Access chambers provide rapid results for Queensferry Crossing
13 September 2017
Leading European manufacturer of access chambers, Cubis Systems, has provided inspection chamber units to the Queensferry Crossing bridge, which opened in Scotland last week. The project, which is now the primary route across the Firth of Forth, required access chambers that could meet the time, budget and safety constraints.
The Queensferry Crossing bridge is the biggest infrastructure project in Scotland for a generation and is the longest three-tower, cable-stayed bridge in the world. The project will provide primary route across the Firth of Forth as well as upgrading the connecting roads on either side of the bridge.
The project has resulted in a 22 kilometre ‘managed motorway’ that will regulate the traffic travelling across the Forth between Fife and Lothian. The scheme has involved the installation of overhead gantries providing lane control, variable mandatory speed control and bus lane control.
“The project specification outlined that all gantries required an access point, which acts as an inspection chamber,” Ian Waugh, area manager - Scotland at Cubis Systems said. “These chambers help with the upkeep, maintenance and continued monitoring of the road network.
“Cubis’ RapidSTACK chambers were selected because they could overcome a number of the challenges the project threw up. Traditional pre-cast concrete chambers would have required extensive, costly and time-consuming modifications, while poured in-situ chambers would require additional machinery and specialist builders.”
RapidSTACK chambers can be delivered in flat-pack component parts that allow for enhanced manoeuvrability and do not require heavy duty machinery. The chamber systems are highways approved and are significantly faster to install than traditional alternatives.
The Queensferry Crossing managed motorways scheme combines 50 regularly spaced overhead gantry locations, which aim to reduce journey times as well as improve the safety of travellers. The roadway will use variable mandatory speed limits as well as controlling dedicated bus lanes in the motorway hard shoulders, both of which are being used for the first time in Scotland.
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