SF 500

In Nynashamn SF500 protects the entire harbor from northerly winds.

Solid custom gangway. Note the stainless steel cleats.

SF500 - five awesome meters wide!

SF 500 - security and comfort.

SF500 - on the way to Nynäshamn. Note the wings.

SF500 - straight and neat. Angles where they are needed.

SF500 - a stable installation.

SF500 - here also as a recreational area or promenade street.

SF500 - safe, secure and easy mooring.

SF500 - view from the jetty.


The SF500 Series is a 5-meter wide super strong breakwater. The SF500 Series is our second most recent product and it has evolved over the past 15 years. The primary market for our SF500 series is the USA’s East Coast where our installations are regularly exposed to the brutal hurricanes that plague the coast during the autumn season. That our SF500 series survives this depends on our unique coupling system that absorbs and distributes loads when the loads are increasing tremendously during severe storms. Simply put, one can say that when a SF500 breakwater is under duress, the rubber cylinders in the connectors are what handles the stress, and not the wires, so the concrete around the connectors is subjected mainly to compressive forces, and not tension. This makes our breakwater unique and our SF500 series  is the foremost floating breakwater made today.

A breakwater is designed for protecting a harbor. It may be subjected to excessive forces when hurricanes and storms strike. SF500 is a 5 meter wide concrete breakwater, often found as the outer pier protection for various port facilities.

Over the years we have worked with our SF500 series, of which we currently have a few dozen outsourced around the world, so we have tailored solutions for the most diverse needs. We can now manufacture them at any angles whatsoever, and we can equip the pontoons with virtually any components because we basically use the same standardized technical solutions that are thoroughly tested.

Our whole concept of floating breakwaters is built on three premises:

  1. Strong reinforcement around the mooring-rings. Our mooring-rings are reinforced in such a manner that the entire breakwater can be lifted by a single ring.
  2. Our coupling system consisting of access wells with heavy steel plates, stainless steel cutouts, coupling wires packed in anti-corrosive grease and heavy rubber cylinders. The coupling system is also so versatile that we can make use of  center couplings, to eliminate torsional loads on longer piers or sections used to build specific angle solutions.
  3. Our mooring technique which is based on an anchoring system using heavy chains and concrete anchors. The chain is coupled to the pontoon mooring-rings with shackles and a “bridle ring” as shown below. It is clear from the diagram below, when forces on the chain increase as the coupling gets pulled downwards under load, the total force at the  “bridle ring”  causes the pontoons to be pulled together, while still kept safely apart by the rubber cylinders. The more the wind blows, the more the pontoons get pulled together.Dobbel sikring

Each breakwater is unique and therefore each pontoon is custom built only after the client has approved the drawing, called a “shop drawing” , which means that our customers  get their pontoons built according to their specifications.

SF400 Series, like all of our breakwaters, is doubly reinforced with the market’s thickest concrete surfacing layer, which guarantees a strong pontoon with a very long lifetime. The amount of reinforced concrete in a breakwater is easy to compare with others, by simply checking the weight.

SF MARINA SYSTEM AB
Propellergangen 4 417 64 GOTHENBURG SWEDEN | Tel: +46(0)31-779 07 65 | Fax: +46(0)31-779 07 35
info@sfmarina.com