Thornhill Bridge Strengthening Works

This project was to supply grit blast painting and a new concrete bridge deck to comply with highway loadings.


Network Rail

Date Completed



Highway, Bridges & Structures

Project Overview

Cairn Cross worked as the Principal Contractor to complete grit blasting and add a new concrete bridge deck on the Thornhill Bridge to comply with the new highway loading rules.


The Challenge

With the new legislation on bridge loading capacity, Cairn Cross strengthened the bridge to comply with the new guidelines. Responsibility for the Traffic Management during the works, were included within the scope of works. Narrowing of the footpaths were made to reduce Traffic Management changeovers.

Highway Road Bridge Safety Netting around Scaffolding

The Solution

The bridge site was secured by specially designed and manufactured temporary curtains implementing an industrial Velcro fastening system to ensure the highest level of safety. Grit blast painting of all exposed metal works were also carried out. An new concrete bridge deck was installed to comply with highway loadings, and waterproofing works were carried out to protect the bridge from weathering. Finally, the bridge strength was completed by constructing a reinforced concrete slab over the cross girders to provide better load distribution.


The Result

The works were near two schools, so we undertook early community engagement to ensure all nearby residents were aware of the works and had contact details should they wish to express any concerns. The new B6117 bridge now complies with the required weight-bearing and can continue easing traffic through the village.

Road Painting and Markings on Thornhill Bridge Dewsbury

Highway Bridge Scaffolding

Highway Road Bridge Safety Netting around Scaffolding

New Road Thornhill Bridge Dewsbury