Page 46 - Wire Rope News & Sling Technology






Page 46 - Wire Rope News & Sling Technology
P. 46

continued from previous page       a lower capacity. However, in this case,   lier project, thus, additional testing for
         funicular railway in the world”.   Modulift re-rated the capacity to 364t   these was not required.
           The track was laid by fellow Swiss   working load limit (WLL) with +1.5 dy-  Also included within the scope of work
         company  Rowa,  a  provider  of  logistics   namic amplification factor (DAF). The   was the supply of new bolts and prepa-
         services for tunnels, railways, and other   drop links were re-rated to 200t WLL,   ration  of  a  calculations  report  so  DNV
         projects, which devised a configuration   also with 1.5 DAF, and new data plates   could  carry  out  verification  against  its
         of  hoists,  rigged  beneath  its  displace-  were added accordingly.  Loadout, Transport and Installation of
         ment machine. The four GCH2500/2NF   Chris Schwab, Account Executive at   Subsea Objects criteria (DNV-OS-H206).
         hoists were integral to installation of   Modulift,  explained that the identical   Unlike Modulift’s standard spreader
         the track sections and concrete railway   spreaders’ original DAF was 1.8. He   beams that are manufactured using cir-
         structure. They were utilized individu-  added: “The principle reason for refur-  cular hollow sections, the subsea range
         ally and in multiple use depending on   bishing the beams was so they could be   has an open section design, suitable for
         the varied shapes and sizes of load. The   reused on another project that required   water submersion  by eliminating the
         maximum load capacity of the machine   an additional strut to achieve a new   risks of cavity or pressure issues. They
         was  limited  to  6.5t,  however.  Lukas   span, and they needed to be re-rated to   are  finished  with  a  three-coat  paint
         Bühlmann,  of  GIS,  said:  “The  hoists   a higher capacity, yet lower DAF.”  system that is based on a two-pack ep-
         were operated by bellybox remote con-  It was necessary to manufacture new   oxy paint system suitable for the ma-
         trol. Smooth running ensured exact po-  0.95m struts for each beam and shot-  rine heavy lifting environment.
         sitioning of loads, many of which were   blast all existing components. Exten-  The physical size of the manifolds—
         long and bulky. The hoists, which were   sive testing was conducted on  welds,   fabricated in Ravenna, Italy—meant
         designed  for  intensive,  everyday  use,   plus new  spans and capacities. The   that they could only be brought offshore
         completed lifting tasks reliably, despite   drop links had already been tested to   via a barge. Ground loading and crane
         being exposed to the elements in chang-  a sufficient capacity as part of an ear-  capacity issues on site resulted in a re-
         ing weather conditions.”
           He added: “Actually, once rigged, the
         project didn’t place over exertion on our
         hoists. For example, they could connect
         to loads by the standard hooks and pick
         points were readily available, even when
         all four hoists needed to be employed at
         the same time. We were honored to be
         associated with such a landmark proj-
         ect, although we are humble and mod-
         est as to our involvement; the project
         was a spectacular feat of construction
         and engineering in its own right.”
           The railway has been operational
         since  December 2017; three months
         after the GIS hoists completed  a six-
         month stay on the project. It has taken
         winter  sportspeople and hikers  from
         the valley up into the mountain beauty
         spot. The  automatic levelling  system
         ensures passengers enjoy breathtaking
         views in complete comfort, despite the
         considerable slope variations.
           Rowa’s displacement machine, which
         weighed 60t, travelled on a temporary
         rail  structure  to lay the track  at a
         rate of 12m per day. The entire plan-
         ning and building phase of the project
         spanned 14 years.
         Modulift Refurbishes
         Subsea Beams for Oil and
         Gas Project
           Below-the-hook equipment manufac-
         turer Modulift recently refurbished two
         subsea spreader beams for a major sub-
         sea installation contractor before they
         were used to lift 260t and 280t manifolds
         for a field development offshore Libya.
           The  standard Modulift  SUB  380
         beams originally offered up to 380t at   Modulift  re-rated  the  capacity of the beams to  364t  working load limit (WLL) with  +1.5
         9m or 30 ft. and up to 16m or 52 ft. at   dynamic amplification factor (DAF).

         46     Wire Rope News & Sling Technology   June 2018
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