If the maximum tensile force in any of the truss members must be limited to 28 kn, and the maximum compressive force must be limited to 37 kn, determine the largest permissible mass m which may be supported by the truss.

Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.