One of my clients was modifying a bridge crane. Based on calculations, I recommended the following for each of the two bridge beams: W30x108 with a C15x33.9 channel cap welded to the top flange. The bridge span was 60'-5" fron center to center of rails. The capacity of the hoist was only 15...
Is is reasonable to assume that the dynamic (live) load component of a stamping press is equal 50% of the dead weight of the press with tooling (die)?
The owner has stated that they have used this 50% value on prior press installations.
For example,
press weight = 640 kip
die weight = 70...
