Yes, you are correct, it should not start from zero for the web at the junction of web and flange. Thanks for your comment.

@@partheepanmvgrcivil4017 Thanks for ur reply.

The thickness is treated as rather thin. You can just get the method.

I have done exactly that. Area of triangle+area of rectangle=area of trapezium . I hope this helps you.

Yes it's wrong acc to me as well

Can you send me any link for Lipped C channel mkment of inertia and section modulus?

It is wrong

How can it be wrong. Looks ok to me.

@@tanzimhossain937 You see the video at 2:58. When he considered 150*6^3/12 in the first term then in the second term it should be removed some values. ok i give you the correct term Ixx = 150*6^3/12 + 2[63*6^3/12 + 63*6*(150/2-6/2)^2] + 2[6*50^3/12 + 6*50*(150/2-50/2)^2]

Hi Chen, Thanks for your observation. My understanding is that shear flow/stress are all internal forces developed within the section which opposes the external force.

Yes , you are right, it is a parabolic variation, since the lip is very small it can be approximated to triangular variation.

@@partheepanmvgrcivil4017 OK fine thank u so much sir

Thanks. I used Microsoft Whiteboard for the entire presentation and the sections are made in paint or MS powerpoint and copied and pasted in whiteboard.