Scottish Trunk Road Unit - South East Unit - Forth Road Bridge – Grillage Steelwork Repair, Blasting

Tender description

The Forth Road Bridge VRS (also known as grillages/parapets) consists of over 16km of barriers and parapets on the viaducts and suspended spans. The suspended span grillages conform to the geometrical and strength requirements of the containment level appropriate for the bridge carriageways for speeds up to 50mph. VRS investigations found section loss, cracked welds, corrosion, and paint deterioration of steelwork. Impact damage was noted in some locations. All defects found have a detrimental impact to the VRS capacity to resist impacting loading. The entire length of VRS has deteriorated with significant paint and structural defects identified throughout the length of the VRS. BEAR Scotland are looking to appoint a temporary works contractor to design, supply, install and move (as required) a temporary access platform that can be used for the maintenance of the grillage VRS. The works involve the installation of bespoke temporary access system working beneath the Forth Road Bridge to carry out blasting, steelwork repairs and painting works. The refurbishment is required on the 2no. lane 1 outer grillages and the central grillage for the full length of the suspended spans. Works are due to commence in August 2022 for a total of a 3 year period, though it is envisaged the contractor shall only be engaged during mobilisation from one section of the bridge to the other. The value of the works is estimated to be around 350,000.00 GBP