To see their result for this slab we will find the load factor. The direction in which the load is carried in one way slab is called the span. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. One way slab design procedure with example design of one. Design example of one way slab with detailing free download as pdf file.
Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Strength design or ultimatestrength design usd strength design or ultimatestrength design usd with strength design method, the working dead load dl and live load ll are. Design of reinforced concrete structures ii twoway slabs. For example, the code requires stirrups in most beams, but specifically exempts slabs. If the slab is supported in the short direction only, the slab may crack in the long. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is. Over 10 million scientific documents at your fingertips. Reinforced concrete slab design using the empirical method bridgesight solutions for the aashto lrfd bridge design specifications bridgesight software tm creators of effective and reliable solutions for the worlds bridge engineers.
Use the equivalent frame method efm and compare the results with spslab model results. Reinforced concrete design one way slab design aspect ratio. A civil engineer should study these lectures and materials for structural engineering acumen. Oneway slab design procedure beam structure applied and. Files download best concrete design excel spreadsheet free. Based on the stiffness requirement assume suitable depth and calculate the effective span. 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.
Whatever may be the width of the slabs it should always be designed for a width of equal to one metre and the same design should be adopted for the rest of the slab. Distribute moments transverse at critical sections to column and middlestrip and if. Design of reinforced concrete slabs 115 1 the first failure zone is from the face of the loaded area to the perimeter 1. Here are the steps for the design procedure for one way slab in steps. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Ce 433, summer 20 slab design example 1 5 design a one. Analysis and design of one way and two way slab in staad. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. Oneway slabs normally design as a beam with cables running in the direction of the span at uniform centres.
Structural design is an art and science of creation, with economy and elegance, a safe, servicable and durable structure. The variable strut inclination method is used in eurocode 2 for the assessment of the shear. How to design concrete structures using eurocode 2. Allowable stress design or working stress design wsd 2. Reinforced concrete design to bs8110 structural design 1 lesson 5 1 lesson 5. The design procedure for a uniformly loaded oneway reinforced slab can be divided in the following steps. The two classifications are oneway slab and twoway slab. Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. Beams and one way slabs how to design concrete structures using eurocode 2 design procedure a procedure for carrying out the det ailed desi gn of slabs assumes that the slab thickness has previously been determined during conceptual design. Reinforced concrete design to bs8110 structural design 1.
This will on the one hand, help the control of cracking, increase durability, while on the other assist placing and compaction. One way slab one way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. Twoway concrete floor slab with beams design and detailing design the slab system shown in figure 1 for an intermediate floor where the story height 12 ft, column crosssectional dimensions 18 in. Application of one way slab provides useful flat surface one way slab may be used when there is architectural limitations it is the simplest form of slab design main reinforcement placing is one way, so there is a little congestion than two way slab 29. When zd is determined, the prestressing force required to balance an. The ratio of longer span l to shorter span b is equal or greater than 2, considered as one way slab because this slab will bend in one direction i. Compressive strength of concrete cube test pdf, procedure, results. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. Following are the rcc slab design and detailing guidelines. Design steps of one way slab rcc vylywmjome4m idocpub. Before going to this topic, please read it there are two types of slab classification based on the direction of bending occurs in these slabs. Pdf slabs are the flooring systems of most structures including office. Although the major reinforcement in one way slab span is in the short direction, yet at the corner, the moment is actual supported by beams at both directions.
Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of conc. Flat slab analysis, design and detailing pdf civil. Oneway and twoway slabs university of asia pacific. In any span, the max cable sag, zd depends on the concrete cover requirements and the tendon dimensions. A slab strip of unit width is analysed using simple beam theory. Calculate hmin and round it to higher 10mm multiple. Analysis and design of slabs, one way slabs, online free slab design, design of slabs one way, free slab design online, design procedure for one way slab. Design of oneway reinforced concrete slabs class notes and examplepage 1 of 6 notes on designing oneway slabs aci 318 ch.
Download book pdf structural design guide to the aci building code pp 3754 cite as. Analysis and design of slabs one way civil engineers pk. Flat slab analysis and design pdf flat slab design pdf 1. Carry out analysis step 2 moment envelope sk 29 typical moment envelope. Lb2 is one way slab lb content and search advanced slab design.
One way slab design excel sheet civil engineers pk. Chapter 3 design of rectangular beams and oneway slabs. This spreadsheet consists of many segments regarding rcc aspects as described below. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. What is the design of a one way slab and a two way slab. The high accuracy in design calculations of structures is undesirable because there. One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction.
Reinforced concrete oneway slab design pd49gzkzp2n9 idocpub. Slab are considered as oneway if the main reinforcement is designed only in one direction. Mention the parameters governing slab moment coefficients and explain their effects on moment. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in. Summary of bill of quantities civil works bar bending schedule. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Rc slab design ec2 worked example shear and deflection checks. More detailed advice on determining design li fe,actions, material properties, methods of analysi s. Difference between one way slab and two way slab simple. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is 456. Design of oneway slab free download as powerpoint presentation. Oneway and twoway slabs oneway slabs transfer the imposed. Here ratio of longer span of slab to the shorter span of slab is greater than 2. This condition occur if the slab supported by two side of beam or walls.
One way and two way slab reinforcement in detail at sit duration. Generally, there are two types of slab which are one way and two way slabs. Design procedure the basic design procedure of a two way slab system has five steps. Twoway concrete slab on beams floor analysis and design. A oneway slab is defined for purposes of this book as a flexural member with depth.
What are the difference between tender and contract documents. Steps to be followed for the determination of punching shear reinforcement in slabs. For those who do not know what are the des ign requirements of a slab. These materials are originally located at different websites. 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. Slab is a common term used to describe the structural elements such as floors and roofs where the thickness of the element is very small compared to the length and. Design procedure steps for one way slab slab design steps. Two way slab design by direct design method as per aci 31811. Design of reinforced concrete structures ii twoway slabs 1 1. A procedure for carrying out the detailed design of slabs is shown in table 1. Rectangular beams and oneway slabs page 2 of 9 two methods.
That is, the load factor at which the uls moment equals the moment capacity. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Design example of one way slab with detailing scribd. Design procedure the basic design procedure of a twoway slab system has five steps. Oneway slab design procedure free download as word doc. Calculate factored moment and shear force by considering the onemeter width of the slab. Assume partitions cannot be damaged by deflections. They may be supported on two opposite sides only fig.
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