Introcduction slab in which the deflected surface is predominantly cylindrical termed as one way slabs spanning in the direction of curvature. The recommendations derived from these and other studies vary from extremely light to extremely heavy. Slab types can be decided through side ratio calculation through bs8 110 reference such as. A oneway slab is defined for purposes of this book as a flexural member with depth. Beams of width and depth are provided on all column lines.
The slabs are made one way though using two simple supports. One way slab has two types namely simply supported slab and one way continuous slab. Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures. D mm d 105 mm loads on slab self weight of slab 3. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. To see their result for this slab we will find the load factor. Behavior and reinforcement of one way slab the structural frame consists of four columns, two beams and one slab. Pdf shear in oneway slabs under concentrated load close.
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. The program is developed around the robust computational core of two popular programs ptdata. 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. Fundamentals of posttensioned concrete design for buildings part one a suncam online continuing. Reinforced concrete oneway slab design pd49gzkzp2n9. Two way concrete slabs with openings the static system and the design of reinforcement. Download free excel spreadsheet for concrete design. Jun 14, 2017 download two way slab design excel sheet template. Rectangular beams and one way slabs page 2 of 9 two methods. Oneway and twoway slabs oneway slabs transfer the imposed. Design of reinforced concrete structures ii twoway slabs.
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. However main reinforcement bar and distribution bar. Slab is one of the most famous part of a construction project. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. This second edition of limit state design of reinforced concrete is updated according to is 456. Allowable stress design or working stress design wsd 2. Pdf cost optimum design of reinforced concrete simply. Download limit state design of reinforced concrete by varghese p. Part two is an example intensive course, with key concepts introduced along. Flat slab analysis, design and detailing pdf civil. One way simplysupported and continuous solid slab bending. While two way slabs also consist of two types namely simply supported two way slab and constrained slab.
If slab is supported on all four sides and r shorter side longer side one way slab. Reinforced concrete design 1 design of slab examples and. For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3. Designing a simply supported reinforced concrete one way slab. Continuous oneway solid slab concrete structures eurocode. Usually, when a slab is supported by a beam the support is considered to be pinned. Design of reinforced concrete structure one way slab presented by md. Reinforced concrete design 1 design of slab examples.
Chapter 3 design of rectangular beams and oneway slabs. Department of mechanics, materials and structures english. 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. 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. Here are the steps for the design procedure for one way slab in steps. 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. Determine moments at critical sections in each direction, normally the negative. Pdf the main objective of this project is to analyze and design a multistory. 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. Chapter 3 design of rectangular beams and oneway slabs 12. The paper presents the cost optimization of reinforced concrete simply supported one way slabs under uniformly distributed load with the nonlinear programming. 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. Minimum depth of the one way concrete slab, most of the times is governed by deflection criteria. In 1914 nichols used statics to compute the total moment in a slab panel.
Twoway concrete slab with beams spanning between supports. 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. 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. Pdf the paper presents the cost optimization of reinforced concrete simply. Two way slab design to aci free download and software. 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. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. For example, the code requires stirrups in most beams, but specifically exempts slabs and footings from the requirement. Oneway and two way slabs one way slabs transfer the imposed loads in one direction only. Fundamentals of posttensioned concrete design for buildings. Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. All methods are viable provided that the safety and serviceability of the elements are within the acceptable limits.
Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. One way and two way slabs one way slabs transfer the imposed loads in one direction only. Design example of one way slab with detailing free download as pdf file. The simplest routine structural element for illustration of design provisions in the code is the one way slab. Department of mechanics, materials and structures english courses reinforced concrete structures code. Introduction, definitions flat slabs are two way slabs supported by pointlike supports. Steel design 102 wshapes in strong axis bending, braced at some points 102. Fundamentals of posttensioned concrete design for buildings part one. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. A bentup bar called as crank bar is provided to make rcc slab safe from compressive stresses. Design of slabtwo way excel sheet online civilforum. The two classifications are one way slab and two way slab. One way slab design procedure with example design of one. 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.
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. Pdf design calculation design of one way slab slab s1. The direction in which the load is carried in one way slab is called the span. Slab design is comparatively easy when compared with the design of other elements. Here ratio of longer span of slab to the shorter span of slab is greater than 2. 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. One way slab being supported on two opposite sides only leads to the structural action in single direction. One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter.
This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code. Plan view of floor system assume partitions will not be damaged by deflections. Design example of one way slab with detailing q6ng6kj6d24v. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. Two way slab design based on aci 31811 using finite element method. 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. Assume partitions cannot be damaged by deflections. Download two way slab design excel sheet template for free. Bending will take place in the two directions in a dishlike form. Analysis and design of slabs one way civil engineers pk. One way joist 41 two way slab analyzed by the direct design method 47. 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.
A single slab with oneway reinforcement rebars will be analyzed with rcsolver. In this article, i will discuss how to design one way slab with example. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and public. 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. The design calculations for all slab specimens are based on aci318 2014 and considering all.
The basic design procedure of a two way slab system has five steps. Jul 02, 2010 lecture series on design of reinforced concrete structures by prof. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Design of a two way rcc slab structural engineering forum. Shear in one way slabs under concentrated load close to support. C limit state design is a method incorporated in structural engineering. Pt designer design of posttensioned concrete floors. 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. Design example of one way slab with detailing scribd. Design reinforced concrete oneway slab free download as powerpoint presentation. Ppt design of slabs powerpoint presentation free to. 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. Slabs are generally designed on the assumption that they consists of a number of beams of breadth one meter.
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. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. Fanella, which appeared in the october 2001 edition of structural engineer magazine. Concrete slabs are commonly divided into the following types. Download book pdf structural design guide to the aci building code pp 3754 cite as. Limit state is actually the state of a structure, which does not fit into a suitable design criteria. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Slabs having supports on less than four sides can be designed as one way. Bending will take place in the two directions in a dishlike fo.
Pdf behavior of one way reinforced concrete slabs with styropor. Examples to aci, aisc and asce interactive calculation templates to us codes u. One way slab design excel sheet civil engineers pk. Summary of bill of quantities civil works bar bending schedule. The following example illustrates the example building. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0. I have developed a microssoft excel software for design of a two way rcc slab. There are several methods by which two way slabs can be designed. Oneway and twoway slabs university of asia pacific. Slab design reading assignment chapter 9 of text and, chapter of aci31802. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Lecture series on design of reinforced concrete structures by prof. Reinforcement detailing of reinforced concrete slabs.
One way slab design spreadsheets to eurocode 2 engineering. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Pdf one way slab design nscp 2015 free download pdf. Dhang, department of civil engineering, iit kharagpur. In this work the cost optimization design of rc oneway slabs was performed by the. His analysis suggested that the current slab design. Example design of two way edgesupported solid slab. Net, which many engineers have come to trust over the years for its accuracy and flexibility.
Distribute moments transverse at critical sections to column and middlestrip and if. 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. To demonstrate the applicability of the proposed approach an example of a simply supported reinforced concrete tsection beam of. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems. The first stage of the design is finding the bending moment of the slab panels. Flat slab analysis, design and detailing pdf civil engineering. 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. One way slabs are those supported continuously on the two opposite sides so that the load sare carried along one direction only. One and two way slab quantity excel sheetfree download. They may be supported on two opposite sides only fig. 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.1642 1545 135 338 276 1646 778 327 536 213 101 1226 327 651 794 1381 867 1506 766 1217 408 348 351 1424 1400 1650 295 196 67 1178 407 1497 545 1126 1193 1006 505 32 381