Spencer Group bridges a gap with cantilever walkway on cantilever bridge

26/04/2022 | CHRIS AMES

Bridges specialist Spencer Group is to cantilever a temporary walkway off the side of what is itself a historic cantilever bridge while it carries out major deck replacement works.

Spencer Group is carrying out the design, construction, installation and maintenance of the walkway on the Grade II listed A828 Connel Bridge, near Oban in Scotland.

It said the walkway is expected to be completed in four months, and may be retained, depending on a feasibility study and full public consultation.

It will be cantilevered off the east side of the bridge and will allow for pedestrian and cyclist access during the works to replace the entire deck, which will take place over the next two years.

Luke Fisher, sector lead for bridges and structures at Spencer Group, said: ‘Our designers proposed a traditional steel walkway design that was in-keeping with the heritage of the bridge, clamping to the existing structure where possible, to minimise invasive construction works to the bridge interface points.'

The Connel Bridge was the second largest cantilever bridge in Europe when it was built by Sir William Arrol in 1903. It links the villages of Connel and North Connel, the site of Oban airport. Originally a railway bridge, it was used for both rail and road traffic from 1914, until the railway closed in 1966.

Spencer Group, which is also self-delivering integrated street lighting, said the new steel walkway design will be in-keeping with the heritage of the bridge.

Mr Fisher said that a key element of the project was to minimise the impact on local residents and traffic, both on Connel Bridge and on the A85 below.

‘The original design intent was to install support brackets over the side of the masonry viaducts that would require rope access for installation, meaning traffic management would have needed to be in place on the A85,' he said.

‘We’ve come up with an alternative design solution that mitigates this, with brackets that can be installed from the confines of the bridge parapets. In addition, we’ve developed an installation methodology that allows our teams to install the new walkway progressively from the leading edge, almost eliminating the requirement for traffic management on the bridge during the works.’

Spencer Group is carrying out the project for BEAR Scotland, which operates the trunk road network in the region on behalf of Transport Scotland.

Eddie Ross, BEAR Scotland’s North West representative, said: ‘We appreciate the historical importance of the A828 Connel Bridge and the vital transport link it provides to local communities.

‘This project will allow teams to install a temporary footway on the east side of Connel Bridge, in advance of the deck replacement works which are scheduled to take place next year. The temporary walkway will maintain a route across the bridge whilst the bridge deck is replaced, as we will need to close the existing footpath and carriageway.’

Highways InProfile

latest magazine issue
Highways jobs

Senior Civil Engineer - Major Projects x 4

£45,894.00 - £54,952.00
We are looking for experienced engineers to help us progress a number of key projects and programmes Glasgow, Glasgow City
Recruiter: Transport Scotland

Technician - Maintenance

£31001.0000 - £36471.0000 per annum
Essex Highways is responsible for managing and maintaining one of the largest highway networks in the country
Recruiter: Essex County Council

Highways Contract Engineer

£46,731 - £49,764
The team helps provide a safe road network that operates efficiently and effectively.  Northamptonshire
Recruiter: North Northamptonshire Council

Principal Transport Planner

£46,731 - £49,764 (pro-rata)
We are looking for an experienced professional to join us on a six-month temporary contact as a Principal Transport Planner. Kettering, Northamptonshire
Recruiter: North Northamptonshire Council

Highways Maintenance Operative

£Competitive
We have a fantastic opportunity for a Permanent Highways Maintenance Operative Broughton, Brigg
Recruiter: Amey

Head of Highways Contracts & Network

£81,803 progressing to £90,664 per annum
The team includes approximately 60 directly employed HCC people Hertfordshire
Recruiter: Hertfordshire County Council

Principal Construction Manager

£Competitive
We are excited to offer a fantastic opportunity for a Permanent Principal Construction Manager Yorkshire and the Humber
Recruiter: Amey

Quality Technician

£Competitive
We are excited to offer a fantastic opportunity for a Permanent Quality Technician Yorkshire and the Humber
Recruiter: Amey

Senior Highway Engineer (Development Management)

£42679.0000 - £50211.0000 per annum
Senior Highway Engineer (Development Management)Permanent, Full Time£43,960 to £51,718 per annum*Location
Recruiter: Essex County Council

Project Manager (Major Projects)

£44,711 - £47,754
Are you an experienced project professional or engineer with looking to take the next step in your career? Halifax, West Yorkshire
Recruiter: Calderdale Metropolitan Borough Council

Senior Civil Engineer - Roads

£45,894 - £54,952
Are you an experienced engineer looking to support the Scottish Government’s national objectives. Scotland
Recruiter: Transport Scotland

Project Team Manager

£55,147 to £60,676 per annum
We are pleased to be able to offer an opportunity for a role as Design Team Manager Norwich, Norfolk
Recruiter: Norfolk County Council

Clerk of Works

GRADE 08 (£37,938 - £41,511)
Warrington is one of the most successful towns in the country Warrington, Cheshire
Recruiter: Warrington Borough Council

Assistant Projects Engineer

GRADE 06 (£29,093 - £32,654),GRADE 07 (£33,366 - £37,035), GRADE 08 (£37,938 - £41,511)
Warrington is one of the most successful towns in the country Warrington, Cheshire
Recruiter: Warrington Borough Council

Principal Engineer - Traffic Management

£45,718 - £48,710 per annum
At Bath & North East Somerset Council we have one overriding purpose – to improve people’s lives. Bath, Somerset
Recruiter: Bath & North East Somerset Council

Vehicle Technician - Improver

£28,624 - £30,060
Transport Services is responsible for all aspects of transport and related services Huddersfield, West Yorkshire
Recruiter: Kirklees Metropolitan Council

Programme Delivery Office Administrator

Grade 9 £31,344 - £33,253 per annum
At Derbyshire, we have been on a journey to transform the way we deliver highway services to make them fit for the future Derbyshire
Recruiter: Derbyshire County Council

Support Officer - Highways Asset Management Systems

£31,586 - £34,314
We are a forward-thinking organisation dedicated to maintaining and improving our highway infrastructure. Lincolnshire
Recruiter: Lincolnshire County Council

Principal Transport Planner (Strategy)

£46,731-£49,764
We are looking for an experienced professional to join North Northamptonshire Council as a Principal Transport Planner (Strategy). Sheerness House, 41 Meadow Road, Kettering moving to Haylock House, Kettering Parkway, Kettering NN15 6EY, United Kingdom
Recruiter: North Northamptonshire Council

Electrical Engineer

Grade 9 £34,314 to £37,938 - Grade 10 £37,035 to £40,476 - Grade 11 £39,513 to £43,693 - Grade 12 £42,708 to £46,731 p.a.
The Construction Consultancy Services (CCS) team provide client-side construction consultancy services across a range of professional disciplines to d Durham
Recruiter: Durham County Council
SUBSCRIBE NOW

Latest Video

Subscribe to Highways today to ensure you keep your finger on the pulse of everything happening in the UK road network throughout the year.

SUBSCRIBE NOW