Hi @Ramana ,
My gut is telling me that you might be overestimating the benefit you’d get from steel structure but I don’t know your building and maybe there’s a lot of concrete surface area. If you want to get an understanding for yourself, the HB Internal Mass component can be used to add more mass into your Room beyond that which is already a part of the Room geometry. You can see that the component even allows you to plug the _geo in for your column geometry in order to get the surface area correct.