For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Twoway slabs structural engineering forum of india, sefi. Twoway joist waffle slab design approach and methodology. Difference between one way slab and two way slab one way slabs one way slabs are those slabs with an aspect ratio in plan of 2. Slab refers to a common structural component of modern building. One way slab design simplified online design of concrete. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Use i wsd, ii usd to design the twoway slab shown below, carrying floor finish 30 psf, random wall 50 psf and live load 60 psf given. Fundamentals of posttensioned concrete design for buildings part one a suncam online continuing. Continuous one way slab main reinforcement effective depth.
The following example illustrates the design methods presented in the. Looking for exampleshelp for designing a concrete cover slab. For those who do not know what are the des ign requirements of a slab. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0. Design of one way slabs as per is 456 worked step by. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. My thoughts would be to design for punching shear around the missing area where the manhole cover is to be place however i am unsure how to make up for the missing concrete. Design example of one way slab with detailing scribd. Design of slab examples and tutorials by sharifah maszura syed mohsin. The building is located in seismic zone iii on a site with medium soil. Over 10 million scientific documents at your fingertips. The proposed slab system must be able to be constructed at a reasonable cost.
Under smartarttools, on the format tab, in the size group, do the following. Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. 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. Reinforced concrete slab design guidelines a effective span of slab. One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. The program covers wide range of two way slab systems and can be used for more complex slab layouts. Engineering excel spreadsheet downloads civil engineering resources. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. D mm d 105 mm loads on slab self weight of slab 3. Design example of one way slab with detailing free download as pdf file. Pt designer design of posttensioned concrete floors.
I also request if someone can make similar sheet for designing of one way slab. 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. The codes governing the design of the one way slab will be aci 31802 and ibc 2003. Simple span reinforced concrete slab bridge rating example. Unless otherwise noted, all referenced table, figure, and equation numbers are from these books. Download from so many useful civil engineering files for free. Design of a two way slabs for punching shear resistance. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems. Reinforced concrete design 1 design of slab examples and. Design procedure steps for one way slab slab design steps. The design procedure for a uniformly loaded one way reinforced slab can be divided in the following steps. Standard deviation for compressive strength of concrete with example pdf. Oneway slab design procedures and design example civil. Cover slab design structural engineering general discussion.
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. Design of reinforced concrete structures ii two way slabs 1 1. Two way slab design by direct design method as per aci 31811. If slab is supported on all four sides and r shorter side longer side one way slab. Design criteria there are three criteria which must be considered for the design of a conventional one way slab system.
The following example illustrates the example building. These materials are originally located at different websites. Ce 433, summer 20 slab design example 1 5 design a one. The following simplified design is valid when length2width of slab and for 15ft or 4. Main flexural reinforcement for the oneway slabs is placed in the direction parallel to load transfer, which is. 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. For example, the code requires stirrups in most beams, but specifically exempts slabs. The slab is without drops and is supported internally and on the external long sides by square columns. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. A civil engineer should study these lectures and materials for structural engineering acumen. How to design a two way slab free download as powerpoint presentation. 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. The main objective of this project is to analyze and design a multistory building 3ddimensional reinforce concrete frame, the design of reinforced concrete slabs, beams, columns, footings and. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan.
The program is developed around the robust computational core of two popular programs ptdata. Example design of two way edgesupported solid slab. Comparison of one way and two way slab behavior one way slabs carry load in one direction. Bending will take place in the two directions in a dishlike form. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Difference between one way slab and two way slab system.
This book focuses on the design of reinforced concrete members in building structures. The ratio lb which is less than 2 is known as two way slab. The basic design procedure of a two way slab system has five steps. Calculate factored moment and shear force by considering the onemeter width of the slab. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and public. Flat slab analysis, design and detailing pdf civil engineering. That is, the load factor at which the uls moment equals the moment capacity.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. To see their result for this slab we will find the load factor. One way slab is supported by two parallel beams or walls. Fundamentals of posttensioned concrete design for buildings. Nowadays, the quantity surveyor has to undertake various types of. Allowable stress design or working stress design wsd 2. Based on the stiffness requirement assume suitable depth and calculate the effective span. The following example illustrates the design methods presented in aci 31805 and ibc 2003. One way slab design criteria with design example according to aci code. Aci 31811 code provides two methods for two way slab design one of which is direct design method. One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray.
The program covers wide range of twoway slab systems and can be used for more complex slab layouts. Download code one way slab design procedures and design. Flat slab analysis, design and detailing pdf civil. Two way slabs are normally supported from four sides. Contains all design checks required by the american concrete institute code and all the conditions that must be met during the design process. Design of a two way rcc slab structural engineering forum. One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. Chapter 3 design of rectangular beams and oneway slabs. Posttensioned concrete design spreadsheet program a pdh.
Reinforced concrete design 1 design of slab examples. Concrete slabs are commonly divided into the following types. I have developed a microssoft excel software for design of a two way rcc slab. Posttensioned oneway slab pennsylvania state university.
Symbol description units a area of column crosssection m2 a, b, c plan dimensions of slab supported on several sides m d dissipation of internal energy knm e expenditure of energy by external loads knm. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one way and two way slabs as per is 456. 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. The role of quantity surveyor in current construction sectors. Since this is the input for the the exterior portion of the slab use exterior slab for the name. 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. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in. Bending will take place in the two directions in a dishlike fo. Rectangular beams and one way slabs page 2 of 9 two methods. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for one way and two way slabs as per is following are the rcc slab design and detailing guidelines.
The reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. The output of the program for the slab in the example is shown in the following pages. 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. Summary of bill of quantities civil works bar bending schedule. Flat slab analysis and design pdf flat slab design pdf 1. Two way joist waffle slab design approach and methodology two way joist slab often called two way ribbed slab or waffle slab is an economical floor system when the spans are. Following are the rcc slab design and detailing guidelines. One way slab being supported on two opposite sides only leads to the structural action in single direction. Two way concrete slabs with openings the static system and the design of reinforcement. 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. 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. Slab support condition solid slabs continuous at one end solid slabs continuous at both ends simple span solid slabs cantilever.
Practical yield line design 2 notation symbols the symbols used in this publication have the following meaning. Distribute moments transverse at critical sections to column and middlestrip and if. Here ratio of longer span of slab to the shorter span of slab is greater than 2. Assume partitions cannot be damaged by deflections.
The proposed slab system must meet the current code. One way spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Oneway and twoway slabs oneway slabs transfer the imposed. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. 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. One way slabs are normally designed with tensile steel ratios well below the maximum permissible value to have tension failure. Oneway and twoway slabs university of asia pacific. They may be supported on two opposite sides only fig. 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 slabs transfer the imposed loads in one direction only. Beams of width and depth are provided on all column lines. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2.
It has, however, been demonstrated that equally good structures can be achieved in unbonded posttensioning by suitable design and detailing. 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. One way slab design excel sheet civil engineers pk. 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. A oneway slab is defined for purposes of this book as a flexural member with depth. One way slab is a slab which is supported by beams on the two opposite sides to carry the load along one direction,ratio of longer span ly to.
Design of one way slabs the structural action of a one way slab may be visualized in terms of the deformed shape of the. Part two is an exampleintensive course, with key concepts introduced along. Twoway concrete slab with beams spanning between supports. The one way shear capacity for the ribbed slab portions shown is permitted to be increased by 10%. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Difference between one way slab and two way slab simple. Rc slab design ec2 worked example shear and deflection checks duration. The pca computer program pcaslab can be used to expedite the design of different slab systems. A reinforced concrete slab is treated as one of the most crucial elements.
Pdf design calculation design of one way slab slab s1. Project report on design of a residential building according. Sandeep k shrivastava department of civil engineering. Analysis and design of slabs one way civil engineers pk. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3.
The first reinforced concrete design manual formerly titled aci design handbook was developed in. Rectangular beams and oneway slabs page 3 of 9 design of rectangular beams and oneway slabs continued a. Ce 433, fall 2006 slab design example 5 6 f s e s e s 0. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Download free excel spreadsheet for concrete design. For flat plates and slabs the column connections can vary between. How to design two way slab with coefficient method in excel sheet. Pdf slabs are the flooring systems of most structures including office. Manual for the design of reinforced concrete building. One way and two way slab reinforcement in detail at sit duration.
The basic design procedure of a twoway slab system has five steps. Bend length at the end of the reinforcement bar beam has to be. It is not the intention of the present report to express a preference for one type of posttensioning or the other. Ultimate behavior of one way spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Here are the steps for the design procedure for one way slab in steps.
One way and two way slabs one way slabs transfer the imposed loads in one direction only. Determine the loads based on the buildings parameters section d. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Chapter 3 design of rectangular beams and oneway slabs 12. Slabs are usually used in floor and roof construction. Download book pdf structural design guide to the aci building code pp 3754 cite as. Generally, there are two types of slab which are one way and two way slabs. Reinforced concrete slab design and detailing guide is456. Design of oneway reinforced concrete slabs class notes and examplepage 1 of 6 notes on designing oneway slabs aci 318 ch.