There is limited guidance given in AS 4100 “Steel Structures” and AS 1418.18 “Cranes, Part 18: Crane runways and monorails” for the design of combined sections such as are found in crane runway girders. These comprise a universal beam (UB) or welded beam (WB) section with a parallel flange channel (PFC) attached to the top flange via welding between the PFC web and the UB/WB top flange. TN004 version 2 Sep 2010, authored by Tim Hogan, provides assistance with the design of such girders.
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