Challenging Bridge Crossed with Collett’s Innovative Transport Solution
Appointed by Fracht UK, Collett were tasked with providing a transport solution to deliver the 80t cargo the 230 miles from Goole to Harting Rig Wind Farm in South Lanarkshire.
A relatively straightforward journey, Collett left their Goole Heavy Lift facility and slowly made their way to the rural County of South Lanarkshire. However, in their planning they had identified a challenge to this straightforward project, namely Glassford Bridge, only 3 miles from Harting Rig Wind Farm!
Weight restrictions were in place on the bridge structure, with limitations to the vehicles and cargoes crossing the bridge. The loaded trailer and truck combination would exceed the structure’s maximum permitted weights; therefore a new approach would be required.
Alongside the weight limitations, Collett were also required to observe a maximum speed of 10mph and ensure that no other traffic or pedestrians would be present on the bridge during the transport operation. In addition, all vehicles must follow a 3m strip of the bridge, with a series of cat’s eye markers in place to ensure each vehicle maintained a set alignment throughout.
With all this identified, Collett planned innovative transport arrangements to overcome these obstacles.
On arrival at Glassford Bridge the planned process began, first by uncoupling the loaded trailer from the 8×4 MAN TGX tractor unit. Once disconnected, two 40m wire cables were attached, connecting the trailer and primary ballast truck. A secondary 8×4 ballast unit was then connected at the rear of the trailer, again using 40m wire cables.
The extended combination was then ready to go. Having implemented Temporary Traffic Restriction Orders, the lights on the bridge were turned to red and Collett were able to proceed. With all other traffic restricted, the secondary ballast tractor reversed, and the primary drove forward. This tensioned the cable, removing any slack, then both vehicles began the slow drive forward.
Controlling the cable tensioning throughout, the primary tractor unit cleared the structure, followed by the trailer, transformer and Steersman in tow. With the ability to control the trailer steering and breaking, Collett’s Steersman ensured that the trailer and cargo remained within the necessary alignment whilst traversing the structure. Once clear of the bridge, and with the trailer brake applied, the secondary ballast unit took up the cable stack and crossed Glassford Bridge, operation complete!
With the wire cables removed and the primary tractor unit re-coupled, the 80t transformer completed the remaining 3 miles of the journey to Harting Rig Wind Farm. On arrival, the cargo was met by Collett’s Heavy Lift Team for jacking & skidding to final position.
Source Collett and Sons
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