The twin 40’quayside container crane is ZPMC’s newest design, offering fast loading and unloading to meet the demands of macro-scale vessels．ZPMC has signed a contract to provide Dubai with four(4)twin 40' container cranes by early 2005．The new crane can boost productivity by 50％ if loading and unloading techniques are improved accordingly．

Main features：

 1．The re are two independent hoisting system sets，connected by the upper sheave of the trolley and two standard detachable telescopic spreaders．The spreader headblocks can change relative positions (separating，folding and‘V’shape) via oil cylinder to hoist two 40’ containers．

2．The crane does not simply unite two sets of hoisting machinery．One of its significant features is the special differential hoisting gear reducer．The reducer may dissociate and superpose power--that is，it can distribute the output power of the two motors to the two spreaders, as well as direct all the power to one spreader．Thus，the crane can offer high speed and high efficiency while using one spreader.