Articles about Pedestrian

A new 16.5m span, sustainable FRP footbridge with a design life of 120 years incorporating a bespoke balustrade of marine-grade polished steel and infill panels with a protective rust patina.

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Dates now available for CPD events in November, December 2023 and into early 2024
Email steven@lifespanstructures.com to arrange a suitable date & time

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Spectacular footage from drone of newly installed Lifespan FRP bridge decks

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Colinton Dell is a steep-sided gorge and wildlife refuge on the Water of Leith, just north of the old village of Colinton on the outskirts of Edinburgh.
Today walkways and a cycle path take visitors to the ruined Redhall Mill and past Kate's Mill, where paper for the Bank of Scotland's first banknotes is said to have been made.
As a result of a Lifespan e news letter campaign in the autumn of last year we received an enquiry from the Mott MacDonald team in Edinburgh.

After several on line meetings and an on site visit we developed a solution for the Client Edinburgh City Council and introduced CRL Scotland to the project team as a specialist contractor that was capable of delivering the project.

Following a tender process in early 2023 CRL Scotland were awarded the project valued at circa £250,000 as reported in March of this year

The objective of the project was to provide a replacement deck for the existing Colinton Dell Rustic Footbridge with a design life of 120 years. The existing timber deck on the footbridge was in very poor condition and a new Lifespan Structures (FRP) deck was designed, manufactured & installed by CRL Scotland as a replacement so that the bridge can be re-opened in July of this year

Due to the very challenging location of the site the CRL team came up with a carefully thought out plan as to how they would remove the old bridge and be able to safely install the new Lifespan FRP deck sections.

Additional challenges for the team included a high pressure gas main adjacent to the existing bridge, the steepness of the Dell either side of the bridge location and that everything had to come through the famous Colinton Dell Tunnel.

The new Lifespan Structures FRP deck was designed in house to conform with a specification provided by Mott MacDonald. The new deck of approximately 28m span was supplied in 5 sections of 5.7m long x 2.5m wide and 65mm thick that are mechanically fixed onto the existing longitudinal steel beams, that are in good condition. A new 1.5m high galvanised steel parapet was also be installed.

Watch the video here of the completed bridge
https://youtu.be/7F7L-bdyUPE

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Due to economic & climate considerations Clients demand ever more sustainable options when trying to repair or extend the life of their bridges rather than its complete replacement. Bridges often require repairs and eventually wholescale replacement of key structural elements during its service life & these can be very expensive and disruptive to the users of the bridge. Perhaps the most disruptive and costly is that of the deck replacement which could be steel, concrete or a timber deck for pedestrians, cyclists and vehicle trafficking.

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Almost 7 years ago one of our Local Authority Clients issued a tender for a project that required a new simply supported 8m single span bridge of 1m width with a standard anti climb parapet. A variety of typical bridge construction types were permitted including steel, timber and an alternative using Lifespan resin infused FRP composites. With input from the Client additional considerations were made as to the likely cost and regularity of maintenance works for each of the possible bridge types in order to ascertain a whole life cost for each of the options.

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The construction industry is committed to reducing the environmental impact of its activities. The Construction 2025 joint strategy from the UK Government and industry, working in partnership, sets a vision, which includes 50% lower emissions, 33% lower costs and 50% faster delivery. Using FRP composites in place of steel and concrete for bridge construction will deliver this vision now. The carbon and energy embodiment is significantly reduced at the construction stage and still further during the 100-year minimum service life.

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2 Span FRP Footbridge Installed on PROW

This Public Rights of Way (PROW), 2 span bridge was installed in December 2018. The lightweight nature allowed easy installation in this remote location during the winter months and moulded deck technology means long term maintenance will be reduced to a minimum.  The total length of the bridge was 14m and 0.905m wide between the handrails.  The handrails were attached to the outside edge of the bridge to minimise the overall width of the structure to suit site constraints.  The project demonstrates that FRP bridges can be a cost effective, durable alternative to traditional construction methods for small remote structures.

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FRP Footbridge at Sedlescombe

600kg FRP bridge deck replaces a 2-3000kg timber bridge, delivered and put in place in just a few hours. The installation of our first generation of lightweight footbridge structures is over 3 years ago now.

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