Two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along both directions, it is known as two way slab. The procedure of the design of oneway slab is the same as that of beams. Flat slab analysis, design and detailing pdf civil. These materials are originally located at different websites. More detailed advice on determining design li fe,actions, material properties, methods of analysi s. Solid slab free download as powerpoint presentation. The two classifications are one way slab and two way slab.
Design procedure the basic design procedure of a twoway slab system has five steps. 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. Manual for design and detailing of reinforced concrete to the code. The following section describes the design procedure for roof slab, silo wall, silo hopper.
Ce 433, summer 20 slab design example 1 5 design a one. Design of reinforced concrete structures ii twoway slabs 1 1. 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. Reinforcement detailing of a slab is done based on its support conditions. One way simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Total load is nothing but, w i can say, in this case which is. Reinforced concrete design 1 design of slab examples and.
One way simplysupported and continuous solid slab bending. When slab is supported on two opposite sides only, total load is carried along the perpendicular direction of supporting beams. Parameters include support conditions nine cases, span ratios lalb 0. Design of reinforced concrete structures ii twoway slabs. Slabs may span in one direction or in two directions and they may be supported on monolithic concrete beams, steel beams, walls or directly by the structures columns.
This paper focuses on analysis of twoway ribbed and waffle slabs with hidden beams. For 1m slab width, moment, shear force, one way continuous slab for continuous slab, moment and shear force can be obtained from table 3. 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. Assume partitions cannot be damaged by deflections. A discreteelement method of multipleloading analysis for. Generally, there are two types of slab which are one way and two way slabs. Simple span reinforced concrete slab bridge rating example. Twoway posttensioned slabs with bonded tendons by kenneth b. A discreteelement method of multipleloading analysis for twoway bridge floor slabs by john j.
Other types of rectangular slabs and nonrectangular. Design procedure steps for one way slab slab design steps. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. The twoway slab shown in figure below has been assumed to have a thickness of 7. They may be supported on two opposite sides only fig. Flat slab analysis and design pdf flat slab design pdf 1. Appendix a costeffectiveness selection procedure in the roadside design guide, aashto, 2006. Pdf cost optimum design of reinforced concrete simply. If none of the values satisfies, you need to change d. Analysis and design of one way and two way slab in staad. Bending will take place in the two directions in a dishlike form. Here are the steps for the design procedure for one way slab in steps. Chajjas and verandahs are an practical example of one way slab.
Analysis and design of slabs one way civil engineers pk. Computational analysis of rcc slab simply supported ijrte. A civil engineer should study these lectures and materials for structural engineering acumen. Design of oneway slab free download as powerpoint presentation.
Lb2 is one way slab lb download free a spreadsheet to design and analysis staircase and details of the drawing. Reinforced concrete slab and beam design software adaptrc 2017 product overview an easytouse and learn software for the design, analysis, and investigation of reinforced nonprestressed concrete beams, beam frames, slabs and floor systems a must have production tool in every structural engineering office. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. Section 8 guidelines for guide rail design and median barriers.
Reinforced concrete slabs are used in floors, roofs and walls of buildings and as the decks of bridges. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 20 psf, and unfactored live load 40 psf. In case of one ways slabs, the aci approximate analysis is applicable to one way slab system where a one way slab is continuous with a one way slab. Reinforcement detailing of reinforced concrete slabs.
Design procedure the basic design procedure of a two way slab system has five steps. In order to simplify the analysis and to be able to use the superposition principle for evaluating the effect of load combinations, linear analysis is generally adopted even though concrete slabs normally have a pronounced nonlinear response. Slabs are constructed to transfer loads to the beams with. 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. Difference between one way slab and two way slab simple. Chapter 3 design of rectangular beams and oneway slabs 12 h a 12 strip in a simply supported one way sl ab. Additional information for shear wall and transfer structures is given in cl. Distribute moments transverse at critical sections to column and middlestrip and if. No beam, free layout and large windows create bright and open spaces in flat slab floors.
Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Pdf the paper presents the cost optimization of reinforced concrete simply supported oneway slabs under uniformly distributed. The ratio for a twoway spanning slab should be based on the shorter span. The floor system of a structure can take many forms such as in situ solid slabs, ribbed slabs or precast units. Oneway and twoway slabs university of asia pacific. The post one way reinforced concrete slab how to design it. A reinforced concrete slab is built integrally with its supports and consists of two equal spans, each with a clear span. Two way slab design by direct design method as per aci 31811. Oneway slab twoway slab flat plate flat slab grid or waffle slab 7. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. The design procedure for a uniformly loaded oneway reinforced slab can be divided in the following steps.
Reinforced concrete slab and beam design software adaptrc. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Flat plate concrete floor system does not use beams between columns or. These slabs are utilized in floors and roofs of buildings and usually combined with the supporting beams. Manual for design of slabs, pile caps and footings. Recommendations for finite element analysis for the design. Pdf the trend of construction of flat slab system is very common in.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Oneway and two way slabs one way slabs transfer the imposed loads in one direction only. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Beams of width and depth are provided on all column lines. Foundations 1 practical design to eurocode 2 the webinar will start at 12. One way slab design excel sheet civil engineers pk. Analysis of two way ribbed and waffle slabs with hidden beams. Slab may be supported on walls or beams or columns. The slab has to carry a distributed permanent action of 1. In this work the cost optimization design of rc oneway slabs was performed by the. These are the direct design method presented in chap. Bridge approach slab analysis and design incorporating elastic soil support presented by.
The two classifications are oneway slab and twoway slab. Pdf one way slab design nscp 2015 free download pdf. One way reinforcement in concrete slab is something we found very structurally explained in the video bellow. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3.
Pdf a simplified approach for analysis and design of. Oneway and twoway slabs oneway slabs transfer the imposed. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in. 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. Beams or slabs over free end supports, where a member is built into a masonry wall. Aci code allows the analysis of a particular floor of the building by considering free. Maximum moments of one way slabs if lylx design as a two way slab if lxly 2. The width of the clear zone lc varies with the speed, roadside slope and horizontal roadway alignment.
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. There are many methods that are used to analyze twoway slabs and the precision of. One way slab design procedure with example design of one. A one way slab is simply a very wide beam that spans between supports. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Right click the excel icon for the appropriate jurisdiction. 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. Left click save target as and save the file to a desired folder on users computer. A slightly deeper section is required but these stiffer floors facilitate longer spans and provision of holes. For those who do not know what are the des ign requirements of a slab. Design comparison of slab system by direct design method and equivalent frame. Ribbed slabs oneway joists introducing voids to the soffit of a slab reduces dead weight and increases the efficiency of the concrete section.
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. Slab slabs are an important structural component where prestressing is applied. In two way slab, the ratio of longer span l to shorter span b is less than 2. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. In this article, i will discuss one way slab design procedure with example. 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. The load on the slab is carried by the short span in one direction. The finite element method is commonly used to design the reinforcement in concrete slabs. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. Pdf design comparison of slab system by direct design method. Before we start the design of slabs, let us see what our words says related to your effective span. 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. When slab is supported at all sides and lengthwidth 2 of a slab panel.