Rails must be securely fastened to the beams while allowing for longitudinal thermal expansion.
Lateral forces from crane acceleration/braking are no longer uniform. The 4th Edition introduces: Rails must be securely fastened to the beams
Engineers often use capped channels (a channel welded to the top flange of a wide-flange section) or horizontal surge girders to increase the lateral stiffness and twisting resistance of the top flange. Web Overstress and Crippling Web Overstress and Crippling While not an “article,”
While not an “article,” the guide includes (chapters 7–10) that are better than most articles. These examples cover: Rails must be securely fastened to the beams
Often, crane runway girders are designed with a larger top flange than the bottom flange to manage top-flange buckling and lateral loads. The guide provides specific design formulas for these monosymmetric shapes. 3.4. Structural Tolerances
Even experienced engineers fall into these traps. The 2021 guide explicitly warns against: