1.3-9 Find support reactions at A and B and then use the method of joints to find all member forces. Let c = 2.5 m and P = 90 kN.

The asymmetric simple truss is loaded as shown. Determine the reactions at A and D. Neglect the weight of the structure compared with the applied loads. Is the knowledge of the size of the structure necessary? 1L 60° Answers: Ay = i Dy= Dx= i i B 3L 60° 60° E y 1 1L L L L 30° x 4L D

Solve B Please fast

Determine the force in member BC of the loaded truss. The force is positive if in tension, negative if in compression. 2.5 kips 3.9 kips 4.6 kips Answer: BC = i kips

3. A planar truss is constructed of steel members, all of which have a cross-sectional area of 3000 mm?. Determine the nodal displacements, reactions and element stresses. G 2 m B D 2m 50 kN 460 kN