The figure shows a vertical rod A B labeled 1 attached to a vertical post B C labeled 2 by a flange at B. The length of member 1 is 1500 millimeters and the length of member 2 is 1000 millimeters. The load at B is P which equals 110 kilo newtons directed vertically downwards. The rod is attached to a rigid support at A and the post is attached to a rigid support at C.

To solve this problem, first consider equilibrium. Draw a free-body diagram around flange B.