Cantilever Beams Cantilever beams a structure follower of which one end is fixed and the other is free. This is one of the well-known type of beam use in trusses bridges and other structural member. This beam carry load over the length which suffers both shear stress and bending moment. This beam is immovable from both ends. It does not let vertical movement and rotation of the beam. It is only under shear stress and no moment produces in this beams. It is used in trusses and other structures. Types of the beam according to cross-section I beam T beam A T beam used in construction. It is a load-bearing structure of strengthened concrete wood or metal with a t shaped cross-section. The top of the t shaped cross-section functions as an overhang or compression member in fighting compressive stresses I beam. An I beam also known as H beam is a beam with an I or H shaped cross-section I beams are usually made of structural steel and are used in construction and civil engineering. Types of supports. Fixed Support. Fixed support is the most rigid type of support or I connection. It constrains the member in all I translations and rotations. The easiest example of fixed support would be a pole or column in concrete. The pole cannot twist rotate or displace it is basically restricted in all its movements at this connection.
Application Fixed supports are extremely beneficial when you can only use single support. The fixed support provides i all the constraints necessary to ensure the structure is static. It is most widely used as the only support for a cantilever. Pinned Support. A pinned support is a very common type of support and is most commonly compared to a hinging I civil engineering. Like a hinge a pinned support allows rotation to occur but no translation. Think of your elbow you are able to extend and flex the elbow rotation but you cannot move your forearm left to right translation. Application Pinned supports can be used in trusses. By linking multiple members joined by hinge connections I the members will push against each other inducing an axial force within the member. The benefit of this is that the members contain no internal moment forces and can be designed according to their axial force only. Roller Support. Roller supports can resist a vertical force but not a horizontal force. Roller support or connection I is free to move horizontally as there is nothing constraining it. Application. The most common use of roller support is in a bridge In civil engineering a bridge will typically i contain roller support at one end to account for vertical displacement and expansion I from changes in temperature. This is required to prevent the expansion I causing damage to a pinned support. Simple Support. Simple support is basically just where the member rests on an external structure. They are quite similar i to roller supports in a sense that they are able to restrain vertical forces but not horizontal forces. The I member simply rests on an external structure to which the force is transferred to. In this case, if you apply a vertical force I it will not be able to support it. An example is a plank of wood resting on I two concrete blocks. Application of beams. Beams are used in daily lifes for various purposes. There are some following examples of beams. Used as a g structural member in a structure. Used in bridges for the transportation of light. Used as a strap beam in a strap footing. They come in a wide range of sizes and shapes. Used as critical support trusses or the main framework in buildings.