This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code. The basic design procedure of a two way slab system has five steps. Design the slab following the provisions of the aci code. Can be used for larger spans with relatively higher cost and higher deflections one way joist system suitable span 6 to 9m with ll 46knm2. Design of one way slabs the structural action of a one way slab may be visualized in terms of the deformed shape of the loaded surface. 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. The analysis and design follow the equivalent frame analysis method of the aci code, which considers a one bay wide strip of the floor system as a continuous frame. Reinforced concrete design to bs8110 structural design 1. Design of oneway slab free download as powerpoint presentation. Q design a floor slab for an interior room, with clear dimensions of 3. Key changes in the 2019 edition of the aci building code. Slab is one of the most famous part of a construction project. Flat slab system is an important division of concrete floor system. Figure 1 twoway slab with beams spanning between all supports.
A slab strip of unit width is analysed using simple beam theory. In other words, the one way slab is supported by beams in such a way that the load is carried along one direction. The program is developed around the robust computational core of two popular programs ptdata. One way slab one way slabs are those slabs with an aspect ratio in plan of 2.
Plan view of floor system assume partitions will not be damaged by deflections. Chapter 3 design of rectangular beams and oneway slabs. Analysis and design of waffle slabs free download as pdf file. One way slabs subjected to combination of loads failing in shear. Determine moments at critical sections in each direction, normally the negative. Design a one way slab for an interior bay of a multistory office building using the information specified below. Quick guide to design of one way slab with is code 456. Direct design method ddm for slab systems with or without beams loaded. Reinforced concrete design 1 design of slab examples.
A oneway slab is defined for purposes of this book as a flexural member with. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Pdf cost optimum design of reinforced concrete simply. For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3. Pdf design calculation design of one way slab slab s1. Spaneffective depth ratio to estimate a suitable depth for the section.
Deep ribs, the concrete and steel quantities are relative low. Pdf oneway slabs subjected to combination of loads failing. A slab is structural element whose thickness is small compared to its own length and width. Short ppt on 2 way slab design a waffle slab is a type of slab with holes underneath, giving an appearance of waffles. Beams and oneway slabs mcgrawhill education access. Flat slab analysis, design and detailing pdf civil.
Manual for design and detailing of reinforced concrete to. One way slab can be defined as the type of slab in which the ratio of the longer span to the shorter span is greater than two. The slab has to carry a distributed permanent action of 1. Deep ribs, the concrete and steel quantities are relative low expensive formwork expected. One way slab can be defined as the type of slab in which the ratio of the longer span to. Design a simply supported one way slab over a clear span of 3. Key changes in the 2019 edition of the aci building code aci. Chapter 3 design of rectangular beams and oneway slabs 12. We have provided you with this example in pdf format for your ease. For example, the code requires stirrups in most beams, but specif.
Mar 09, 2015 member design rc one way spanning slab 030915 member design reinforced concrete one way spanning slab bs8110 v2015. The analysis and design of one way slab, one way joist, interior beam, and exterior beam are shown in this example. Also, if the slab is supported on all four edges and the ratio of longer spanl y to shorter span lx i. Pdf the paper presents the cost optimization of reinforced concrete simply supported one way slabs under uniformly distributed load with the nonlinear. Figure 1 shows a rectangular slab, simply supported along its two opposite long edges and free of any support along the two opposite short edges. Assume partitions cannot be damaged by deflections. Summary of bill of quantities civil works bar bending schedule.
Memberlocation all beams beam sag beam hog ebeam sag ebeam hog. Pdf oneway slabs subjected to combination of loads. Reinforced concrete slab slabs are plate elements forming floors, roofs in buildings. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. One way ribbed slab design example pdf material ui icons version. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. The following example shows a simple method of sizing a beam using. Please read the lauses mentioned in the video while solving the problem. Reinforced concrete design 1 design of slab examples and. Now let us have a numerical on it to get a full concept on the procedure to design of one way slab. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Design the slab, following the provisions of the aci code.
Analysis and design of slabs one way civil engineers pk. Figure 1 shows a rectangular slab, simply supported along its two opposite long edges and free of any support along the two. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Two way slab design to aci free download and software. Design of reinforced concrete structures ii twoway slabs. Lecture series on design of reinforced concrete structures by prof.
When zd is determined, the prestressing force required to balance an. The following example illustrates the example building. Hanger reinforcement for beams if a reinforced concrete beam is cast monolithically with a supporting beam and intersects one or both side faces of the. Ultimate behavior of one way spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. Fast and efficient design of posttensioned beams, one way and two way slabs and mat foundations supports up to 25 spans plus a cantilever at either or both ends supports multiple segments with different crosssections within a single span for beams, one way, and two way slabs. M before discussion of this method, we have to study some concepts. Twoway concrete floor slab with beams design and detailing. Lrfd castinplace cip slab span design example county. One way slab and two way slab design procedure example. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. Oneway and twoway slabs oneway slabs transfer the imposed. Behavior of one way slab when a slab is supported only on two parallel apposite edges, it spans only in the direction perpendicular to two supporting edges. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2.
The pca computer program pcaslab can be used to expedite the design of different slab systems. Learning outcomes at the end of this lecture, the student should be able to a classify all types of solid slab co1 b identify one way and two way solid slab co1 c use a relevant clauses in code of practice co1 d design one way slabs co2 e details the slabs co1. Comparison of one way and two way slab behavior economic choices one way slab on beams suitable span 3 to 6m with ll 35knm2. Introduction in reinforced concrete construction, slabs are used to provide flat, useful surfaces. Pdf design calculation design of one way slab slab s1 span of. Posttensioned concrete design spreadsheet program a pdh. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1. To see their result for this slab we will find the load factor. Select representative 1 m wide design stripstrips to span in the short direction, as. Aci documents are available in print, by download, on cd rom, through electronic subscription. A reinforced concrete slab is built integrally with its supports and consists of two equal spans, each with a clear span of 15 ft. One way slab design procedure with example design of one.
A reinforced concrete slab is a broad, flat plate, usually horizontal, with top and bottom surfaces parallel or nearly so. Design a cantilever projecting out from a room slab extending 1. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. For uniformly distributed loads of w per square foot of the slab, each strip acts approximately like a simple beam uniformly loaded by its share of w. The service live load is 116 psf and 4000 psi concrete is specified for use with steel of yield stress equal to 60,000 psi. Design principles and calculations slab design the hambro slab the slab component of the hambro d500 composite floor system behaves as a continuous one way slab carrying loads transversely to the joists, and often is required to also act as a. Load transfer in a one way slab, b two way slab nilson fig.
What is two way slab design reinforcement details green. Member design rc one way spanning slab 030915 member design reinforced concrete one way spanning slab bs8110 v2015. Manual for the design of reinforced concrete building. Types of one way slab one way slab may be solid hollow ribbed 6. Provisions for two way slabs the code has contained detailed provisions for use of the direct design and equivalent frame methods since their introduction in the 1970s. The output of the program for the slab in the example is shown in the following pages. The program covers wide range of two way slab systems and can be used for more complex slab layouts. 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. One way slabs normally design as a beam with cables running in the direction of the span at uniform centres. Pt designer design of posttensioned concrete floors.
The design of composite slabs and beams is discussed in detail in relation to the eurocodes and bs 5950. Jun 14, 2017 download two way slab design excel sheet template. Download two way slab design excel sheet template for free. This spreadsheet program provides for the design and analysis of posttensioned concrete one way beam and slab systems and two way flat plate slab systems. In this example, the latter option will be used to achieve better understanding for the design of two way joist slab often called two way ribbed slab or waffle slab.
Design principles and calculations slab design the hambro slab the slab component of the hambro d500 composite floor system behaves as a continuous one way slab carrying loads transversely to the joists, and often is required to also act as a diaphragm carrying lateral loads to shear walls or other lateral load resisting elements. Design the slab, following the provisions of the ack code. Check the applicable joist dimensional limitations as follows. 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. Dhang, department of civil engineering, iit kharagpur. Design example of one way slab with detailing pdftxt. Design of concrete structure i ppt video online download. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Pdf design calculation design of one way slab slab s1 span. The service live load is 100 psf, and 4000 psi concrete is specified for use with steel with a yield stress equal to 60,000 psi. This chapter covers the design and detailing of beams and oneway slabs. Member design reinforced concrete one way spanning slab.
The hand solution is used for a detailed comparison with the analysis and design results of the engineering software program spbeam. Examples of the portion of slab to be included with the beam under. One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Analysis and design of two way slabs page 1 chapter 3. Pdf oneway slabs subjected to combination of loads failing in. Ce 433, summer 20 slab design example 1 5 design a one. Analysis and design of slabs, one way slabs, online free slab design, design of slabs. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place.
Deck is 46 ft wide with a 15 degree skew roadway is 44 ft. Design calculation design of one way slab slab s1 span of one way slab l 2 m section provided. Twoway concrete slab on beams floor analysis and design aci. Twoway joist concrete slab floor waffle slab system. These materials are originally located at different websites. The thickness of slab is first estimated, based on minimum thickness from table 7. Design of reinforced concrete structuresone way slab.
One way simplysupported and continuous solid slab bending. In addition to general ultimate and serviceability limit state design issues, practical design considerations such as the formation of holes in the slab, support details, fire protection, and attachments to the slab are discussed. In this video deisgn of two way slabs has been covered using is 456. Rectangular beams and one way slabs page 3 of 9 design of rectangular beams and one way slabs continued a. Slab design reading assignment chapter 9 of text and, chapter of aci31802. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems. In any span, the max cable sag, zd depends on the concrete cover requirements and the tendon dimensions. A civil engineer must know all the aspects regarding the flat floor system. Structural design guide to the aci building code pp 3754 cite as. Although these methods are still applicable to the design of two way slabs and are still permitted by aci 31819, they have been largely replaced in.
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