1. The problem statement, all variables and given/known data The beam ABC is1000LBs and its center of mass is given as 6.5ft to right of B. B is a pin joint. A & D are frictionless rollers. Find tension in cable. 2. Relevant equations Call the tension in the cable T. Trig shows us that the left-hand triangle is 45 degrees at ABD and the right-hand triangle is 15.5 degrees at BCD. Torque due to wt of load and mass of beam are clockwise and negative; torques due to T are ccw and positive. 3. The attempt at a solution So the torque at B should be: -(6.5ft)(1000Lb) + -(12ft)(3000LB) + (18ft)(sin15.5)T + (5ft)(sin45)T=0 This yields a T of 5114; the book shows the answer as 6770. What am I missing?