6.9 Determine the force in each member of the Gambrel roof truss shown. State whether each member is in tension or compression. 600 lb 600 lb 600 lb D 300 lb 2 ft 4 in. 300 lb 6 ft C E G H 8ft 8 ft 8 ft 8 ft 8 ft- Fig. P6.9 member of the Howe roof truss sion. 30