Sponsored by the task committee on lift slab construction of the technical council on forensic engineering of asce. A new simplified procedure to estimate loads on slabs and. Introduction concrete slabs on grade are a very common type of concrete construction. It serves as a walking surface but may also serve as a load bearing member, as in slab homes. The slab is reinforced with concrete rods and mesh that helps keep a cohesive bond along such a large surface. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. The attached excerpted resource materials have been made. Singh central building research institute, roorkee, india abstract flyash is a major industrial waste which pollutes the atmosphere. Slabongrade construction technical guide deciding to build your home with a slabongrade 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 by replacing concrete with lowerimpact and better. This problem is designed to demonstrate how to check the ability of a composite slab to carry a 3000 lb point load over an area of 4. Lift slab construction 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, so being cheaper and faster as not requiring boxing and supports for casting in situ.
A lift slab building of seria kub under construction whe report 39, kyrgyzstan figure 11. Slab construction is a concrete contractor that provides concrete cutting, cement finishing and more. State of wisconsin, department of transportation standard specifications for highway. It is said that a house built upon the rock will endure, this is your rock. It is applicable to the construction of normalweight and structural lightweight concrete floors and slabs made with conventional portland and blended cements. Finals architects floor plans construction positivity youtube youtubers final exams building homes final lift slab construction understanding final lift slab construction in detail please subscribe and like if you find the material helpful feel free to comment if you want any informat. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete.
Market for posttensioning tendons over 40% of all pt tendons sold in the usa are for residential foundations. Flat slab types of flat slab design and its advantages flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Technological aspects of liftslab method in highrisebuilding construction. Feb 24, 2015 this pin was discovered by cariann davitt schartow. Slab construction 1 roll out the slab to approximately ikinch with a rolling pin using guide sticks to assure even thick ness. Girder slab technologies, llc 3 myers drive suite 10 mullica hill, nj 08062 phone. Theoretical concepts, practical applications, basis of design, and design procedures for heavy. The strip may have up to 20 spans and may have cantilevers at the ends. The pouring of the slab is a critical step for your new home.
Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Asce, secb course content slab on grades construction. In 1987, the collapse of ambiance plaza in bridgeport, connecticut, demonstrated the need to reevaluate the engineering of lift slab construction and determine what is needed to make it safe. Lift slab construction is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising. Lift slab structures are one of the most efficient and.
Ba s i c a l l y, the method entails casting floor and ro o f slabs on or at ground level and jacking them up into po. Guide for concrete floor and slab construction aci 302. Most ancient cultures gravitated to the pottery wheel for the creation of vessels. A new simplified procedure to estimate loads on slabs and shoring during the construction of multistorey buildings article in engineering structures 335. Building a wellmade slab foundation will determine the longevity of your project and potentially the stability of your home or other structure. The benefits of using insitu concrete flat slab construction should be investigated at the conceptual design stage. Liftslab technology the principle of lifting the load youtube. Usually, the construction is flat plate, and the slabs have uniform thickness. A parting compound between the slabs prevents bonding.
This type of precast construction is known as seria kub. Engineering considerations for liftslab construction asce library. A slab foundation functions as a base for new homes, garages, sheds, gazebos, and other construction projects. Liftslab construction building construction britannica.
Slick, resulting in what came to be known as the youtzslick lift slab method of construction. Concrete is good in taking compression and steel is good in tension. Its necessary to check the slab deflection for all load cases both for short and long term basis. 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. Successive levels are then cast on top of the previous slab and raised to their respective positions with hydraulic jacks. Reported by committee 302 american concrete institute. A flat piece of concrete, put on the walls or columns of a structure. Liftslab construction concrete construction magazine. Some very skilled laborers poured this slab, and the garage slab in a single day. Liftslab construction is a method of construction where the concrete floors and roof slabs are cast atop one another at ground level and then are lifted into their. Although the first patent for lift slab construction was given to slick in 1955, the method of construction is commonly referred to as the youtzslick method. The lift slab method of construction involves casting posttensioned floor slabs on the ground and then lifting them into place. Special lifting collars or shearheads are provided in the slabs at the columns. Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures.
Lift slab construction has been used since the 1950s and, under certain conditions, is an economical method for the construction of multistory buildings. Flat slab seminar report, ppt, pdf for civil engineering. Many foundations utilize post tension cables, while others are reinforced with. The slab may be supported by walls, by reinforced concrete beams usually cast monolithically wit. The lift slab method was fatefully implemented in the lambiance plaza development in bridgeport, connecticut. Lift slab ppt elevator column free 30day trial scribd.
Lift slab construction, technique whereby concrete floor slabs are poured on the ground, one on top of the other, and then lifted into place on top of columns by hydraulic jacks. Slab building techniques were used extensively by mesoamerican precolumbian potters with some beautiful results. Lift slab definition is of, relating to, or being a method of concrete building construction in which floor and horizontal roof slabs are cast one on top of the other usually at ground level and then lifted to their proper heights after the concrete has developed the necessary strength. Filler slab technology is a simple and a very innovative technology for a slab construction. What are the 16 different types of slabs in construction. In general, under full service load, deflection d sep 07, 2016 lift form slab construction submitted by name neeru hooda b. Different types of slabs in construction civil snapshot. Heavy loads in building s such as warehouses include moving load s, stationary live loads, and wall loads. May 22, 2017 if you are interested in this kind of video explainers visit us at construction lifting slabs new. If these are not available, use a bat or board covered in sturdy canvas. Article pdf available january 2018 with 833 reads how we measure reads. Flat slabs may have drop panels at columns and columns may have capitals.
The big advantage of erecting concrete buildings using lift slab construction is elimination of most formwork, an especially important factor in areas where labor costs are. May 02, 2017 lift slab construction 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, so. Number each of the steps starting from the lowest 2. A slab foundation is a large, thick slab of concrete that is typically 46 thick in the center and poured directly on the ground all at one time. This method of construction simultaneously began development in 1948 by both philip n.
Liftslab construction is a precast method of construction of slab on the ground and then lifting it to the structure. The lift slab method involves the erection of steel columns supported on concrete footings and piers. Consider not only the benefits in terms of potential design efficiencies but also the major advantages for the overall construction process, notably in simplifying the installation of services and the savings in construction time. After the slabs have cured long enough to reach a prescribed strength, powerful hydraulic jacks mounted on top of the columns lift the slabs into their respective positions. Used for very tall multistory buildings, this method offers substantial savings in formwork.
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. Basically, this method involves the continuous placing of concrete in a shallow mould having the same plan as the building to be constructed. Introduction slip form construction, or continuously formed construction, is a construction method in which concrete is poured into a continuously moving form. Department of mechanics, materials and structures english. This is a system that involves placing the foundation, erecting columns with special lifting collars, constructing slabs one on top of the other on the ground, lifting the slabs to their respective positions with hydraulic jacks located on top of the columns, and finally connecting the slabs to the columns by the collar device. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems.
Construct forms around the well, and monolithically pour the concrete on the thoroughly compacted earth. Lift slab construction elevator concrete free 30day. If you are interested in this kind of video explainers visit us at construction lifting slabs new. Liftslab construction, technique whereby concrete floor slabs are poured on the ground, one on top of the other, and then lifted into place on top of columns by hydraulic jacks. The construction and design of concrete slabs on grade. A rc filler slab with nonautoclaved cellular concrete blocks. Liftslab construction article about liftslab construction. The edges of the slab are thicker as wide as 24 in order to allow for extra strength around the perimeter.
Analyze and design flat slab or waffle slab floors. Engineering considerations for liftslab construction books. A rc filler slab with nonautoclaved cellular concrete blocks for sustainable construction m. Flat slab types of flat slab design and its advantages. Well slab construction the following method of well slab construction is acceptable for most wells. Such plans and designs shall be implemented by the employer and shall include detailed instructions and sketches indicating the prescribed method of erection. Homebuyers appreciate features of a raised foundation a front porch, screened back. Pdf technological aspects of liftslab method in highrisebuilding. Lift slab construction is a method of constructing concrete buildings by casting the floor or roof.
A concrete construction primer on what it takes to build concrete slabs from proper subgrade preparation to adequate curing. With such a wide range of purposes and support requirements, concrete slabs present many construction variables. These slabs of concrete are then lifted to their designated, designed elevations. Eps geofoam is approximately 1% the weight of soil and less than 10% the weight of other lightweight fill alternatives. New developments in lift slab construction concrete construction. 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. How are slabs poured in the home construction process. Through the years we followed the progress of this method where all of the floor slabs are cast at ground level one atop the other, then raised as a group and dropped off one by one. Pdf the utilization efficiency of slab lifting technology for highrisebuilding construction is regarded in the present article.
This guide presents information relative to the construction of slab onground and suspended slab floors for industrial, commercial, and institutional buildings. Concrete slabs are used to support everything from patio furniture, to foot traffic, to semitrailer trucks. Aci 360, design of slabsongrade, refers to this as a type b slab. Lift slab construction casting floor and roof slabs one upon another, then jacking or hoisting them into final position, saving on formwork for castinplace floors in a multistory structure. Flat plate floors are commonly used because they are so well suited to stackcasting, req u i r ing form w o r k at only the edges of the slab and at floor openings. What was set to be a 16storey residential project suddenly collapsed on april 23, 1987, killing 28 construction workers. New developments in lift slab construction concrete. 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. Concrete construction how to build high quality slabs on. Engineering considerations for liftslab construction.
A type of precasting used in building construction involves casting floor and roof slabs at or near ground level and lifting them to their final position, hence the name liftslab construction. Theoretical concepts, practi cal applications, basis of. The construction and design of concrete slabs on grade d. The traditional lift slab construction sequence is i l l u s t r ated in fi g u r e 1. Types of construction loads on composite slabs and calculation. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Used for very tall multistory buildings, this method offers substantial savings in. Flat slab is defined as one sided or twosided support system with sheer load of the slab being concentrated on the supporting columns and a square slab called drop panels. Construct the slab of reinforced concrete using rebar or steel mesh.
A reinforced concrete slab is the one of the most important component in a building. Heavy loads in buildings such as warehouses include moving loads, stationary live loads, and wall loads. Different types of slabs in construction december 25, 2017 january 26, 2018 by kathir 2 comments. Lift slab, refers to a method of construction of multi story structures, that involves the placement of several concrete slabs on the ground. Other than these potters, though, slab pots were only minor players in the handbuilding playing field of other ancient cultures across the globe. To build such a foundation, one needs to have at least a basic construction skill set. The use of eps geofoam under the slab helps keep vertical settlements down as the contractor can balance the excavation and depth of foam to keep the net increase in pressure under control. Pdf technological aspects of liftslab method in high. Lift slab definition what does lift slab mean in construction. The reason why, concrete and steel are used together to construct rcc slab, is in their individual properties as separate building materials and their individual limitation. Lift slab construction was a revolutionary idea invented and developed in the early 1950s by a collaboration of philip n.
Plan of a typical lift slab building whe report 39, seria kub, kyrgyzstan caucasian region of russia, etc. This problem is consistent with the requirements of the 2006 international building code for garages storing vehicles accommodating not more than nine passengers. In may 1958 concrete construction covered a project that used the lift slab method of raising floors, first introduced in 1950. The construction loads on the composite slab during concreting is composed of the weight of worker, fresh concrete, pipelines, formworks and load bearing elements, weight of small equipments, and impact. Lengthy concrete slab delays due to poor weather, timeconsuming forming and curing, trade scheduling problems, extra inspections, or hauling and compacting of fill dirt can be avoided with raised wood floor foundations. These plans and designs shall also include provisions for ensuring lateral stability of. Work on plaster board sheet rock, drywall board to keep the slabs flat and to absorb the moisture in the clay. Lift slab system elevator prestressed concrete scribd.