What does a web do in a W shape beam?

In a W shape beam, commonly referred to as a wide flange beam, the web plays a crucial structural role by connecting the flanges, which are the horizontal top and bottom parts of the beam. The web is the vertical section of the beam that provides support against shear forces, but its primary function in relation to the flanges is to maintain the overall shape and integrity of the beam assembly.

By connecting the flanges, the web helps to distribute loads and ensures that the beam can effectively resist bending moments and shear forces. This is essential in maintaining the beam's structural performance under various loads in construction and engineering applications. The web, therefore, serves as a critical component that holds the entire beam assembly together, allowing it to function effectively in various structural systems.