Figure shows a boom and tie-rod arrangement supporting a load of 6 kN. The tie-rod is made of steel having a tensile yield strength of 400 MPa.
(a) What is the safety factor of the tie-rod with respect to static yielding?
(b) What is the safety factor of the tie-rod if the vertical rod is rotated 180° so that the 6-kN load acts upward?
(c) What conclusion do you draw with respect to the relative desirability of designing machines with column members loaded in tension versus loaded in compression?
