How To Check Deflection Of Beam In Etabs

Deflection Check (Beams BS 8110) Beam (Structure) Building Engineering

Structural analysis and design software like ETABS have become essential in the engineering industry. ETABS is the most preferred software for structural analysis and design. As a structural engineer, it is important to understand the basics of ETABS for proper structural design. In this article, we will discuss the process of checking deflection of a beam in ETABS.

What is Deflection?

In structural engineering, deflection is the displacement of a structural element from its original position due to the action of external forces such as wind, earthquake, or other loads. Deflection can be measured in terms of vertical or horizontal displacement, depending on the type of structure. Deflection is important to consider when designing a building as it affects the stability of the structure.

Read More

How to Check Deflection in ETABS?

In ETABS, the deflection of a beam can be checked by performing the following steps:

Step 1:

The first step is to open the ETABS software and create a new project. After creating the project, select the ‘Beam’ option from the main toolbar and start drawing the beam. Make sure the beam is drawn in accordance with the structural design criteria.

Step 2:

After drawing the beam, apply the appropriate load cases to the structure. Load cases can be applied using the ‘Loads’ option from the main toolbar. It is important to assign the correct load cases to the beam to get an accurate analysis of the structure.

Step 3:

After applying the load cases to the structure, the next step is to run the analysis. This can be done by selecting the ‘Analysis’ option from the main toolbar. After running the analysis, the deflection of the beam can be checked from the ‘Results’ tab.

Step 4:

The ‘Results’ tab will display the deflection of the beam in terms of vertical and horizontal displacement. The deflection values can then be compared with the design criteria to check if the design is safe or not.

What are the Limitations of Deflection Analysis?

Deflection analysis is a useful tool when designing a structure, however, it has some limitations. Deflection analysis only considers the immediate action of the applied loads and does not take into account the long-term effects of the loads. Also, the analysis does not consider the effect of the self-weight of the structure, which can significantly affect the deflection of the beam.


In conclusion, checking the deflection of a beam in ETABS is a simple process that can be done in a few steps. Deflection analysis is important when designing a structure as it helps to ensure that the structure is safe and stable. However, it is important to keep in mind the limitations of deflection analysis when designing a structure.