- DEMOLITION TEMPORARY WORKS DESIGN
- BRIDGE STRUCTURE
- OXY/PROPANE CUTTING TECHNIQUES
As part of the project to upgrade the A465 Heads of the Valley road between Brynmawr and Gilwern in South Wales, the existing steel Lion Hotel Footbridge was deemed surplus to requirements and in need of demolition. Costain appointed trusted partner Walters to design and undertake the demolition works to a predetermined sequence during a 9hr night time road closure of the A465
Walters engaged with a trusted specialist demolition temporary works design partner to study historical records of the bridge construction and jointly develop a safe demolition sequence. Once finalised, the sequence was submitted to Costain for review and independent design checking.
During the overnight road possession, Walters highly skilled team undertook the removal of the bridge structure exactly in accordance with the pre-determined sequence, utilising oxy-propane gas cutting techniques to sequentially remove sections of the structure and lift them down to ground level using a 70T mobile crane.
Removed sections of the footbridge were processed with a company owned 20t demolition spec excavator and specialist hydraulic demolition attachments and removed from site to a licensed recycling facility.
The works were completed safely and within the allocated road closure period allowing the road to re-open for morning rush hour traffic.