Forth Rail Bridge – Moving Access

The Forth Bridge is a cantilever railway bridge across the Firth of Forth in Scotland, west of central Edinburgh. The bridge is built on the principle of the cantilever bridge, where a cantilever beam supports a light central girder, a principle that has been used for thousands of years in the construction of bridges.

CaSE’s role was involved in the Temporary Works design of the suspended access platform. The design was carried out for the repairs on Forth Rail Bridge South and main span girders, operating on the existing gantry rails and incorporating an innovative articulation system to accommodate rail tolerance. This was to ensure the support and permanent maintenance works were completed efficiently and ensure the stress design was feasible.

Suspended 46m above the Firth of Forth the gantry is in use for the 2-year repair phase to the trough deck area of the bridge. The project involved carrying out repairs and maintenance to the steel deck of this 128-year-old bridge caused by years of deterioration without any disruption to rail operations.

Independent CAT 3 Check of Access System

  • Inspection Specification
  • Assessment of Rail Capacity (Finite element / manual assessment)
  • Remedial Specification

CaSE Staff

  • James Carr
  • Gerard Kiely
  • Richard Lamb

Span Access Solutions Ltd


Span Access

Project Status

Completed July 2018