The benefits of an advanced siphonic drainage solution
The RDS Anglesea Stand is a state-of-the-art upgrade for Leinster Rugby in Dublin, designed to accommodate 6,775 spectators. During the design development stage, we were engaged by Grimshaw Architects, who had progressed the project up to RIBA Stage 3. They encountered significant challenges with the gravity-based drainage system initially proposed for the stand. Specifically, the design required a high volume of downpipes, which presented both spatial and architectural conflicts.
The exposed structural columns of the stand provided minimal opportunities for concealing large-diameter rainwater pipes, while the limited space within the structure made integrating a conventional drainage system unfeasible. Grimshaw Architects sought our expertise in re-engineering the drainage approach to meet these constraints while preserving the architectural integrity of the stand.
Our Engineering Solution
We proposed a siphonic drainage system, which utilises differential pressure to efficiently convey rainwater while minimising pipe diameters and the number of roof outlets. This alternative allowed us to address the constraints posed by the existing structural and aesthetic parameters.
To ensure a fully integrated solution, we conducted technical workshops with Grimshaw Architects, focusing on critical design considerations:
- System Efficiency: By leveraging the self-cleansing flow characteristics of siphonic systems, we significantly reduced the number of outlets required on the roof, simplifying the design and decreasing overall infrastructure requirements.
- Pipe Routing Challenges: The exposed nature of the structural columns prevented vertical pipe drops from being aligned with the primary supports. To overcome this, we engineered the siphonic pipework to follow the gradient of the stand, transitioning from high to low levels while maintaining hydraulic efficiency.
- Architectural Integration: We carefully aligned the siphonic system with the aesthetic and spatial requirements of the stand, ensuring the pipework remained concealed where possible and did not detract from the overall design intent.
Technical Outcomes
Our solution achieved several key outcomes:
- Optimised Drainage Infrastructure: The siphonic design significantly reduced the size and number of downpipes required, alleviating Grimshaw Architects’ primary concerns regarding spatial constraints.
- Efficient System Performance: The high-capacity flow rate of the siphonic system ensured efficient rainwater management, even under heavy rainfall conditions, while maintaining the required fall to match the structural geometry of the stand.
- Preserved Aesthetic Integrity: The integration of the pipework into the stand’s structural framework upheld the architectural vision, ensuring a clean and unobstructed appearance.
Following the re-engineering phase, Elliott Construction Group contracted Capcon Engineering to execute the design, supply, and installation of the system during the construction phase. RKD Architects are now serving as the lead architectural consultants for this stage, with on-site work expected to commence in 2025.
Key Takeaways
The RDS Anglesea Stand exemplifies the value of early engagement and specialist collaboration in addressing complex engineering challenges. By introducing an advanced siphonic drainage solution, we not only resolved significant design conflicts but also delivered a more efficient, streamlined, and cost-effective approach.
This project highlights Capcon Engineering’s technical expertise in fluid dynamics, precision design, and collaborative problem-solving, all of which are critical in delivering innovative solutions for modern construction projects. As we prepare for the construction phase, we remain committed to ensuring that the upgraded stand meets the highest standards of performance and design excellence.
Looking for a drainage solution that meets the highest standards?
Get in touch with us today to discuss your project.
