1.18 Determine the smallest safe cross-sectional areas of members CD, GD, and GF for the truss shown. The working stresses are 140 MPa in tension and 100 MPa in compression. (The working stress in compression is smaller to reduce the danger of buckling.) 6m 4m 4 m E 6 m H 6 m 6 m F 6m 140 kN 140 kN D.

The turnbuckles in the diagram shown are tightened until the compression block DB exerts a force of 12,365lb on the beam at B. Member DB is a hollow shaft with an inner diameter of 1.0 inch and outer diameter of 2 inches. Rods AD and CD each have cross-sectional areas of 1.1 square inches. Pin C has a diameter of 0.78 inch. Determine the following: a.The axial stress, in psi, in BD. b.The axial stress, in psi, in CD.c.The shearing stress, in psi, in pin C.

Include the diagram. Urgent

a) Determine the tensile force T’ in the rope on the side connected to joint B: b) Determine the internal compressive normal force ƒBC in the tube BC: c) Determine the horizontal reaction force Rx and the vertical reaction force Ry in joint A: d) Determine the moment M of the center of bar AB: e) Determine the compressive stress σBC in the tube BC: f) Determine the critical load Pc for the tube BC: g) Which of the following statements about the tube BC is correct: A. The tube BC fails due to yielding B. The tube BC fails due to buckling C. The tube BC fails due to both yielding and buckling D. The tube BC is safe against both yielding and buckling h) Pin C has a diameter of 30 mm; calculate the shear stress τ of the pin C, when considering one cross-section for shear stress calculation: