1. The problem statement, all variables and given/known data The symmetrical scissors truss is supported at point A and D. The support at D is a rocker bearing and does not produce a horizontal reaction. A, B, C, D, E, & F are pin joints. The members of the truss are not joined to each other where they cross. At A, the angle between AB and AE is 45 degrees and the angle between AC and AE is 26.57 degrees. The magnitude of the two loads, E and F are given as 192.6 kN and 135.8 kN respectively. L is equal to 3m. What is the magnitude of the reaction force at D? If the load at F has changed so that the vertical reaction at A is 125.4 kN: what is the magnitude of the axial force in members AB, CD and AE? 2. Relevant equations Sum of all moments = 0 Sum of all forces = 0 Sum Fx = 0 Sum Fy = 0 M=Fd 3. The attempt at a solution I worked out the three moment equations about B, C and E, however I have got too many variables to solve the equations.