Menai Bridge Inspection

The Scope

Vertical Access Ltd were appointed by Mott MacDonald as Subconsultant to carry out the Principal Bridge Inspection (PBI) of the historic Menai Suspension Bridge in North Wales. Designed by Thomas Telford and completed in 1826, this Grade I listed structure spans the Menai Strait, connecting the Isle of Anglesey to the mainland. The inspection covered all major structural elements, including the masonry towers, suspension chains, trusses, hangers, and deck soffit.

The Challenge

As one of the UK’s most iconic bridges, Menai presented several challenges. The inspection had to be conducted over tidal waters and live carriageways, with limited access options due to its age and listed status. The project required close visual inspection to strict standards (BD 63/93), all while ensuring minimal disruption to traffic and preservation of the bridge’s heritage features.‍

The Vertical Approach: Safety, Quality, Innovation & Agility

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Safety

Working under a live environment demanded precise coordination and strict safety control. Our IRATA-trained operatives maintained full compliance with national bridge inspection standards while operating at height and over water.

Quality

Every element was accessed and inspected within touching distance, ensuring a complete and accurate structural record for Mott MacDonald. Findings were documented to the standards of Form BE 11/94 (BA 63/94) for a high-quality client deliverable.

Innovation

To overcome access restrictions, the team used a combination of industrial rope access and Mobile Elevated Work Platforms (MEWPs) during nighttime closures, utilised a combination of industrial rope access and Mobile Elevated Work Platforms (MEWPs) during nighttime closures, thereby eliminating the need for costly and time-consuming scaffolding.

Agility

Vertical Access worked closely with the main contractor and the Menai Bridge management team, adapting to changing conditions and ensuring that night operations were completed smoothly within tight time constraints.

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Outcome

The project was completed within one week, safely and efficiently. All inspection objectives were met without disruption to daily bridge operations or public access. The client received a comprehensive, well-documented report that will assist future refurbishment planning while ensuring the continued safety and preservation of this historic landmark.

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