Answer :
S-beams, wide-flange beams, and M-beams share the common dimension of having a cross-sectional shape resembling the letter "I," characterized by a central vertical web connected to horizontal flanges on either side.
These beams are widely used in construction and engineering for their structural integrity and load-bearing capabilities. Their common design facilitates efficient distribution of weight and resistance to bending or twisting forces.
The uniformity of their cross-sectional shape simplifies construction processes and allows for easy integration into various architectural and engineering designs. In essence, despite slight variations in dimensions and weight per unit length, the fundamental shape of these beams remains consistent, making them versatile and reliable structural elements.