Hey all! I have a project question I'm struggling on: The rigid structure ABD in Figure 1 is supported at B by a 35-mm-diameter tie rod (1) and at A by a 30-mm-diameter pin used in a single shear connection. The tie rod is connected at B and C by 24-mm diameter pins used in double shear connections. Tie rod H has yield strength of 250 MPa, and each of the pins has ultimate shear strength of 330 MPa. A concentrated load of P = 50 kN acts at D. Determine: (a) The normal stress in rod (1). http://img269.imageshack.us/img269/2382/question1a.jpg [Broken] My main problem is I am unsure where to place the reaction forces with regards to pins so that I can use moments and forces in the x and y direction to determine the force in the rod. Once i know this I can find the stress in the rod. Any help would be great!