Built in the 1960s, the A465 Heads of the Valleys Road joins together the northern heads of the South Wales Valleys. In 2014, work began to convert the road into a dual carriageway requiring the construction of several new road bridges, footbridges and retaining walls.

Inertia Consulting Ltd was appointed to design and supervise the temporary works for the Spinningfields Footbridge, a 52m curved inverse arch catenary footbridge spanning the River Irwell in Manchester in a tight urban location.

Northumberland Park is a mainline railway station on the Lee Valley line, which forms part of the West Anglia Main Line. It serves the ward of Northumberland Park in Tottenham, providing a direct link into London Liverpool Street Station.

The project was a success, with a key benefit being the use of weathering steel for the main structure, as it avoids the need for maintenance – and associated disruption – during the bridge’s designed ‘in service’ life.

In 2008, Inertia Consulting identified that the 70m Wilford Suspension Bridge in Nottingham had deteriorated significantly from previous inspections and its load-bearing capacity had become substandard. We were therefore appointed by Severn Trent Water plc to carry out a principal inspection, dimensional survey, capacity assessment, refurbishment scheme design – including temporary works – and construction supervision for the bridge.

Salthouse Footbridge is located just north of Petts Wood Station and provides a public footpath over the South Eastern Main Line. The footbridge is part of a local route between green spaces and provides access to a school. Inertia Consulting Ltd were chosen to design a new bridge to modern standards to replace the original footbridge which was in poor …

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