Client: Carillion
Location: Wimborne, Dorset
Project: Strengthening of Canford Bridge
Background
Canford Road Bridge in Wimborne is an historical structure that required strengthening works to bring it up to date and prevent it being closed from traffic. Closure of the bridge would have caused major problems for getting in and out of the historic market town of Wimborne Minster.
The Challenge
Being an approved scaffold supplier for Carillion, the main contractor asked Denholm Industrial Services to design a scheme that would allow pedestrians to walk from one side of the river to the other while the bridge was closed, following the bridge profile and enabling works to be undertaken unhindered. The scaffold design had to take a public loading of 5kN per metre square, was to be constructed in a river and over a flood plan and was to remain in place for 40 weeks. The scaffold had to be strong enough to resist a 1 in 100 year flood whilst people would still be walking across it!
Our Solution
Denholm Industrial Services designed a scaffold that incorporated the very strong 750mm deep libra beam and resin, which was bolted to the stonework. Steel deflecting cladding was incorporated at the scour point to two metres out of the water to deflect any passing trees that may have been swept down river as result of a flood. The scaffold measured over 140 metres long and had a finished surface that was just as good, if not better, than the footway that had existed across the bridge for many years.
