The capacity requirements needed for the crane system your quoting (assuming your quoting one) is, by far, the most important item. Capacity helps a crane manufacturer determine:
-the type of system
-what size runways/bridges need to be used
-the maximum distance between two support locations
-the maximum cantilever that can be achieved
-the overall bridge rating requirements
-the number of supports needed
-what bridge spans can be achieved with that capacity
-floor rating requirements (free-standing)
-ceiling rating requirements (ceiling hung)
-trolley/endtruck requirements
see more at http://ping.fm/v5cF9…a-crane-system/
