the lifting capacity of stahl cranesystems single girder suspension cranes ranges up to 10,000 kg. suspension cranes in neighbouring bays can be connected the crane interlock functions completely free of jolts and knocks......the lifting capacity of stahl cranesystems single girder suspension cranes ranges up to 10,000 kg. suspension cranes in neighbouring bays can be connected the crane interlock functions completely free of jolts and knocks. the hoist can travel onto the neighbouring crane together with its load and can reach any destination in the interlocked system.