The maximum length of the loads is not limited to the size of pallets or containers. 

The possibilities of it embarks they exceed that length, in the measure in that the width allows to move the volume inside of the space of the they will put, whose width can exceed 400cm.

I weigh maximum for volume: 

The aerial companies establish, for itself, the limits for weight concentration for area. As the loads are embarked in pallets or containers, the weight concentration is distributed by the area of these devices.

However, the makers' recommendation is for a maximum weight of 765kg/mē in basements of passengers' airplanes.