RA a 6. A part of the structure for a factory automation system is a beam that spans 30.0 in as shown in Figure P5-6. Loads are e applied at two points, each 8.0 in from a support. The left load F₁ = 1800 lb remains constantly applied, while the right load F2 1800 lb is applied and removed fre- as the machine cycles. quently -8 in F₁ = 1800 lb = 14 in F₂ = 1800 lb 8 in B C 4X2 X 1/4 40 mm D Steel RD tube Beam cross section FIGURE P5-6 (Problems 6 and 23)