For slabs drying from two sides, the depth is 20% of the thickness. thicknesses are controlled by the danger of heat transmission during fire. Therefore, using concrete flooring upstairs may be a poor idea if there are babies, young children, or older adults living in your home. 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. 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. Concrete Slab Floor Thickness - Carpet Vidalondon. The floor slab is a reinforced concrete slab which thickness is near about 5-6cm. CA is one of the more restrictive states with construction and safety criteria that exceed the national norm. Its from those wants and ideas that the architect designs your house to fit you. Concrete lasts for a long time with little to no maintenance cost. link to What Tools Do You Need To Renovate A House? Concrete second floors can be installed as little as two inches (5.08 cm) thick. Concrete floors can be installed on the second floor as long as your house has sufficient support structures to carry the added weight of the material. For slabs drying from one side, the depth is 40% of the thickness. Sometimes, slab Minimum Size Of Concrete Slab Beam Column Lceted Institute For Civil Engineers. . 2205 Bell Avenue Des Moines, IA 50321 1-800-383-2181. This is an improvement over the 1990 version of ACI 117, which had a thickness tolerance of +3/8 inch, - inch. For most domestic garages, a six-inch slab of concrete will be sufficient. Phone: (512) 677-9001. For My crew had no problem accepting my mix generally 1-2-3, but I had many fights with them over how wet the fix should be. However, wood has to be at least in (1.9 cm) thick to provide the concrete with enough support to remain strong and stable. But perhaps there's hopeEldon Tipping is now chairman of ACI Committee 117 on Tolerances, and he is more familiar with this problem and its solution than anyone. Concrete slab thickness for 1, 2, 3, 4 & 5 storey building, Hi guys in this article we know about concrete floor slab thickness for 1 storey/G+0/one floor/ground floor building | slab thickness for 2 storey/G+1/two floor building | slab thickness for 3 storey/G+2/three floor building | slab thickness for 4 storey/G+3/four floor building | slab thickness for 5 storey/G+4/five floor building | slab thickness for 6 storey/G+5/six floor building | slab thickness for low rise building/ high rise/apartment building. Two-Way Flat Plate Concrete Floor System Analysis and Design . . Metal decking concrete slabs will normally use structural concrete. Building Guidelines Concrete Floors Slabs Concrete: Slab Thickness - Alpha Paving Industries | If you have more questions about Concrete: Slab Thickness or would like a free quote, fill out the online form or call (512) 677-9001. This is known as stamped concrete, and it offers homeowners nearly endless design options. 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. Calculate design shear strength of the slab, equation 3. In June 2000, Concrete Construction ran an interview with two of the nation's top slab experts, Eldon Tipping, Structural Services Inc., and the late Armand Gustaferro. 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For a competent contractor working with a decent subbase, that thickness would easily keep the average above the 5 5/8 inches needed to satisfy the average thickness tolerance. Lost your password? If you want a say in how thick your floors should be, youll need to talk to your architect. Simplified Design of Reinforced Concrete Buildings, Fourth Edition, 2011 Mahmoud E. Kamara and Lawrence C. Novak . An exception to this would be for small to medium scale terraces. Your concrete slab for a driveway should be around 10 cm thick. It is incredibly hard and tough. Concrete production can be harmful to the environment. The question now is how thick should your concrete second floor be? Country Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. Facebook; Prev Article. In most cases, however, six inches of concrete is a typical thickness that provides you with long-lasting support. The main factor you need to consider for floor thickness is beams and what you want to do with them. Design Criteria: Method of design for t he concrete structure: Ultimate Strength Design (USD) Design Loads (As per NSCP 2015) >Dead loads. Usually one way slabs and cantilever slabs will have more depth than two way slabs. Our concrete floors are about 5 in thickness. A concrete floor on the second story should ideally be 4-6 in (10.16 - 15.24 cm) thick. Concrete is often found throughout many houses, but concrete flooring is rarely found on the second floor. Decide on the desired thickness of the concrete. My design has a concrete floor to the second level. 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. Eurocode 2 states minimum thickness for floor slabs in buildings is 125mm. Renovating a house is a popular sitcom theme with hilarious comic blunders. There are concrete products that can be poured to produce 6-inch-thick slabs for house foundations as well as products for thinner installations. Which is the code used for the design of the RCC Bridge? Sometimes it can be 7 cm, depends on the cover of reinforcement. 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. is kept 6 inch to 8 (150mm to 200mm), taking minimum thickness should be 6 (150mm), maximum thickness should be 8 (200mm) and there is no nominal or standard thickness should be mentioned in IS code, but I recommended to use nominal or standard thickness of concrete floor slab 6 inch (150mm) thick for Apartment/ high rise building, providing minimum concrete grade M10 to M15 and mesh bar embedded in concrete, 2 deep from top of floor slab. Radiant heating system design or installation mistakes that must be avoided. Concrete is a low-maintenance material. from slabs that are loaded heavily for instance slabs carry several meters of Concrete flooring is sustainable, durable, aesthetically pleasing, versatile, and good value for money. Lastly, slab thicknesses are usually rounded off to the nearest 10mm. The average thickness of a concrete second floor for residential is 0.2 - 0.4 meters. The main reason is that floor thickness, along with all other structural-related parts of a home, is determined through computations done by a structural engineer. If your home shifts due to changes in soil or foundation issues or even earthquakers, your concrete flooring will likely crack. Since the type of concrete for floors isnt adhesive, the mould can be taken apart once the concrete sets. Also, it can be dyed by adding colored powder during the mixing process. 1. This works well for floors with different spaces( Ex. This means that all big rocks need to be removed and the soil itself needs to be compacted. In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design. Concrete floor slab thickness is not depending on how tall/hight of building, its depends on material, Engineering, load acting on it and span, need proper design, what kind of material should be used. Floor Area (ft)=324 / Slab Thickness (in) (Metric) Floor area in square meters from 1 cubic meter of concrete for a given slab thickness. using some basic thumb rules, regulation and guideline as per ACI code and IS code 456:2000, for concrete floor, concrete slab thickness for hotel building is kept 6 inch to 8 (150mm to 200mm), taking minimum thickness should be 6 (150mm), maximum thickness should be 8 (200mm) and there is no nominal or standard thickness should be mentioned in IS code, but I recommended to use nominal or standard thickness of concrete floor slab 8 inch (200mm) thick for hotel building, providing minimum concrete grade M10 to M15 and mesh bar embedded in concrete, 2 deep from top of floor slab. is kept 6 inch to 8 (150mm to 200mm), taking minimum thickness should be 6 (150mm), maximum thickness should be 8 (200mm) and there is no nominal or standard thickness should be mentioned in is code, but i recommended to use nominal or standard thickness of concrete floor slab 6 inch (150mm) thick for apartment/ high rise building, providing 2. Concrete slab thicknesses depend on the type of floor slab used in construction and the span of the slab. Thickness of slabs is in the range of L/30 to L/15 of the span vary from 1.2 to 9 m. For steel beams, wide flange shapes are used. Different types of concrete slabs flat one & two way, hollowcore ribbed, hardy, arch, sunken, grade post tension pre, pitch roof, sunshade, waffle slab . Dan Dorfmueller Wet curing with curing covers is critical to a strong surface. At CivilSir, we share all the information related to civil engineering. 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 . However, before you rip up the flooring upstairs, its worth noting that there are also some drawbacks to using concrete flooring, especially on higher floors. 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. The consent submitted will only be used for data processing originating from this website. Please enter your email address. This is an improvement over the 1990 version of ACI 117, which had a thickness tolerance of +3/8 inch, - inch. 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. Search for jobs related to Second floor concrete slab thickness or hire on the world's largest freelancing marketplace with 20m+ jobs. to 1.2*dead load plus 1.6*live load. Why Do Some Concrete Walls Have Holes in Them. As an Amazon Associate I earn from qualifying purchases. Determination of slab thickness based on bending and shear Concrete weighs a lot. Calculate the square footage by measuring the length and width of the area to be covered. By Cam Merritt Updated December 10, 2018. This particular slab was cast to support a timber stud structure and a 75 mm-thick slab was laid on well-compacted fill. Methods used for finding slab thickness varies for different types of slabs. Typical slabs tend to range from about four to six inches thick. Second-story concrete floors are often less than 4 in (10.16 cm) thick due to the weight of concrete as a building material. If the crack is larger or growing larger (an "active" crack), or one side of the crack is higher than the other, then you may . - Ceiling: Metal Furring Ceiling System = 0.10kPa. Step 2 - Prepare the Floor. Five to six inches is recommended if the concrete This test is called "the relative humidity test using in situ probes," and it's the basis for the ASTM F2170 standard. The same floor, if framed with 2-by-12s, will be 13 1/4 inches thick. This may be counterproductive because the weight of the slab may increase shear force significantly. The thickness of an upper floor is determined by the ceiling design of your first floor, the structural members supporting the floor, and, lastly, the design of your structural system. From the earliest age I can remember, I was planning and building things, and there was no question that Architecture was the right career fit for me. Concrete slab thickness = 20 x 2 + 10 x 4 + 20+5 = 105 mm. So why do some people opt for concrete floors on the second story of their homes? The more beams you have, the thinner you make your floors, but only to a certain degree. Standard concrete floor slab thickness in residential construction is 4 inches. No drawings exist so we had the reinforcing located in the slab, then certain areas chipped out to reveal the rebar. ends continuous; and L/10 for cantilevers; where L is the span. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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 doesn't have to have the gravel base, but the soil underneath it needs to be prepared. It can get quite difficult and expensive to extend a slab directly. 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. 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. Methods used for finding slab thickness varies for different types of slabs. Generally, concrete second floors for residential homes are around 0.2 0.4 meters thick. Drop Panel Depth:.25 x Slab Thickness. Concrete slabs can be onground, suspended, or a mix of both. What is the tolerance for compression test results of concrete, according to the standards? And besides, many job specs will still be referencing ACI 117-90. My advice would be to cover it up with a carpet or any type of flooring. However, in recent years, it has grown in popularity. A crack in a slab of 1/8 inch or less is typically a normal shrinkage crack and not a cause for concern. 0.2 meters is already the minimum, and anything less than that cant hold up reliably. Contractors can start working on other structural members for that floor, such as columns and beams. The deck + slab is 6 thick (not yet clear to me how thick the concrete is). We now turn our boys to the task of preparing for the second story floor slab. While concrete is a durable and long-lasting building material, it is prone to cracking or breaking. In a residential building it is 9 12 or 225 mm 300 mm standard size according to (IS codes). It will be workshop/garage on the ground floor, residence on the 2nd floor. Gypsum Board (per mm thickness) = 0.008 kPa/mm (use 12mm thick) The cubic yard is equal to cubic feet multiplied by .037. For an office space, you require a 2 hour fire rating, which means you require a 4.5" NW concrete or 3.25" LW concrete over a 2" deck. this criterion the fire rating of a floor is the number of hours necessary for So if you are a civil engineering student this is the best platform where you can improve your knowledge. You can choose to have your beam fully integrated with your floor, making it so that you dont have a protruding beam from your ground floor ceiling. and determined to be acceptable. Field Density of Soil by Rubber Balloon Method, Space Frame Structure: Components, Types, and Advantages, 8 Types of Structures in Civil Engineering, Types of Foundation for Buildings and their Uses [PDF], Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results, 16 Types of Heavy Equipment Used in Construction, Methods of Rainwater Harvesting [PDF]: Components, Transportation, and Storage, Calculate Quantities of Materials for Concrete -Cement, Sand, Aggregates, Role of Structural Engineers in Designing Earthquake-Resistant Buildings, Considerations for Engineer when Designing a New Structure. The good news is that you won't have to provide much in the way of maintenance. To overcome this issue, some people install thinner layers of concrete flooring. Riding trowels greatly speed up the finishing operation. Reach Us. High rise building includes multi- stories like 10 storey, 20 storey and apartment. Drawings include: Two-Way Concrete Flat Slab Floor System plan, section, isometric. 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. A concrete slab floor provides a simple way to add thermal mass to a design. Uncategorized. This is also called plate slab. This the theoretical requirement for the thickness of the slab. Project Tittle: Design of 2nd floor concrete slab and columns. If your driveway is about to hold heavy vehicles, you need to make a thicker concrete slab. Floor Area (m) = 1000 / Slab Thickness (mm) Stetson Building Products, LLC. Floor to Floor Height: 10'-16' | 3.05-4.88 m::: Properties. However, concrete is very heavy, which leaves people wondering whether it is a suitable material to use on the second floor? You will receive a link and will create a new password via email. Concrete floors slabs concrete slab beam column minimum flooring thickness in any thickness of slab how to determine. Email: info@alphapaving.com. As a result, in some homes, concrete flooring may not be possible upstairs if there is poor structural support in place. We are using a 1-2-4 mix (one part cement, two parts sand, four parts gravel). Divide the cubic foot measurement by 27 cubic feet. For that reason, knowing the thickness of the concrete slab is critical. However, multiple factors tend to determine the overall thickness of the concrete slab. In addition, it is a heavy material and some homes may not have enough foundation to support its weight. In addition to wood, concrete flooring may also be installed over tiled floors and concrete slabs that fit together. Join now! However, if there is any reinforcement . It's free to sign up and bid on jobs. If the slabs shear strength is less than ultimate shear imposed on the slab, then required strategies shall be considered to tackle the problem. is adequate for one-way shear. The thickness of concrete slabs is usually stated in specification documents. 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. Oct 28, 2017 - Explore Stuart Smith's board "Second floor concrete slab" on Pinterest. Concrete floor systems are reinforced slab structures designed to satisfy a range of loading and span conditions in a building. A shower liner or plastic on a roll that is . You can put concrete floors over wood because it needs support to remain in place. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'whatblueprint_com-medrectangle-4','ezslot_1',110,'0','0'])};__ez_fad_position('div-gpt-ad-whatblueprint_com-medrectangle-4-0');The average thickness of a concrete second floor for residential is 0.2 0.4 meters. Once you have determined that the foundation of the house is strong enough to sustain a concrete floor, lay down wood sheeting. You do this because structural engineers base their computations on an architects plans, and the architect bases their plans on the wants and needs of the client. Slab thickness is the greatest single factor controlling the load-carry capacity of a slab-on-ground. Concrete Questions also participates in affiliate programs with Clickbank, CJ, ShareASale, and other sites. Undoubtedly, concrete is one of the best building materials you can use as long as you have the right structural members necessary to support it. : Previous Next Submit. Constructing a concrete slab costs around $4 $8 per square foot. It is best to check the condition of the wood to ensure that it will not go through structural changes or deformities, such as when it gets exposed to moisture that may later affect the positioning or stability of the concrete floor. . Your minimum slab thickness really depends on what kind of fire rating you require. Deeper beams should be compacted; thin slabs (typically 100mm thick) receive adequate compaction through the placing, screeding, and finishing operations. that need different finishes. To see the details of computing minimum slab thickness, please click here. Some parking lots that see seasonal or light use are only four inches thick. Sorry, you do not have permission to ask a question, You must log in to ask a question. There are approximately 81 square feet in a yard of concrete at 4 inches thick. 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. It is important to understand that thin layers of concrete are prone to cracking. Temperature changes can also cause the concrete to expand or contract, resulting in cracks forming. Depending upon the building design consideration the thickness of slab section changes. Concrete can be poured into pretty much any shape. The materials used in making concrete, like limestone, are readily available across the country. Unfortunately, this position statement currently references ACI 117-90, although an update will soon be available and most of the information in the position statement remains relevant. This is one of the types of concrete slabs. SLAB ON GRADE- slab foundation concrete finished floor Slab-on-grade Foundation Javts . A concrete floor on the second story should ideally be 4-6 in (10.16 - 15.24 cm) thick. 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. 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). I do not allow any concrete to be poured except under my supervision. The building is around 40 years old. We also must lay out all the electric conduits and plumbing pipes that will be set within the slab or go through it. Concrete can be recycled and used again after some time. Due to their relatively small size, residential buildings have a lot more leeway in terms of floor thickness than other building types. 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. 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!). Solved 3 4 0 M 12 3rd Floor Slab 0m 2nd Chegg Com. c . You only need to keep your concrete floor clean. Head office: 15 Roundville Ln #100, Round Rock, TX 78664. Is Quikrete as Strong as Regular Concrete? Thickness of concrete slab depends on loads and size of the slab. Slab thickness formula:- slab thickness formula calculation is only based on construction and detailing requirement according to BS8110 part 01 says that Slab thickness formula = (Cover 4)+ (Dia of bar 4)+ (aggregate size +5) Therefore minimum concrete thickness can be calculated as follow =202+104+20+5=105mm. As a result, concrete floors are often thinner on higher stories. Concrete Questions 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.
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