Usually, when a slab is supported by a beam the support is considered to be pinned. Figure 1 twoway slab with beams spanning between all supports. Bending will take place in the two directions in a dishlike form. Generally if one side is more than double of the other one, the slab will be one way.
Fanella, which appeared in the october 2001 edition of structural engineer magazine. Now in one way slab as one side is bigger than the other side most of the load is carried by that side only so providing main reinforcement corresponding to that load carrying side will be sufficient. The results of the parametric analysis indicate that the deflection of posttensioned twoway slab is more affected by the span length than by the other variables. The program covers wide range of twoway slab systems and can be. Flat slab system is an important division of concrete floor system. Horizontal bond beam reinforcement is required to be located in the. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. The behavior of a twoway slab is similar to that of a oneway slab the only difference being that now the slab loads will be carried in both directions. One way spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Flat slab analysis, design and detailing pdf civil engineering.
Reinforcement calculation in this post, we are going to explain how to calculate steel quantity for the slab. The steel fixers formwork drawing of a twoway slab. Beams of width and depth are provided on all column lines. Eccentric footing foundation column support detail. Details of slab reinforcement on the basis of bar bending schedule. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. Concrete slabs are commonly divided into the following types. Diversion headworks type of diversion headworks components of a diversion headwork. For b oth one way and two way slab with an example. One way slab reinforcement details online civilforum. Hello i have a solid slab about 7000 meter squared reinforced with t12 every 15cm,maximum length of bar is 12m, is there a way to make revit do the reinforcing.
Oneway reinforced concrete slab video animation 02 duration. We assume that the verandah slab is a two way slab instead of one way slab in order to calculate mb,neg. From framing layout all the way through to detail drawing production, safe. Concrete 3 design of concrete beam and slab twoway slab. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and public buildings. View 2 replies from design of structures dos online and others. The following example illustrates the example building. How to detail reinforcements of twoway slabs quora. Civil engineering 3d animation of a reinforced concrete structure. Structural calculations for posttensioned beam and oneway slab construction roya construction building division technical services unit kowloon august 16, 2009 revised. It shows construction steps and placing of reinforcement in beam and slab. Two way slab systems offer several possible arrangements for the tendon layout 10. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria.
The results of the parametric analysis indicate that the deflection of posttensioned two way slab is more affected by the span length than by the other variables. Twoway slab systems offer several possible arrangements for the tendon layout 10. These slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs or other types of structures. In two way slab, the ratio of longer span l to shorter span b is less than 2. Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. Optimisation option for any given rates of concrete and steel.
A civil engineer must know all the aspects regarding the flat floor system. One way slab reinforcing detail typical planmarketplace, your source for quality cad files, plans, and details. Reinforcement detailing of reinforced concrete slabs. Unless otherwise noted, all referenced table, figure, and. Slab design reading assignment chapter 9 of text and, chapter of aci31802. Design of reinforced concrete structures ii twoway slabs 1 1. Twoway concrete slab with beams spanning between supports. Useful information about staircase and their details engineering discoveries house. Slab supported directly by columns are called flat slab. The behavior and the reinforcement of a one way slab connected to a cantilever are described below.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel. The reinforcement rules are also similar in both directions. Design of a two way rcc slab structural engineering. Difference between one way slab and two way slab system the one way and two way slab systems are the most commonly used floor system in the reinforced concrete structure. Twoway concrete slabs with openings the static system and the design of reinforcement.
Behavior of a oneway slab connected to a cantilever civil engineering software, civil. Safe also performs video capture of animations as avi files. Which topics do you need to cover to ace microsoft az900 exam. Difference between one way slab and two way slab simple. A single slab with oneway reinforcement rebars will be analyzed with rcsolver. Now in one way slab as one side is bigger than the other side most of the load is carried by that side only so providing main reinforcement corresponding to. Design of reinforced concrete structures ii two way slabs 1 1. Twoway slabs page 1 of 14 the following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. If the first slab is a two way slab, both the behavior and the reinforcement rules are proportionate.
Steel structure, rebar detailing, civil engineering design, circle house. Concrete 3 design of concrete beam and slab twoway. They may be supported on two opposite sides only fig. Structural calculations for posttensioned beam and oneway. Mar 10, 2018 details language english duration 20 mins format. The ratio lb which is less than 2 is known as two way slab. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. If the first slab is a twoway slab, both the behavior. The safe program provides the user with two principal ways to navi gate through. Civil engineering animation of a reinforced concrete structure. Apr 12, 2018 two way slab full detail explanation diagrams with site below these links are our civil videos learn field work watch and subscribe for more videos building drawings analysis in telugu. Two way slab behaviour the behavior of a two way slab is similar to that of a one way slab the only difference being that now the slab loads will be carried in both directions. Twoway slab article about twoway slab by the free dictionary. Difference between one way slab and two way slab system.
Today, i want to show you details of 1 way reinforcement slab and 2 way reinforcement slab for your easy imagination. A bentup bar called as crank bar is provided to make rcc slab safe from compressive stresses. Determine moments at critical sections in each direction, normally the negative. The program calculates and details the slab reinforcement, either as an arrangement of individual bars, a pattern of prefabricated meshes, or a combination of both. Two way slab reinforcement in detail civil engineering. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab.
Stiffening wall systems ways of bracing rigidity of shear walls and bracing. Slab may be supported on walls or beams or columns. One way slab reinforcing detail typical cad files, dwg. Buildinghow products books volume a the reinforcement. Design of reinforced concrete structures ii twoway slabs. Design of a two way rcc slab structural engineering forum.
Two way slab design by direct design method as per aci 31811. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. Also is it necessary to use other software with max to create such animation. Behavior and reinforcement of oneway slab the structural frame consists of four columns, two beams and one slab. Two way slab design design of two way slab rc design. View test prep concrete 3 design of concrete beam and slab twoway slab part 22 from engineerin 101 at royal melbourne institute of technology. Flat slab analysis, design and detailing pdf civil. Reinforcement detailing of a slab is done based on its support conditions.
Lb2 is one way slab lb reinforcement of a one way slab connected to a cantilever are described below. Reinforced concrete slab and beam design software adaptrc. In site how we can identify one way slab and two way slab. Two way slab design by direct design method as per aci 31811, step by step procedure and limitations of direct design method for two way slab is presented. This construction video offers detailed information on how to design two way slab systems of reinforced concrete adhering to aci 31811. These types of slabs are used in constructing floors of multi storeyed building. This is one way slab reinforcement detail with beam. Reinforcement details at this location are shown in the figure on the next page. Minimum area of reinforcement at bottom of slab minimum area of reinforcement at top of slab reinforcement in ydirection to resist m x about xaxis reinforcement in xdirection to resist m about yaxis. 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. In two way slabs, load will be carried in both the directions. Hence, two way slab is adopted where cranked bars main bars are provided on both sides of the slab. Two way slab 3d view in auto cad by md aariz contact us to create a plan, elevation, section to create your new building. The behavior and the reinforcement of a oneway slab connected to a cantilever are described below.
Two way slab 3d view in auto cad by md aariz youtube. One way and two way slabs one way slabs transfer the imposed loads in one direction only. For more details watch the video with nice animation and detail drawings. The design is based on hong kong building code hkcop 2004 and its amendment of june 2007. Generally, there are two types of slab which are one way and two way slabs. The other ways of analysis of twoway slabs are the direct design method.
Use the equivalent frame method efm and compare the results with spslab model results. In this post, we are going to explain how to calculate steel quantity for the slab. I have developed a microssoft excel software for design of a two way rcc slab. Click the start animation button in the lower righthand corner of the display to.
These materials are originally located at different websites. The reinforcement areas are calculated automatically from the strap finite element analysis results. Building design sketch up animation youtube civil engineering software. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or. Accordingly, main reinforcement is required in the two directions. Design of reinforced concrete structures ii two way slabs. For approximate manual analysis of two way slab of rooms, we know that two way slabs of rooms are not only continuous along the long direction but also continuous along the short direction with the verandah slab.
Design of a two way reinforced concrete slab with rcsolver software program according to eurocode 2 specifications. The basic design procedure of a twoway slab system has five steps. The first example is for a mildreinforced concrete slab rc, and the. The main variation among the two types of slabs in one way slab load is delivered to one direction only that is the smaller one and therefore, primary reinforcement is presented parallel to the span while temperature or shrinkage reinforcement is presented perpendicular to. Buildinghow products books volume a the reinforcement ii slabs twoway see more. Design strips are used to define how reinforcement requirements are to be calculated. Oneway and twoway slabs university of asia pacific. The following example illustrates the design methods presented in the pca book simplified design. Reinforced concrete slab and beam design software adaptrc 2017 product overview an easytouse and learn software for the design, analysis, and investigation of reinforced nonprestressed concrete beams, beam frames, slabs and floor systems a must have production tool in every structural engineering office. So, main reinforcement is provided in both direction for two way slabs.
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