The good news is that you won't have to provide much in the way of maintenance. As a result, falling or slipping on a concrete floor can be extremely painful and carries a higher risk of injury when compared with alternative materials. link to What Tools Do You Need To Renovate A House? Foam concrete contains confined air pockets thus reducing its weight substantially which offers great reduction in floor cost. Is Quikrete as Strong as Regular Concrete? 15/11/2008. Lastly, its important to remember that you still need to consult a contractor/engineer for this type of project. Another benefit of concrete is that its quite versatile in finishing options. Another advantage of using concrete flooring on the second story of your home is the design and shape options available. For that reason, knowing the thickness of the concrete slab is critical. Still, the thicker the layer is, the stronger the concrete floor. As a result, some people choose to install a thin layer of concrete flooring or forego the material altogether. If you are unsure of the future use of your garage floor, it is good practice to pour a thicker layer of concrete than you currently need. The important thing for contractors is to start the project with a clear idea of what the owner or specifier really wants and what you will have to do to accomplish that. What Tools Do You Need To Renovate A House? Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. Low rise building comprises of 1 storey, 2 storey, 3 storey, 4 storey and 5 storey building. The ACI Code permits thinner slabs to be used if calculated deflection is within the specified deflection limitations. Generally, concrete second floors for residential homes are around 0.2 0.4 meters thick. Concrete Questions also participates in affiliate programs with Clickbank, CJ, ShareASale, and other sites. Drawings include: Two-Way Concrete Flat Slab Floor System plan, section, isometric. Determine the thickness of slab for 1/ 2/ 3/ 4/ 5 storey building, concrete floor structure first you should to figure out total load ,what kind of concrete slab you have needed, it is concentrated load or spread load all over the slab, there is a different rules for finding the thickness of slab for low rise building structure. Four months after the floor was placed, 10 cores were drilled, measured, and tested in compression. supported slabs; L/24 for slabs with one end continuous; L/28 for slabs with both It is only when a space will see constant traffic from much heavier vehicles that a concrete slab of more than six inches would be . Some parking lots that see seasonal or light use are only four inches thick. Related article: Are Concrete Floors Bad for Dogs? Concrete slabs can be onground, suspended, or a mix of both. These documents are agreed upon and signed between the builder and the client. Slab thickness tolerances has long been a point of contention between contractors and specifiers. . the design even if the thickness is selected based on deflection requirements. Depending on how much weight the slab will hold, your budget, and local building codes, concrete slabs can be up . This particular slab was cast to support a timber stud structure and a 75 mm-thick slab was laid on well-compacted fill. Floor to Floor Height: 10'-16' | 3.05-4.88 m::: Properties. Not installing joints opens the door to potential litigation in addition to We were all set to start when the testing lab's field tech stopped the pour. LIFT MODELS. Sorry, you do not have permission to ask a question, You must log in to ask a question. Perhaps concretes greatest asset is also its greatest downside. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'whatblueprint_com-large-leaderboard-2','ezslot_6',113,'0','0'])};__ez_fad_position('div-gpt-ad-whatblueprint_com-large-leaderboard-2-0');It helps to be specific and have an idea of what you want out of your new second floor, whether a swimming pool, a dining room, or a cantilevered viewing deck. viewfloor 4 mins ago No Comments. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Concrete flooring is sustainable, durable, aesthetically pleasing, versatile, and good value for money. In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design. The actual average cylinder strength for the floor concrete was 3630 psi. High rise building includes multi- stories like 10 storey, 20 storey and apartment. The thickness of the slab should be at least 75 mm. Suitable for spans of 7m . Generally, the slab thickness is chosen to prevent excessive deflection in service. appropriate curing; employing a curing membrane . Labour costs are excluded and are worked out per quote with your contractor. This wood sheeting, which should also be stronger than average, will act as a subfloor. Minimum aging of new concrete slab: 28 days (cure time) Minimum thickness of concrete slab: See new slab table & figures below. Uncategorized. The minimum RCC beam size should not be less than 9 9 or 225mm 225mm with the addition of a 125mm slab thickness. Drop Panel Depth:.25 x Slab Thickness. This is one of the types of concrete slabs. Usually one way slabs and cantilever slabs will have more depth than two way slabs. using some basic thumb rules, regulation and guideline as per ACI code and IS code 456:2000, for concrete floor, concrete slab thickness for Apartment/ high rise building The floor slab is a reinforced concrete slab which thickness is near about 5-6cm. It is mainly designed for making filling and levelling layers of floors in industrial buildings and other civic structures 3. These values can be used provided the slabs are not supporting or attached to partitions or other structures liable to be damaged by large deflections. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. This may be counterproductive because the weight of the slab may increase shear force significantly. A concrete floor on the second story should ideally be 4-6 in (10.16 - 15.24 cm) thick. Calculate design shear strength of the slab, equation 3. ends continuous; and L/10 for cantilevers; where L is the span. First Name. For a 121.1C (250F) temperature rise, a 76.2 mm (3-1/2 inch) thick slab gives a 1-hour fire rating, a 127mm (5-in) slab offers a 2-hour fire rating, and a 152.4mm (6-1/4 inch) slab provides a 3-hour fire rating. Why Do Some Concrete Walls Have Holes in Them. You can put concrete floors over wood because it needs support to remain in place. You can easily overlay wood, tile, masonry, or even smoother concrete over your floor. Welded plate girders, latticed girders, and vierendeel girders are also used. As a result, in some homes, concrete flooring may not be possible upstairs if there is poor structural support in place. requirements is not frequent. Concrete lasts for a long time with little to no maintenance cost. c . - Ceiling: Metal Furring Ceiling System = 0.10kPa. Adding additional floors to a home can be quite a headache because of everything that needs to be considered, such as materials. Fortunately, the ever-dynamic nature makes the material eco-friendly and safe for use at home. The slab section is helps to transfer the loading condition from various forces to beam and through that it will transfer to columns and finally to the foundation section. With more than 20 years of experience in the industry, I am absolutely thrilled and privileged to share my knowledge and experience with everyone through this blog. When you join you get additional benefits. As a result, you can save a lot of money over time and cut back on the expenses that you would otherwise have to spend on repairs, replacements, and maintenance involved in other varieties of flooring. Email: info@alphapaving.com. Lastly, if you choose to create a new slab(enough to fit in a new room) on a second floor youll also have to construct a new foundation and columns to support the upper level. For example, one-way slab thickness calculation is different and easier from that of two-way slab. What are the different types of handrails used in bridges? As a result, concrete floors are often thinner on higher stories. This test is called "the relative humidity test using in situ probes," and it's the basis for the ASTM F2170 standard. Therefore, using concrete flooring upstairs may be a poor idea if there are babies, young children, or older adults living in your home. For For slabs drying from two sides, the depth is 20% of the thickness. The tolerance states that no individual sample may be more than inch thinner than the specified thickness and the average of all samples can't be more than 3/8 inch thinner than specified. While concrete is a durable and long-lasting building material, it is prone to cracking or breaking. When accounting for joist width, subflooring, flooring and standard ceiling drywall, a floor framed with 2-by-10s will be very close to 11 1/4 inches thick. Methods used for finding slab thickness varies for different types of slabs. In some homes, it may not be possible to install concrete flooring on the second and third stories due to the lack of structural support. While concrete flooring may be more expensive than alternatives like laminate flooring, it is a highly cost-effective option. In addition to wood, concrete flooring may also be installed over tiled floors and concrete slabs that fit together. Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. In a typical home, the entire . The ACI 117-06 tolerance then is a simple average and a minimum thickness, both of which can certainly be achieved, although contractors should be aware of how much thicker to plan for the slab to be in order to make sure it is never more than inch thinner than specified. . Guest PostContact usPrivacy policySitemap, How much unit of sand required for 1000 sq ft house, How many shingles do i need for a 1010 shed, What size beam do I need for a 26 foot span, ( Red Brick Vs Fly ash Brick), (What is Fly ash Brick), ( Red Brick Vs Fly ash, (What is Fly ash Brick). Concrete flooring has numerous benefits, including longevity and aesthetics, but it is a heavy material that requires a sturdy structure to support it. The mould is supposed to be bigger than the floor since it includes walls, and the reinforcement bars are supposed to be attached to other structural members( such as column bars or beam bars). To overcome this issue, some people install thinner layers of concrete flooring. An exception to this would be for small to medium scale terraces. link to How To Install A Solid-Surface Backsplash, https://www.concreteconstruction.net/how-to/construction/concrete-floor-slabs_o, https://theconstructor.org/practical-guide/thickness-concrete-slab/29340/. You only need to keep your concrete floor clean. Join now! About Us Waffle slab can be used as both ceiling and floor slab. The good thing is that cracks can be filled in with fresh concrete and it will be as good as new, making concrete flooring cheap and easy to maintain. 22m3 R32000. Now nearly another decade has passed and there's still no generally accepted approach. Enjoy! In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design. Please enter your email address. this criterion the fire rating of a floor is the number of hours necessary for Roof Slab Thickness For 1 2 3 Or Multi Y House Civil Sir. Concrete slab thickness for 1, 2, 3, 4 & 5 storey building depends on material, Engineering, load acting on it and span, it need proper design, what kind of material should be used, concreting material, Steels and other materials resist environmental factor, good and sound floor slab should be needed. No drawings exist so we had the reinforcing located in the slab, then certain areas chipped out to reveal the rebar. The one caveat of concrete is that it can be quite expensive. Concrete slab thicknesses depend on the type of floor slab used in construction and the span of the slab. For high-traffic areas that expect to see large trucks pulling through, plan on 12 inches of concrete. One way or another, the design process usually consists of these 8 steps: Get details of the proposed loads, and figure out the worst case for which you have to design. Sometimes it can be 7 cm, depends on the cover of reinforcement. Building Guidelines Concrete Floors Slabs Riding trowels greatly speed up the finishing operation. For a 6-inch slab, therefore, you would set your forms for a 6-inch thick slab. If you are confusing with acting load it is light medium or heavy take the help of architectural engineer better to calculate and make design of floor slab according to the load and span of floor slab. The floor of one level of a home shares framing with the ceiling of the level below it. However, this figure assumes typical construction. This article explains how to avoid some fatal mistakes when installing radiant heat in a concrete floor slab by describing an incompetent radiant heat floor installation along with an explanation of why things went wrong and how to avoid these errors. thicknesses are controlled by the danger of heat transmission during fire. In most cases, however, six inches of concrete is a typical thickness that provides you with long-lasting support. The building will be near Lake Tahoe California, climate zone 6. The pouring and finishing process should only take a few days and once the concrete is dry, you can have your concrete floors polished or coated to match your interior design . The Advantages of Using Concrete Floors on the Second Floor, The Disadvantages of Using Concrete Floors on the Second Floor, How to Mix Large Quantities of Concrete (On the cheap!). This step is started after the bleedwater has evaporated and when the concrete is hard enough that footprints will be about -inch deep or less. The ASCC position statement, again, is a good tool to use in helping the owner, and specifier, make that decision. Other countries may use different minimums depending on their national standards. Oct 28, 2017 - Explore Stuart Smith's board "Second floor concrete slab" on Pinterest. And besides, many job specs will still be referencing ACI 117-90. There are approximately 54 square feet in a cubic yard of concrete at 6 inches thick. There are concrete products that can be poured to produce 6-inch-thick slabs for house foundations as well as products for thinner installations. Due to their relatively small size, residential buildings have a lot more leeway in terms of floor thickness than other building types. Search for jobs related to Second floor concrete slab thickness or hire on the world's largest freelancing marketplace with 20m+ jobs. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Patterns, designs, and textures can also be stamped into the concrete flooring when its wet. Installing the Concrete Floors. A crack in a slab of 1/8 inch or less is typically a normal shrinkage crack and not a cause for concern. Answer (1 of 9): Whether it is 2 storey or 10 storey, the thickness of the slab is based on the span and type of slab and not on the number of stories. The thickness of one-way slab is based on Deflection, Bending, Shear, and occasionally Fire resistance requirements. You can build a new slab and connect it to your older floor. The question now is how thick should your concrete second floor be? But do owners really want to pay for the extra concrete? By Cam Merritt Updated December 10, 2018. If the concrete is poured into a layer thinner than this, it will become more brittle, making it vulnerable to cracking or breaking. d: effective depth of the slab needed to withstand moment, b: width of the slab, 1m (12inch) slab strip is considered. Constructing a concrete slab costs around $4 $8 per square foot. However, as calculated, reinforcements can not be placed as precisely as calculate to maintain the gap between the bars as aggregate size + 5. Compute moments using suitable methods such as ACI Coefficient Method. Beam thickness more or less also stays within the 0.2 0.4 meter range, so youre main concern with hiding beams will be the additional costs of labour and materials. Thickness Of 2nd Floor Slab Wall. In his editorial in the June 2000 issue of CC, Ward Malisch begged the industry to come up with a method for determining compliance with slab thickness specifications, noting that nothing had happened in the previous decade since publication of an article by Luke Snell and Robert Rutledge (see A proposed method for determining compliance with floor thickness specifications, CC, January 1989). It will cost more up front, but I think in the long run it will be cheaper. 11m3 R16000. All Rights Reserved. The consent submitted will only be used for data processing originating from this website. Concrete weighs a lot. Concrete is a great material for this purpose as it is both easy to construct, affordable, durable, and versatile in its application. At CivilSir, we share all the information related to civil engineering. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'concretequestions_com-medrectangle-3','ezslot_2',134,'0','0'])};__ez_fad_position('div-gpt-ad-concretequestions_com-medrectangle-3-0'); You can have concrete floors on the second floor. A slab is defined as a member where the panel dimension is not less than 5 times the overall slab thickness. Read full affiliate disclaimer.Can You Have Concrete Floors on the Second Floor?if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'concretequestions_com-box-3','ezslot_4',133,'0','0'])};__ez_fad_position('div-gpt-ad-concretequestions_com-box-3-0'); Concrete is a durable, robust, and versatile building material. A concrete slab floor provides a simple way to add thermal mass to a design. R: flexural resistance (MPa) computed using the following expression: W: ultimate distributed load equal unless deflections are calculated Required thickness of concrete slabs. Here are the advantages of using concrete floors on the second floor: One of the advantages of choosing concrete for your upstairs flooring is the materials sustainability. Metal decking concrete slabs will normally use structural concrete. This method is applicable for different types of two-way slabs such as flat slab, flat plate, slabs on beams, slabs without interior beams. Eurocode 2 states minimum thickness for floor slabs in buildings is 125mm. How Thick Should a Concrete Floor on the Second Story Be? Thickness Of 2nd Floor Slab Wall. Guess the slab thickness needed to support the factored worst-case load. We now turn our boys to the task of preparing for the second story floor slab. 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Still, the thicker the layer is, the stronger the concrete floor. Minimum tensile strength of concrete: 4,000 PSI. You Can Follow me on Facebook and Subscribe our Youtube Channel, 1)what is concrete and its types and properties, 2) concrete quantity calculation for staircase and its formula. If your home does not have a sturdy support in place, the weight of a concrete floor may be too much and pose some serious structural problems. Floor Area (ft)=324 / Slab Thickness (in) (Metric) Floor area in square meters from 1 cubic meter of concrete for a given slab thickness. Not sure of concrete is quieter or noisier than a wooden . Rough concrete surfaces can also pose risks for scratches on the skin. Wood buildings can be loud and this is a common a solution. Beams are essential as they help redistribute a floors weight back to the ground. According to loading condition on concrete floor slab and their span, there is a choice to choose thickness of floor slab as proper design, but in this article using some basic thumb rules, regulation and guideline as per ACI code and IS code 456:2000 to find out minimum and standard thickness of concrete slab for commercial building. This the theoretical requirement for the thickness of the slab. Concrete floor systems are reinforced slab structures designed to satisfy a range of loading and span conditions in a building. The slab thickness chosen must be adequate for shear at both interior and exterior columns. 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