Pdf in a developing country like india the benefits of posttensioning system are yet to be recognized. In this article, ill give a detailed explanation of each slab where to use particular slab. Cip 4 cracking concrete surfaces what are some forms of cracks. Consequently, every owner should be advised by both the designer and contractor that it is completely normal to expect some amount of. In reality, sandwich slabs are ribbed slabs with a slab placed both to their upper and lower surface. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. The common types of failure modes in composite slabs are flexural failure, shear failure and combination of flexuralshear failure mechanism. Develop and report on criteria for design of slabs on grade, except highway and airport pavements 1. There are 16 different types of slabs in construction.
If the topsoil is scraped away, then the undisturbed soil below will usually. Requirements for monolithic slab construction hunker. Flat slab system is an important division of concrete floor system. The concrete slab construction swms is a comprehensive safe work procedure that covers all safety requirements to be carried out while carrying out operations. Posttensioned slabcolumn connection whe report 68, serbia and montenegro poured on the ground in forms, one on top of the other, as shown in figure 11. A floor slab in a building where stability is provided by shear walls in one direction ns. 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. Floating slab, as the name tells it resembles a plate that is simply laid over water, with no kind of connection between them. Tolerances for concrete construction and materials shall conform to all requirements of aci 117, standard specifications for tolerances for concrete construction and materials, published by the american concrete institute, detroit, michigan, except as modified by the requirements of these contract documents. Flat slab seminar report, ppt, pdf for civil engineering. Megalito slab is a display font of geometric construction, very vertical, with extra condensed proportion for the creation of large titles with significant savings in horizontal space, it has an extended character table 805 glyphs that includes small letters, 7 numeral sets, fractions dynamics with numbers and letters, collection of currency symbols, ligatures, alternative letters.
If the area has been filled, the footings should always extend through to undisturbed soil. Guide for concrete floor and slab construction aci 302. A polyethylene sheet is placed over the slab prior to placing the pavement or approach slab. Cracks can occur when provisions to accommodate these movements are not made in design and construction. This course will addresses the following foundation types. Also explore the seminar topics paper on flat slab with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016.
Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Shorter construction time flat plate design will facilitate the use of. The objective of the present report is to summarize the experience available today in the field of posttensioning in building construction and in particular to discuss the design and construction of posttensioned slab structures, especially posttensioned flat. Foreword 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 and elevation. 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. An internal knowledge base and wiki for distributed teams. After a thorough research, i have handpicked some of the hundreds of templates and thought that it could be equally useful in your life if shared. This method of construction allows for a large portion of the work to be completed at ground level, negating the need to form floor work in place. Waffle slab grid slab it is a type of reinforced concrete slab that contains square grids with deep sides. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. A civil engineer must know all the aspects regarding the flat floor system. Handbook on good building, design and construction in the.
The design of slabs on ground should conform to the recommendations of aci 360r. Concrete, like other construction materials, contracts and expands with changes in moisture and temperature, and deflects depending on load and support conditions. Prefabricated concrete slabs are built in a factory and transported to the site, ready to be lowered into place between steel or concrete beams. The sleeper slab is finished smooth and allowed to cure. This condition occur if the slab supported by two side of beam or walls. The slab may be supported by walls, by reinforced concrete beams usually cast monolithically with the slab, by structural steel beams, by columns, or by the ground. The basic requirements for the construction of a monolithic slab include proper site preparation and reinforcement of the concrete. Slab is one of the most famous part of a construction project. Floating slab construction applications and advantages floating slabs are concrete slabs that are laying over the ground, without any kind of anchoring, as if it simply sits on it and floats.
Guide to concrete floor and slab construction kindle edition. Some of them are outdated and many of them are frequently used everywhere. Concrete pavement design, construction, and performance. Slab are considered as oneway if the main reinforcement is designed only in one direction. Even with the best floor designs and proper construction, it is unrealistic to expect completely crack and curlfree floors. Economy of construction is obviously an important consideration, but this is a qualitative argument until specific cases are discussed, and is a geographical variable. Waffle slab construction process includes fixing forms, placement of pods on shuttering. Floating slab construction applications and advantages.
Aci 360r pdf guide to design of concrete slab foundation. It depends upon the many factors, but personally i will go for the ppc because of the following factors. Pdf in the recent trends emerging day by day in the construction. Concrete slab types construction, cost, and applications. Consequently, every owner should be advised by both the. Flat slab analysis, design and detailing pdf civil. Even with the best slab designs and proper construction, however, it is unrealistic to expect crackfree and curlfree floors. The depth of a slab is usually very small compared to its span. However, to provide this efficient wood house, good construction. Flat slab analysis and design free version download for pc. Refer to aci 223 for special procedures recommended for the design and construction of shrinkagecompensating concrete slabs on. Technical note 5 slab does not adequately represent the mechanical properties of a stemmed floor system for analysis and design.
The soil beneath the slab must be compacted and not contain any organic matter. Every owner should be advised by the designer and contractor that it is normal to expect some cracking and curling on. Concrete floor slab construction process includes erection of formwork, placement of reinforcement, pouring, compacting and finishing concrete and lastly removal of formwork and curing of concrete slab. Properties of the surface are determined by the mixture. If slab supported by four side of beams or walls, the slab is considered oneway if ratio of long span ly to short span lx greater than 2. Concrete slab construction swms bluesafe solutions. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place.
Pdf method statement for construction of civil works. This sheet is a bond breaker, allowing the pavement and approach slab to move freely over the sleeper slab as they expand and contract. One of the most comprehensive resources available for designers, contractors and facility owners that can help them avoid potential debacles during concrete floor construction is the american concrete institute aci guide to floor and slab construction. They may be supported on two opposite sides only fig.
Every document is prefilled and editable, which means all the main safety aspects have already been filled in for you. Even with the best floor designs and proper construction, it is unrealistic to expect crackfree and curlfree floors. Even with the best slab designs and proper construction, it is unrealistic to expect crackfree and curlfree floors. A concrete slab may be prefabricated, or constructed on site. Layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls in one direction ns. Oneway and twoway slabs university of asia pacific. This handbook on good building design and construction in the philippines does exactly that, capturing the potential of increased resilience through good construction. Download two way slab design excel sheet template for free. Sandwich slabs may have the disadvantage of a larger weight compared to the ribbed ones but on the other hand, they have the advantage that their spans and supports behave in the same proper way. When a rectangular slab is supported on all the sides and the lengthtobreadth ratio is less than two, it is considered to be a twoway slab. In regions of low and moderate seismic risk such as zones i and 2 as defined in ans i a.
The unisdr secretariat is supporting the development and distribution of tools like this handbook, as a part of its mandate for coordinating the. Explore flat slab with free download of seminar report and ppt in pdf and doc format. The structural modeling used in most commercially available software, where stems are considered as disjointed from the topping slab does not deliver the advantages associated with waffleslab slab construction. Lift slab construction also called the youtzslick method is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising jacking the slab up with hydraulic jacks. Pdf guide for concrete floor and slab construction.
Waffle slab construction process includes fixing forms, placement of pods on shuttering, installation of reinforcement between pods, installation of steel mesh on top of pods, and pouring of concrete. A nonreinforced slab is twoway if it is supported in both horizontal axes. Columns and deck not designed to resist longitudinal bending very flexible. Best practices guidelines for concrete construction. No beam, free layout and large windows create bright and open spaces in flat slab floors. Oneway and twoway slabs oneway slabs transfer the imposed. Pdf effects of halfprecast concrete slab system on. In car parks and other open structures, prefinished soffits offer a maintenance free solution. A foundation in residential construction may consist of a footing, wall, slab, pier, pile, or a combination of these elements. These materials are originally located at different websites. A slab on grade with an independent stem wall is a concrete floor supported by the soil.
Employee write up form i have faced the similar issue while searching some free work order template formats online such as employee time sheet. A reinforced concrete slab is a crucial structural element and is used to provide flat surfacesfloors. Even with the best floor designs and proper construction, it is unrealistic to expect completely crackfree and curlfree results. Heavy arch ribs designed to resist axial force and bending.