor system as a continuous frame. Refer to aci 223 for special procedures recommended for the design and construction of shrinkagecompensating concrete slabs on.
This guide describes how to produce highquality concrete slabs onground and suspended floors for various classes of service. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Economy of construction is obviously an important consideration, but this is a qualitative argument until specific cases are discussed, and is a geographical variable. Flat slab analysis and design free version download for pc. Layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls in one direction ns. Structural design of a reinforced concrete residential. Pdf guide for concrete floor and slab construction. View a detailed profile of the structure 265966 including further data and descriptions in the emporis database. Tolerances for concrete construction tolerances for concrete. The method of piling construction adopted must ensure that stability of the pile excavations is maintained at all times. Tolerances for concrete construction tolerances for. Although, building construction requires lots of time and is tedious work, yet its result is a permanent asset for us. Another hand building bowl template that makes working with your clay slab a bit simpler.
Pt slab is typically 30% thinner longterm creep problems are virtually eliminated by load balancing moment of inertia approaches igross the slab can be stressed and the forms removed in 23 days the 21 to 28 day shoring time for rebar concrete does not apply to pt. Pdf composite slab systems were first developed in the late 1930s for. Common work results for concrete arcat free building. Choice of type of slab floor the choice of type of slab for a particular floor depends on many factors. Flat slab analysis, design and detailing pdf civil. Tm 580912 concrete floor slabs on grade subjected to. Masonry construction for crawl spaces 11 sill plate anchors 11 reinforcing in poured walls 11 masonry veneer over frame walls 12 notch for wood beams 12 protection against termites 12 chapter 4. It was presented on 6th march, 2014 as part of slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The surface of the base slab should have a rough, open pore finish and be free of any substances that would interfere with the bond of the topping to the base. Even with the best floor designs and proper construction, it is unrealistic to expect crackfree and curlfree floors.
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