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Floats are independent and attached to the chassis by clamps or bolts. They are 100% foam filled making pontoons unsinka-
ble. Replacement if needed can be carried out without the need to dry-dock.
* Polyethylene floats (HDPE) are now most common due to their cost effectiveness and free maintenance.
* Aluminium floats are more suited to areas subject to strong current and floating debris.
* Fibre Reinforced Concrete (FRC) floats provide wave-attenuation capability when it is needed.
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SF Marina System Ab has been designing and manufacturing floating concrete breakwaters since 1984 after many years of manufacturing large concrete pontoons. We have installed them in a wide variety of sites in quite adverse conditions with no failure to date. The units installed are performing the functions we have designed for with great success. Our breakwaters are specifically designed for and are required to be moored with chains, sinkers and anchors.
Our Marina installation in Acapulco which is protected by one of our floating breakwaters was exposed to the hurricane Pauline some years ago without any damage. And the hurricane Floyd passed through our Marina installation at Charleston last september without any damage.
The geometry of this pontoons, in combination with our patented coupling and an advanced mooring system, makes our floating breakwater an excellent wave attenuator. This pontoons have been developed gradually over a number of years and today there are numerous reference-installations in use both in Sweden and abroad. The breakwaters from SF MARINA are all-concrete pontoons with all the advantages of high stability and buoyancy. The all concrete and styrofoam construction of the pontoon produces a very high degree of buoyancy thus making it virtually unsinkable. As a result of the use of high quality materials, coupled with a thorough manufacturing process, the pontoon enjoys a long life-span. Each standard pontoon is designed to accept electrical and water supply services. Normally, the pontoons would be moored using chains and blocks. This pontoons are first and foremost as a floating breakwater.
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Breakwaters
Concrete pontoon breakwaters have vertical walls and special bolts for wave attenuation. Specially designed for use in rough seas and for protection of the marina. Breakwaters are supplied with embedded extrusions for electricity, water and lighting connections. Fastened with strong-chained anchors, the breakwaters are connected to each other with elastic rubber couplings for long life and reduced wear and tear.
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BREAKWATERS
Martini Marinas’ floating breakwaters are designed to comply with the findings of detailed hydraulic experiments. The result is a wave-breaking structure shaped like a catamaran, which makes it extremely effective in countering the motion of the waves and dissipating the energy generated by their impact. To guarantee even greater stability, Martini Marinas developed an original system of differentiated volumes for its breakwaters.
Unlike conventional breakwaters made of reinforced concrete anchored to the seabed, the Martini Marinas series does not run the risk of being put out of action by excessively deep
waters or by silting. Each model comes in a choice of two versions, for marinas located on the sea and on the lakes, and can be completed with dunnage and connecting gangways.
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Floating pier BW400 (BW300), is a wave attenuator and high-stability mooring quay able to protect partially sheltered docks. This pier consists of a system of modular elements interconnected by semi-elastic joints. The modules are floating structures made of reinforced concrete conglomerates. Inside, a core of polystyrene foam make them light and unsinkable. Concrete is obtained from a mixture of pozzolanic or blast furnace cements and is therefore suitable to the marine environment. Selected aggregates assure a high-quality concrete.
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Standard Breakwater Units
Specification:
Designed and manufactured in Ireland by Banagher Concrete Ltd. to an ISO 9001 accredited quality system
Live loading: 4.0k/m2
Design Code: BS6349
(British Standard Code of Practice for Maritime Structures)
Freeboard: Approx. 500mm
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Commercial floating structures to meet the needs of berthing larger vessels and provide wave attenuation for inshore locations.
Walcon Marine Ltd is proud to represent in the UK, SF Marina from Gothenburg, Sweden who specialise in the production of top quality all concrete floating breakwater structures.
Considerable wave research has been carried out over the last 20 years. on the use of floating structures as wavebreaks in sheltered locations such as estuaries and lagoons. The wake of passing vessels and short period waves can still create unpleasant conditions in yacht harbours. Recent experience has shown that floating pontoon breakwaters are effective in attenuating waves in marginal sites.
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Floating breakwaters can only be used economically in fairly sheltered locations where effective fetch is less than 6 km (i.e. wave period generally of less than 4 seconds).
The breakwaters reduce the wave height and strength by directly deflecting some of the energy and dissipating smaller amounts by friction and turbulence. Significant amounts of energy are dissipated by the movement of the floating breakwater due to its size and flexible anchoring.
The main technical parameters i.e. width, height, weight and moment of inertia, are selected for maximum attenuation capacity. The connection between the pontoon units is semi-flexible with sufficient rigidity to enable the breakwater to work as a continuous structure - a significant advantage in wave attenuation capability.
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Acting as a floating “breakwater”, Unifloat® wave attenuators are designed and engineered to significantly reduce wave action entering a marina basin. These attenuators are an ideal solution for many harbor applications with some important benefits such as low environmental impact and no water depth limitations. There are four primary variables that affect attenuator performance. They are the mass, the width, the depth and the configuration of the attenuator. Each of these variables must be adjusted to meet the specific design wave criteria for every site.
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Concrete has long been recognized throughout the world as the preferred material for marina docks and wave attenuators. It provides mass for stability, rigidity for strength and durability, and is a long term solution in fresh and salt water marine settings. Where a floating wave attentuator is called for, concrete offers a usable economic option.
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Customized to your requirements
Debris booms are normally custom designed and built to fulfill the customer's requirements. The components are connected together with cable, allowing long spans. This also allows for easy disassembly in any maintenance or debris clean up.
The debris boom consists of Topper Floats with thru rods to hold the unit together. Concrete is added to the section for weight and stability. The amount of concrete can be varied to change the free board of the boom. They are designed with low maintenance and long life in mind. The design life is twenty to twenty-five years, in most cases.
Pricing varies depending on length and environmental requirements.
Access for trash removal can also be provided using the Topper Dock System. The dock can be custom fit around intake screens to give a safe area for your crew.
Safety Dam Barriers
We also build safety barriers used to prevent boaters from entering hazardous areas around the dam and intake structures. There are several designs that allow for easy maintenance and flexibility of operation. Our Floating Sign Buoys can be incorporated in these areas.
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BREAKWATER 180
Heavy concrete pontoon with side walls for improved wave attenuation. Filled with cellular plastic and with chain pits for anchoring.
Embedded pipes for electricity, water and lighting connections. Robust fendering (90 mm x 145 mm) made of pressure-treated wood. Connected together using elastic rubber couplings.
· Extra depth provides wave attenuation.
· Maintenance-free.
· Unsinkable due to cellular plastic filling.
· Long service life.
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