Hi... Karthi sir, excellent explanation. Well done. Thank heaps. Its So happy to see in RU-vid. I would like to request that please go ahead further in all subjects of civil engineering. And my kind suggestion and obligations to you is please make your excellent and valuable videos to/ for non tamil speakers also ( sub titles or other way). I'm too much looking forward for your upcoming vedios. And my advance congratulations for k, m and b subscription and views. Thanks you so much once again.