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The presentation describes an overview of the construction of the main bridge crossing including the tower foundations, tower construction, cable stayed deck steelwork fabrication, post-tensioned deck slab precasting and composite segment erection, stay installation, north and south approach viaduct launching and deck completion including surfacing and wind shielding. A general overview of the approach motorway network to the north and south of the bridge will also be given.
Speaker: John Redpath
Refreshments will be served from 18:00 for a meeting start of 18:30.
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Organised by ICE Lancashire Branch joint with IStructE.
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John Redpath has worked in the UK construction industry for 37 years in the design, maintenance and strengthening of bridges. These have been principally in the UK with occasional involvement with bridge designs in the Middle East. John has for short periods also worked in the rail and nuclear sectors.
As a graduate engineer, John started his bridge design career with Central Region, a local authority based in Stirling. After gaining ICE Membership in 1986, he has worked within a number of UK based international consulting practices and for the last 16 years, has been with Jacobs in Glasgow. He has been involved in the design, strengthening and repair of a number of Scotland's nationally strategic bridges such as the design of Dornoch Bridge, the M8 St James Interchange, the strengthening and repair of Kingston Bridge in Glasgow, the M8 White Cart Viaduct, a number of bridges on the M74 Completion project in Glasgow and the design and construction of the ship collision protection structures at Tay Road Bridge.
Since 2012 John has been a senior engineer in the Employer's Delivery Team (EDT) responsible for the cable stayed bridge towers and deck construction on the new Queensferry Crossing – the subject of this evening's talk.
As a Senior Consultant in Jacobs' Highways and Bridges section, John was a member of the Jacobs-Arup Joint Venture forming part of Transport Scotland's Employer's Delivery Team for the new Queensferry Crossing, a three tower cable stayed bridge being constructed alongside the renowned Forth Rail and Road Bridges.
His role as part of the Employer's site based team was to ensure that construction progressed in strict compliance with the contract and entailed the detailed review of technical processes and methods for both temporary and permanent structure along with close surveillance of the construction. Initially responsible for the north and south towers, he moved on to the deck construction which for 18 months saw the cable stayed bridge deck balanced cantilevers extending from the towers.