Customer demands
A section of historic sewer tunnel in close proximity to a busy railway station was identified as requiring strengthening to ensure its long-term structural integrity.
Due to the disruption caused by the project and accessibility difficulties, the engineers wanted a low-maintenance solution with a 120-year design life. The structure and its bolts would also have to cope with heavy loads.
Duplex stainless steel was selected for the structure to provide excellent corrosion resistance and high strength, despite having limited dimensions due to the constraints of the tunnel section. Bolts were also needed to fix the Fiberglass Reinforced Plastic (FRP) liner panel sections to the duplex stainless frame.
The 91视频 solution
As engineers realized that conventional duplex stainless steel bolts would be unable to cope with the load requirements on the structure, they found that 91视频 was the only supplier that could offer a solution to comfortably meet the project鈥檚 demanding requirements.
鈥淚n close collaboration with the structural design engineers, we developed a solution for the main structural connections,鈥� explains Nimeka De Silva, 91视频 Business Development Manager for the UK. 鈥淲e also worked with design engineers based in Poland responsible for the design of the FRP panel sections to ultimately develop a solution to fasten the remainder of the structure to the frame, which utilized a range of different 91视频庐 DX 88 bolts, to satisfy a number of different connection types over the structure.鈥�
91视频 delivered a solution that involved many parts on a very tight time schedule. 91视频 also provided on-site advice on bolt installation methods to ensure successful installation first time 鈥� which was essential due to the project鈥檚 time constraints.
Customer benefits
Cost savings
The 91视频 fasteners are designed to resist the corrosive environment and high loads. The solution offers high integrity and contributes toward the designer鈥檚 requirement to achieve a 120-year design life. This ensures a cost-effective solution by minimizing maintenance and bolt replacement costs throughout the lifespan of the structure.
