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Edition 47 12-17
12
On-Highway Trucks
Frame Selection
Standard Frame Not Reinforced
SM = 21 in
3
RBM = 2,520,000 lb
SM= SectionModulus is based on the cross sectional area of the frame and its distance from the neutral axis of bending.
RBM = Resistance to Bending Moment = SM × Steel Strength = SM × 120,000 psi for All Cat Frames.
Optional Reinforced Frame
SM = 28.82 in
3
RBM = 3,458,580 lb
Optional Reinforced Frame
SM = 40.45 in
3
RBM = 4,865,748 lb