Crane-supporting Steel Structures Design Guide 4th Edition 2021 -

Copes (web cutouts at girder ends) were a common fatigue crack source. The 4th Edition provides new prescriptive geometry for copes (radius ≥ 1.5 inches, no sharp reentrant corners) and requires non-destructive testing (NDT) for all welded brackets supporting cranes over 15 tons.

The 4th edition clarifies the tension between AISC tolerances (Code of Standard Practice) and CMAA (Crane Manufacturers Association) tolerances. Copes (web cutouts at girder ends) were a

The 3rd Edition used a generic impact factor (e.g., 25% for electric cranes). The 4th Edition refines this based on: Copes (web cutouts at girder ends) were a