Learn about Simply Supported Beam : Overhang to One Side : Point Load

Simply Supported Beam : Overhang to One Side : Point Load : (Fig. 3.20) Simply supported - a beam supported on the ends which are free to rotate and have no moment resistance Over hanging - a simple beam extending beyond its support on one end. Point loads are concentrated loads applied along the span of a member or the edge of a wall panel. Defining point loads may be accomplished graphically or in the spreadsheets. In this example, one get clear idea how to calculate reactions when a simply supported beam is having point load overhang on one side of the support. Reactions : Taking moments about B, we get (i.e. acting downwards) S.F.D. : Between C and A, S.F. =-W=constant Between A and B, S.F. = The S.F.D. is shown in Fig. 3.20 (b). B.M.D. : Between C and A, Mx=Wx, which gives MC=0 ; MA=Wa. Between A…

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Different types of stairs generally used in public and residential buildings

Learn Types of stairs : Stair, Straight flight stairs.Dog legged stairs.Open newel stairs.Quarter turn stairs.Bifurcated stairs.Geometrical stairs.Spiral stairs. See also Requirement of a good stair case Definitions of technical term used in stair case Types of stairs The following are the different types of stairs generally used in public and residential buildings Straight flight stairs. Dog legged stairs. Open newel stairs. Quarter turn stairs. Bifurcated stairs. Geometrical stairs. Spiral stairs. Straight flight stairs. It is the simplest type of stairs, and con­sists of one or in some cases two flights running in one direction only. These stairs are used, when the space available is narrow and long. Dog legged stairs. It is a very common and popular type of stairs and is used in public as well as residential buildings. It consists of two flights running in opposite directions, separated by a half space landing or a quarter space landing…

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Requirement of a good stair case

Requirement of a good stair case A stair should be well ventilated. It should have good approaches from all corners of the building. Every flight should be separated from the other by spacious and well ventilated landings. Each flight should have not more than 12 steps As far as possible winders should be avoided. If at all, they are to be provided, they should be provided at the bottom and not at the top. The width of the landing should not be less than the width of the stairs. The width of the stairs in residential buildings should no be less than 75 cm and for public buildings it should not be less 1han T25 m. The pitch of the stairs should not be more than 25° for making the ascent and descent easy. In order to obtain a satisfactory pitch, the following general rules are used to obtain the…

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Definitions of Technical terms used in stair case

Content of this article:definition stair case technical term:stairs,stair line of nosing case,rise,tread,nosing,fliers,winders,flight,landing,line of nosing,scotia block,string or stringers,headroom,Line of walking,Railing,baluster,Newel posts,pitch and soffit.            Definitions   Stairs. Stairs are steps arranged in series for the purpose of an assess from one floor to the other. Stair-case. The room or apartment in which stairs are enclosed, is called stair-case. Rise. It is the vertical distance between the two conse­cutive steps. The vertical portion of the step is called Tread. The horizontal portion of the step is called tread. The horizontal distance between the two consecutive risers is called Go, Going or Run. Nosing. It is the front edge of the tread which projects beyond the riser. Fliers.The rectangular steps of uniform shape and size are called Fliers. Winders.The triangular or wedge shaped steps, used for changing the direction are called winders. Flight. It is a continuous series of steps…

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Simply Supported Beam : U.D.L. over the whole span

A beam, Simply Supported Beam : U.D.L. over the whole span is a structural element that primarily resists loads applied laterally to the beam's axis. Its mode of deflection is primarily by bending. Classification based on supports In engineering, beams are of several types: Simply supported - a beam supported on the ends which are free to rotate and have no moment resistance. Structural loads or actions are forces, deformations, or accelerations applied to a structure or its components. Loads cause stresses, deformations, and displacements in structures. Assessment of their effects is carried out by the methods of structural analysis. Excess load or overloading may cause structural failure, and hence such possibility should be either considered in the design or strictly controlled. Simply Supported Beam : U.D.L. over the whole span

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ANALYSIS AND DESIGN OF A STRUCTURE

ANALYSIS AND DESIGN In a broad sense, the analysis and design of a structure consists of two parts: The first part deals with the determination of forces at any point or member of the given structure. The second part deals with the selection analysis and design of a structure suitable sections to resist these forces so that the stresses and defor­mations developed in the structure due to these forces are within permis­sible limits. The first part can be termed as "structural analysis" and the second part as "proportioning" or "dimensioning" of members . Before we can start the analysis, we shall require the entire details of the structure, loading and sectional properties. To proportion a structure, we must first know how it will behave under loading. Therefore, the process of analysis and design of a structure forms an integral part of any design.  In practice, the properties of mem­bers are…

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Forms of structure(beam,trusses arch and frames) in structure analysis

FORMS OF STRUCTURES Any civil engineering structure is conceived keeping in mind its intended use, the materials available, cost and aesthetic considerations. The struc­tural analyst encounters a great variety of structures and these are briefly reviewed here. One of the simplest structures is a, simply supported beam, supported on a pin at one end' and a roller at the other (Fig. 1.1a). Such a beam, it may be recalled from the fundamentals of strength of materials, is quite stable and statically determinate and transmits the external loads to the supports mainly through shear and moment. The other types of beams which are more complicated from the point of view of analysis are those with fixed ends and those that are continuous over supports (Figs. 1.1 b and c). As we shall see later, such beams are statically indeterminate and cannot be solved using equations of static equilibrium alone. For longer…

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SI Units for Structural Engineers

SI Units for Structural Engineers The international system of units SI (System Internationale units) Units for Structural Engineers, com­monly called SI, is being adopted allover the world as a uniform meas­urement system. While the complete transition from customary units to the SI system may take years, the use of SI (System Internationale units) Units for Structural Engineers units in the fields of en­gineering and science is proceeding rather rapidly, and it will soon be­ come necessary for the modern civil engineer to gain experience in using the SI system. Fortunately, the cl1~ngeover from the now common MKS units to SI units is quite simple, unlike the changeover from FPS to MKS units. In this book, SI units have been used throughout, with only mi.nor modifications, to suit the requirements of the engineering world. The basic and derived units for various categories of measurement are discussed in the following sections.  TYPICAL BASIC…

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Advantages and disadvantages of Reinforced cement concrete (R.C.C)

In this article : Learn Plain cement concrete, Reinforced cement concrete, Composite action of steel and concrete, Uses of Reinforced concrete, Advantages of R.C.C. ,Disdvantages of R.C.C. Plain Cement Concrete Plain Cement Concrete is a hardened mass obtained from a mixture of cement, sand, gravel and water in definite proportions. These ingredients are mixed together to form a plastic mass which is poured into desired shape moulds called as forms. This plastic mass hardens on setting and we get plain cement concrete. The hardening of this mixture is caused by a chemical reaction between cement and water. Plain cement concrete has good compressive strength but very little tensile strength, thus limiting its use in construction. Plain concrete is used where good compressive strength and weight are the main requirements and tensile stress are very low. Reinforced Cement Concrete Plain cement concrete has very low tensile strength. To improve the tensile…

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Characteristics of an ideal reinforcing material

Content of this article : Characteristics of an Ideal Reinforcing Material,Steel as Reinforcing Material has high tensile strength and elasticity.,Deformed Bars and Twisted Bars Characteristics of an Ideal Reinforcing Material The characteristics of an ideal reinforcing material are: It should be easily and cheaply available in bulk. It should possess high tensile stress and elasticity. Its thermal coefficient of expansion should be nearly equal to that of concrete to minimise thermal stress. It should have a long and durable life so that it can render service for longer time. It should be free from loose mill scales, loose rust and coat of paints, which reduce the bond. It should be capable of forming perfect bond or grip with concrete so that stresses are transferred from one material to the other.    Steel as Reinforcing Material The steel is commonly used as reinforcing material due to its following qualities. It possesses…

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