Introcduction slab in which the deflected surface is predominantly cylindrical termed as one way slabs spanning in the direction of curvature. The slab may be supported by walls, by reinforced concrete beams usually cast monolithically with the slab, by structural steel beams, by columns, or by the ground. Example design of two way edgesupported solid slab. A oneway slab is defined for purposes of this book as a flexural member with depth. If you continue browsing the site, you agree to the use of cookies on this website.
The slabs are made one way though using two simple supports. Slabs are generally designed on the assumption that they consists of a number of beams of breadth one meter. The first stage of the design is finding the bending moment of the slab panels. D mm d 105 mm loads on slab self weight of slab 3. Reinforced concrete design 1 design of slab examples and.
Time saving design aids two way slabs page 1 of 14 the following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. Download two way slab design excel sheet template for free. Dhang, department of civil engineering, iit kharagpur. Fundamentals of posttensioned concrete design for buildings part one a suncam online continuing. Department of mechanics, materials and structures english. Shear in one way slabs under concentrated load close to support. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Introduction, definitions flat slabs are two way slabs supported by pointlike supports. Chapter 3 design of rectangular beams and oneway slabs. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Design of reinforced concrete structures ii twoway slabs. Two way slab design based on aci 31811 using finite element method. Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures. Jul 26, 2014 this entry was posted in excel sheets and tagged excel sheets, one way slab design excel sheet, one way slab design spreadsheet, slab design excel sheet, spreadsheets by civilengineerspk.
Analysis and design of slabs one way civil engineers pk. One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. To demonstrate the applicability of the proposed approach an example of a simply supported reinforced concrete tsection beam of. Sometimes the minimum depth is adequate as per flexure design, but if deflection criteria arent fulfilled such slabs will face vibration even under small loads like walking, jumping, etc. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Fundamentals of posttensioned concrete design for buildings part one. May 02, 2017 one way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction. For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. Design example of one way slab with detailing q6ng6kj6d24v. A bentup bar called as crank bar is provided to make rcc slab safe from compressive stresses.
Ce 433, fall 2006 slab design example 1 6 design a one way slab for an exterior bay of a multistory office building using the information specified below. In this work the cost optimization design of rc oneway slabs was performed by the. I have developed a microssoft excel software for design of a two way rcc slab. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Feb 24, 2019 continuous oneway solid slab last updated on sun, 24 feb 2019 concrete structures this calculation is intended to show in detail the provisions of designing a slab to eurocode 2 using essentially the same slab as used in example 3. Bending will take place in the two directions in a dishlike fo. One way simplysupported and continuous solid slab free download as powerpoint presentation. Slab is one of the most famous part of a construction project. Twoway concrete slab with beams spanning between supports. Reinforced concrete oneway slab design pd49gzkzp2n9. One way simplysupported and continuous solid slab bending. One way slab design criteria with design example according to aci code slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. One and two way slab quantity excel sheetfree download.
Design reinforced concrete oneway slab free download as powerpoint presentation. The design calculations for all slab specimens are based on aci318 2014 and considering all. 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. While two way slabs also consist of two types namely simply supported two way slab and constrained slab. One way and two way slabs one way slabs transfer the imposed loads in one direction only. One way slab design procedure with example design of one. 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.
Designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. There are several methods by which two way slabs can be designed. Lecture series on design of reinforced concrete structures by prof. Pt designer design of posttensioned concrete floors. Nov 27, 20 one way slab design criteria with design example according to aci code slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Here ratio of longer span of slab to the shorter span of slab is greater than 2. Download free excel spreadsheet for concrete design of two way slab, voided biaxial slab, anchorage to concrete, anchorage to pedestal, circular column, concrete column, super composite column. 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. Oneway and twoway slabs university of asia pacific. Beams of width and depth are provided on all column lines. The paper presents the cost optimization of reinforced concrete simply supported one way slabs under uniformly distributed load with the nonlinear programming. For those who do not know what are the des ign requirements of a slab. Pdf one way slab design nscp 2015 free download pdf. Assume partitions cannot be damaged by deflections.
Fundamentals of posttensioned concrete design for buildings. For example, the code requires stirrups in most beams, but specifically exempts slabs and footings from the requirement. Slabs having supports on less than four sides can be designed as one way. Nov 15, 2014 one way slab here i solve a probleam based on the one way slab, the diamentions are provided in the probleam 1st determine the aspect ration and with respect to the aspect ratio the type of slab. Plan view of floor system assume partitions will not be damaged by deflections. Design example of one way slab with detailing scribd. Simplified design to bs 5400 bridge design to the eurocodes in part d.
If slab is supported on all four sides and r shorter side longer side one way slab. Pdf the main objective of this project is to analyze and design a multistory. Net, which many engineers have come to trust over the years for its accuracy and flexibility. One way slab being supported on two opposite sides only leads to the structural action in single direction. Ppt design of slabs powerpoint presentation free to.
The load on the slab is carried by the short span in one direction. Reinforced concrete design 1 design of slab examples. The following example illustrates the example building. Designing a simply supported reinforced concrete one way slab. Pdf design calculation design of one way slab slab s1. Fanella, which appeared in the october 2001 edition of structural engineer magazine. Design steps of one way slab rcc vylywmjome4m idocpub. To see their result for this slab we will find the load factor. This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code.
Oneway and twoway slabs oneway slabs transfer the imposed. Download limit state design of reinforced concrete by varghese p. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Punching of flat slabs design for shear at th e column heads. Behavior and reinforcement of one way slab the structural frame consists of four columns, two beams and one slab. Minimum depth of the one way concrete slab, most of the times is governed by deflection criteria. 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.
Chapter 3 design of rectangular beams and oneway slabs 12. Jun 14, 2017 download two way slab design excel sheet template. Download book pdf structural design guide to the aci building code pp 3754 cite as. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects.
The slab has to carry a distributed permanent action of 1. Flat slab analysis, design and detailing pdf civil engineering. Design procedure steps for one way slab slab design steps. In 1914 nichols used statics to compute the total moment in a slab panel. Download free excel spreadsheet for concrete design. Here are the steps for the design procedure for one way slab in steps. When a rectangular slab is supported on all the sides and the lengthtobreadth ratio is less than two, it is considered to be a two way slab. When a rectangular slab is supported on all the sides and the lengthtobreadth ratio is less than two, it is considered to be a twoway slab.
Flat slab analysis, design and detailing pdf civil. Two way slab design to aci free download and software. One way slab design excel sheet civil engineers pk. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. However main reinforcement bar and distribution bar. Design of reinforced concrete structures ii two way slabs 1 1. Usually, when a slab is supported by a beam the support is considered to be pinned.
Depending on the boundary condition and the properties of the slabs, methods of finding bending moment is expressed in the bs 8110 part 01 as follows. Bending will take place in the two directions in a dishlike form. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. One way slab is supported by beams in only 2 sides. Slab design reading assignment chapter 9 of text and, chapter of aci31802. Continuous oneway solid slab concrete structures eurocode. Two way concrete slabs with openings the static system and the design of reinforcement. Design of a two way rcc slab structural engineering forum. History of two way slabs the feeling at start that only part of the load to be carried in each direction, so that statics somehow did not apply to slab construction. Jan 15, 2017 in this post, i will go over the third example in our course that covers the analysis and design of reinforced concrete one way slabs. The recommendations derived from these and other studies vary from extremely light to extremely heavy.
Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and public. Department of mechanics, materials and structures english courses reinforced concrete structures code. It was actually the widespread use of the posttensioned slabonground which induced this interest in design procedure and in many studies of reported slab failures. In this article, i will discuss how to design one way slab with example. C limit state design is a method incorporated in structural engineering. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems. When a slab is supported on all four sides and the ratio of long span to short span is equal or greater than two, it will be considered as one way slab. Pdf behavior of one way reinforced concrete slabs with styropor. Ce 433, fall 2006 slab design example 1 6 design a oneway slab for an exterior bay of a multistory office building using the information specified below. One way slab has two types namely simply supported slab and one way continuous slab. The direction in which the load is carried in one way slab is called the span.
Two way 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. The coefficient method may be the simplest, easiest and the quickest approach for the design of two way slab supported by edge beam on all slab sides. One way joist 41 two way slab analyzed by the direct design method 47. Part two is an example intensive course, with key concepts introduced along. Pdf the paper presents the cost optimization of reinforced concrete simply. This second edition of limit state design of reinforced concrete is updated according to is 456. Design example of one way slab with detailing free download as pdf file. Reinforcement detailing of reinforced concrete slabs. One way slab design spreadsheets to eurocode 2 engineering. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. Limit state is actually the state of a structure, which does not fit into a suitable design criteria. Slabs are usually used in floor and roof construction. Slab design is comparatively easy when compared with the design of other elements. Concrete slabs are commonly divided into the following types.
All methods are viable provided that the safety and serviceability of the elements are within the acceptable limits. The goal of this reinforced concrete design example is to design a simply supported reinforced concrete one way slab subjected to dead and live loads per aci code 31811. The program is developed around the robust computational core of two popular programs ptdata. Rectangular beams and one way slabs page 2 of 9 two methods. Steel design 102 wshapes in strong axis bending, braced at some points 102. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Jan 15, 2017 one way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. His analysis suggested that the current slab design. Distribute moments transverse at critical sections to column and middlestrip and if. The simplest routine structural element for illustration of design provisions in the code is the one way slab. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. A one way slab is defined for purposes of this book as a flexural member with depth small relative to other dimensions, supporting gravity loads applied normal to and directly over its surface, spanning in one direction between parallel supports, and reinforced for flexure. The two classifications are one way slab and two way slab.
Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. A single slab with oneway reinforcement rebars will be analyzed with rcsolver. Slab types can be decided through side ratio calculation through bs8 110 reference such as.
Determine moments at critical sections in each direction, normally the negative. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0. Design of slabtwo way excel sheet online civilforum. 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. Jul 02, 2010 lecture series on design of reinforced concrete structures by prof. Pdf shear in oneway slabs under concentrated load close. Allowable stress design or working stress design wsd 2. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. They may be supported on two opposite sides only fig. Examples to aci, aisc and asce interactive calculation templates to us codes u. Oneway and two way slabs one way slabs transfer the imposed loads in one direction only. Pdf cost optimum design of reinforced concrete simply. Design of reinforced concrete structure one way slab presented by md. Summary of bill of quantities civil works bar bending schedule.
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