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TDKv Dienstleister für Kranvermieter aus Detmold 1101 Beiträge Admin 
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Veröffentlicht 02.06.2005, 12:33 - 000 - in "Third PTC set for South America" - [378]
Huisman-Itrec has completed construction of Mammoet’s third Platform Twin Ring Containerized (PTC) crane, a 1,600t capacity ring-mounted lattice boom rig. The latest unit is now undergoing testing at Mammoet yard in Schiedam in the Netherlands. It will then go to Brazil for its first project - exchanging a refinery reactor near Santos. With a maximum boom and jib combination length of 200m, the PTC is mainly designed for the erection of columns, Mammoet says. On full boom it can lift 190t out to a radius of 32m, with 1,500t maximum counterweight. Main boom is 97.3m long and gross weight is 2,100t. The key feature of the PTC cranes is that they can be broken down into sections that fit into 88 standard sized (20ft or 4ft) containers. This means that no special transport is required. To simplify assembly of the crane, it has a double backmast and the winches remain reeved during transportation. To make reeving easier, the dead end of the wires is a swaged socket instead of open wedge sockets. The swaged socket is small enough to be reeved through all the sheaves without dismantling the socket. It is then connected to the dead end connection. Lebus drums aid smooth spooling. The upper structure of the ring consists of two longitudinal beams, connected by quick connection pins to a transverse beam at the front. The power pack, lower ballast beam, upper ballast beam, several winches, backmast erection frame, boom stops and operator cabin are all mounted on the longitudinal beam. All components are a modular design and connected by quick connection pins to speed assembly. It takes eight minutes for the crane to rotate 360 degrees. The winch speed is 80m/min. Material needed for a PTC: 1,000t of steel for the structure 2,100m of cables for electrical installations 5,300m of 50.4mm wire rope 2,650m of 30mm wire rope 1,500t of steel for the counterweight 1280m of hydraulic hoses 6,000 litres of hydraulic oil 6,000 litres of paint Source: Cranes Today ___ Carsten Thevessen
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TDKv Dienstleister für Kranvermieter aus Detmold 1101 Beiträge Admin
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Veröffentlicht 29.11.2005, 13:31 - 001 - in "Third PTC set for South America" - [605]
Mammoet is to commence the design and construction of a fourth PTC (Platform Twin Ring Containerized). Construction work will begin immediately. The crane is expected to be operational at the end of 2006. The 1600 tonne capacity PTC will be the eighth ring crane in Mammoet’s fleet and one of the world’s largest mobile cranes. The main advantage offered by the PTC’s design, according to Mammoet, lies in the opportunity it offers for transport of all crane sections in standard 6 or 12 m containers, with a maximum weight of 30.4 tonnes. The containerized sections can therefore be transported in regular containers, eliminating the need for special transport and resulting in considerable savings in transport times and costs. Mammoet says the PTC is easy to manoeuvre, and can be operated in congested areas. The crane 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. The PTC’s ring construction allows the crane to be moved quickly to a new location and it can be relocated within one day (on its own crawlers). The superlift configuration enables heavier loads to be lifted with any specific weight of counterweight. 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 eliminate the need to dismantle the ballast blocks once the load has been lifted and transferred to its new position. Load after load can be lifted and repositioned; after each lift the ballast is placed on the ring and the crane moves into position for the next lift. The lifting capacity of the crane, depending on the boom configuration, is increased by 15 to 35% compared to the previous PTC. The DS (double stacked) version is also fully containerized with boom sections divided lengthwise to allow transport in standard containers. Mammoet has also decided 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. The crane’s lifting capacity is being increased to 3000 tonnes and 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 result in a considerable increase in the lifting capacity of the Platform Ring Heavy Duty. Source: KHL.com ___ Carsten Thevessen
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TDKv Dienstleister für Kranvermieter aus Detmold 1101 Beiträge Admin
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Veröffentlicht 06.03.2006, 18:23 - 002 - in "Third PTC set for South America" - [684]
Mammoet, the worldwide operating heavy lift specialist, has shown its PTC I fitted with the new Double Stacked (DS) boom for the first time. The crane was tested intesively in the end of February. So the first PTC-DS will be ready for working at an undisclosed location in the UK later this month. Technical staff from Mammoet and Huisman-Itrec were leading the load tests, witnessed by the client and independent international surveyors from Lloyds and TüV. The tests included 121 m and 79 m of DS main boom, runner and 600 and 1,600 tonne capacity boom heads. Overload tests (125%) were performed, for example, lifting 278 tonnes on the 600 tonne head installed on the 121 m boom at 104 m radius. Maximum test lifting (125%) reached 2,000 tonnes on the 1,600 tonne head installed on the 79 m boom at 17.6 m radius. ___ Carsten Thevessen
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