BEAM AND IT’S TYPES

A beam is a structural element that primarily resists loads applied laterally to the beam's axis. Its mode of deflection is primarily by bending. The loads applied to the beam result in reaction forces at the beam's support points. The total effect of all the forces acting on the beam is to produce shear forces and bending moments within the beams that in turn induce internal stresses, strains and deflections of the beam.  

 

Types of Beams

The different types of beams are:

 

 

1. Cantilever Beam:

A cantilever beam is a beam that is fixed from one end and free at the other end.

 

 

In the figure you can easily see that one end i.e. A is fixed and the other end i.e. B is free. So this beam is called as cantilever beam.

 

2. Simply Supported Beam:

A beam which is supported or resting on the supports at its both the ends, is called simply supported beam.

 

In the figure, both the ends of the beam is supported by supports, one support is at end A and the other support is at end B. this beam is known as simply supported beam.

 

3. Overhanging Beam:

In a beam, if one of its ends is extended beyond the support, it is known as overhanging beam.

As shown in the above figure, we observe that beam is extending beyond the support B, and hence this beam is called overhanging beam.

 

4. Fixed Beams:

A beam which has both of its ends fixed or built in walls is called fixed beam.

 

In the figure, both the ends of the beams are rigidly fixed in the walls, this type of beams are known as fixed beams.

 

5. Continuous Beam:

It is a beam which is provided with more than two supports as shown in figure.

 

Here we can see in the figure that the beam has more than two supports at A, B and C. This beam is called continuous beams.

 

Writer

Md. Nur Alam, Instructor

Daffodil Polytechnic Institute

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