TTS to Supply Linkspan for Rothesay
01 Apr 2007
TTS has won a contract to design, supply and install a linkspan and pedestrian bridge as part of the Rothesay Pier Ferry Berth Improvement Project in the UK.
The contract comes in anticipation of the introduction of the ferry Argyle, one of a series of new vessels in operation on CalMac’s most frequented route between Rothesay and Wemyss Bay.
The new vessels have been designed with bow and stern ramps for use with parallel berth linkspans at both ends of the route. The linkspan will enter service this summer.
TTS’ proposal for the new linkspan comprises a ramp hinged at the bank seat, supported by a portal structure at the dolphins. The structure will be operated by the use of four hydraulic cylinders designed to move it vertically with live loads.
The linkspan will be 30m long, with a width of 4m, and will be equipped with fenders with an energy absorbing capacity of 34 ton metres, both at the front and at the bank seat.
The front end of the linkspan will be sloped to accommodate a variety of vessel ramp geometries, such as those with the Coruisk and Bute, two vessels currently in operation on the route. The linkspan can also be used by vessels without ramps as it will be equipped with a hinged flap. The flap is also operated by the hydraulic cylinders and will follow the vessel’s movements.
TTS will also deliver a 14m long lifting bridge, allowing pedestrian access over the northern end of the pier, which separates the inner and outer harbours. The bridge is to hinge, with a counterbalance at the hinged end. The bridge will be operated using two hydraulic cylinders located at each side and the ramp will rest on a support in its horizontal position and is designed to be opened to a 75(DEGREE) angle to allow access for sea traffic.






