Problem 1. The roof truss shown in Figure is pinned at point A, and supported by a roller at point H. Determine the force in member DG. 55 kN 45 KN 2.5 m 1.5 m 1.5m 2 m C 2m E 2 m G2m 90 KN Answer: FDG = 18.14 kN tension

The portion of the truss shown represents the upper part of a power transmission line tower. For the given loading, determine the force in each of the members located above members HJ. State whether 2. each member is in tension or compression. Ans: AB = DF = 2.29 kN T; AC = EF = 2.29 kN C; BD = 2.21 kN T; BC = DE = 0.60 kN C; BE = EH = 0; CE = 2.21 kN C; CH = EJ = 1.20 kN C %3D

The steel truss (E =200 GPa) shown in figure below has a cross-sectional area of 1920 mm². Determine: a. The largest allowable load F if the change in length of member BD is not to exceed 1.6 mm and a factor of safety of 2.5. b. The displacement of support D due to the load calculated in part a. 5m 6m A C F

A Howe scissors roof truss is loaded as shown.  Determine the forces in members GI, HI, and HJ.  F1 =2kN  h = 1.5m