The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is A. Less than 1 B. Equal to 1 C. Greater than 1 D. Less than 1 in beams but greater than 1 in channels

The correct answer is: A. Less than 1.

The web is the central part of a steel rolled structural beam or channel, while the flanges are the parts that extend from the web. The thickness of the web is typically much less than the thickness of the flanges. This is because the web is not subjected to as much bending stress as the flanges. The flanges are what carry the majority of the load, so they need to be thicker in order to resist the bending forces.

Here is a diagram of a steel rolled structural beam:

As you can see, the web is the central part of the beam, and the flanges are the parts that extend from the web. The thickness of the web is much less than the thickness of the flanges.

Here is a diagram of a steel rolled structural channel:

As you can see, the web is the central part of the channel, and the flanges are the parts that extend from the web. The thickness of the web is much less than the thickness of the flanges.

I hope this explanation is helpful!