A Strong Entrance into the 70 Tonne Range The GR-700XL-4 marks Tadano’s entrance to the 70 t range with a total redesign and upgrade from the traditional Tadano Rough Terrain style. This machine is the longest and strongest rough terrain crane in its class with a main boom length of 46.9m, which is usually reserved for the 90.7t class. Transportation of this unit was taken into consideration as it weighs in just under 45t, which makes it extremely easy to truck around.