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Broken jacks delay A9 bridge installation

Contractor Morgan Sindall was forced to delay installation of an 84m long pedestrian and cycle bridge in over the A9 in Inverness, Scotland last weekend after the jacks failed.

Morgan Sindall was in the process of installing the 290t “Golden Bridge” from the A9 when the jacks used to raise the bridge buckled under the weight of the bridge. This then caused the wheels underneath the jacks to sink into the ground as weight was no longer evenly distributed.

Individual axles were lifted from the ground using jacks. Steel plates were then inserted under the wheels allowing them to be driven out of the ground. Ramps were then laid over the ground.

The bridge was secured to the jacks while being raised, so there was little risk to workers on site, according to a Morgan Sindall spokesman.

The A9 in Inverness was closed between the Raigmore Interchange and Sir Walter Scott Drive whilst the bridge was being installed on 6 April. It closed again on 7 April for a second successful attempt.

The bridge was designed by consultant Fairhurst and built as part of Morgan Sindall’s £12M infrastructure contract on phase one of the Inverness Campus development.

Golden Bridge: Initial attempts to raise the bridge failed after the axles buckles on many of the jacks.

Readers' comments (2)

  • Is there confusion over the phrase "The Bridge was designed by 7N Architects". I understood that Fairhurst were the designers and the architect specified the gold cladding.

    perhaps someone can clarify the areas of design.

    Ken Cantlay

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  • Thank you for your comment. The designer was in fact Fairhurst, the story has now been amended to reflect this.

  • Thank you for your reply.

    It is however somewhat galling to find that our own magazine editorial staff did not have an inbuilt awareness of such an error so that it might not only have been corrected but perhaps even refuted.

    Ken Cantlay

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