oh okay @BenLewis , now I understand what you were trying to explain. Actually the reason why I was getting confused was that in pakistan, the fabricators fabricate the I beam according to their own desired sizes. I am sharing some pictures with you. As you can see in these pictures that the I beams have a size of 6" x 3" and a thickness of 2.5 mm. This is the same structure on which you guys helped me out in performing the simulations.
So what I wanted to ask was that is the " I beam of 14kg/m " considered lightest commercial I beam throughout the world or just for particular countries?
Secondly as I told you that the fabricators in pakistan make the I beam according to their own sizes as I have shown you that the thickness of 2.5 mm has been used. So is this a bad practice? I mean would it have any negative side effects?
