Mammoet said: “The main advantage offered by the PTC’s design lies in the opportunity it offers for transport of all crane sections as standard 20 or 40ft containers, with a maximum weight of 30.4t. The containerized sections can be transported in the customary manner, thereby obviating the need for special transport – and resulting in considerable savings in transport times and costs.”
The PTC is primarily designed for the erection of columns, for example in operational plants that offer only restricted space to rig and operate the crane, as well as for longer construction projects and quick movements of heavy loads.
Mammoet again: “The PTC’s rigid and sturdy ring construction allows the crane to be moved quickly to a new location; the crane can be relocated within one day (on its own crawlers). The superlift configuration is a unique configuration that enables heavier loads to be lifted with any specific weight of counterweight. The ballast is connected to winches and positioned on the ring in the normal configuration. The winches can be used to lift the ballast and place it behind the ring, thereby offering a larger working radius for lifting loads with the same ballast, or for heavier loads with less ballast. Using the superlift obviates the need to dismantle the ballast blocks once the load has been lifted and transferred to its new position.”
The PTC-DS (double stacked) version is an upgrade of the PTC that involves the installation of stronger boom sections on the crane’s main boom. Depending on the boom configuration, the capacity of the crane is increased by 15 to 35%. The DS version is also fully containerised (dividing the boom sections lengthwise enables the sections to be transported as standard containers).
Mammoet also plans to upgrade its ultra-heavy lift MSGs and Platform Ring Heavy Duty.
The first MSG is currently being upgraded at Mammoet’s headquarters in Schiedam, the Netherlands where the crane’s lifting capacity is being increased to 3,000t. It is also being redesigned for more rapid assembly and dismantling. The addition of 12 extra jacks, a reinforced boom, an increase in the counterweight ballast and winches with a higher line pull will , says Mammoet, result in a considerable increase in the lifting capacity of the Platform Ring Heavy Duty.
