The following video is about the design of channel section purlin.
1. For the design of industrial or I section purlin check the link given below:
[ Ссылка ]
2. For the parts of truss Check out the following link:
[ Ссылка ]
3. Check out this link for the design of circular column
[ Ссылка ]
4. For the design of staircase as per is 456:2000.
[ Ссылка ]
![](https://s2.save4k.ru/pic/ivejYMH-7I8/maxresdefault.jpg)