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2018 July August Marina World

  • Text
  • Marine
  • Marinas
  • Decking
  • Pontoons
  • Docks
  • Pontoon
  • Poralu
  • Berths
  • Products
  • Concrete
The magazine for the marina industry


LIFTING EQUIPMENT INTEGRAL MANUFACTURER FOR MARINAS AND SHIPYARDS During 2017 GH Cranes & Components has installed several boat hoists in different parts of the world, continuing with its worldwide expansion strategy and keeping its strong position in Spain. Out of our 4 last installations, 3 of the units include Electronic Steering system which allows our clients to work more efficiently by using 4 different steering modes controlled by PLC: 2WD: 2 front wheels steering 90° + 2WD: Lateral displacement + 2 right wheels steering 45° Crab: Both diagonals running Polar: 360° Turning The last one, commissioned in Jan 2018, is equipped with Polar Mechanical steering system which is appropriate for the configuration of this specific marina in Mallorca. Bº Salbatore s/n 20200 Beasain, Gipuzkoa (SPAIN) / T: +34 943 569 176 / /

PONTOON/DOCK SYSTEMS & DECKING The L-shaped floating pier in Donsö near Gothenburg is installed in a water depth of 17m (56ft). As can be seen below, it is used to moor large commercial vessels but a similar system could be adopted for megayacht berths. Size no obstacle for floating concrete pier system In a market where yachts are getting longer, wider and heavier, and superyachts are ever becoming super-sized, heavy-duty floating pontoon and breakwater technology helps to shape future-proof marinas. SF Marina, the long established leading designer and manufacturer of concrete pontoons, floating breakwaters and bespoke marinas, uses its experience to continuously push the boundaries of floating technology. One recent project example, Donsö deep water harbour near Gothenburg, Sweden, draws on the expertise that SF has acquired in the marina sector to create a system for commercial use. In turn, however, the installation reveals the possibilities for floating megayacht pontoon systems in the leisure harbour environment. The Donsö system is designed for fishing and commercial fleets and utilises some of the largest pontoons on the market. The pontoon system is installed in a water depth of 17m (56ft), which means it can safely accommodate vessels with a draught of 10 to 12m (33 to 39ft). Opting for a floating pier had significant advantages. “It is not just that it would be very difficult and costly to build a 10m [33ft] high pier at this location. There is a significant difference between a floating pontoon and a permanent pier as far as the impact on the environment is concerned,” says SF Marina CEO Michael Sigvardsson. Floating pontoons of this size gain a protective breakwater effect, and spaces are created beneath the pontoons that provide the conditions for small fish and plants to thrive. The main pontoons measure 100 x 10m (328 x 33ft) and the ‘gangplank’ pontoon is 25m (82ft) in length. This provides 100m (328ft) of pier on the outside, 95m (312ft) on the inside and 35 and 10m (115 and 33ft) respectively on the sidewalls; a total of 230m (754ft). Each 25 x 10m (82 x 33ft) pontoon section is 1.8m (6ft) high and weighs almost 200 tonnes, meaning that the main pontoons weigh a combined total of almost 800 tonnes. “The whole of this is anchored using an anchor weighing a total of 360 tonnes and 800m [2,625ft] of 50mm [2in] diameter cable. This means that you need to be very precise, both when doing the calculations and when performing the installation,” explains SF Marina project manager Stig Jansson. Everything was manufactured at Wallhamn, Tjörn, at SF Marina’s production plant, and then transported in several batches to the Gothenburg archipelago. Donsö’s new harbour opened in May and has already found four regular customers, all fishing vessels with home ports in Denmark. Additional infrastructure such as supplies and fuel will significantly boost the financial success of the venture, and the 130m (426ft) pontoon is just the beginning. The vision includes two further pontoons of similar size to create 600m (1,968ft) of berthing (at both sides of each pier). Significantly larger vessels could then be accepted. - July/August 2018 39

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