Successful Structural Design & Lifting Assessment at Bolton Water Treatment Works

At Shepherd Gilmour, we specialise in delivering practical structural engineering solutions, focusing on quality, efficiency, and client satisfaction. Our recent collaboration with Fluid Sealing & Engineering at Bolton Water Treatment Works allowed us to showcase our expertise in designing steelwork platforms and lifting beams, while also performing a thorough lifting and installation assessment in accordance with relevant Eurocodes and British Standards.

3D Isometric of Platform Structure Design

Here’s a breakdown of our key achievements on this project:

Optimising Steelwork Design for Cost and Efficiency

The first task in this project was to optimise the steelwork layout and geometry to ensure the most efficient design possible. By reviewing every aspect of the design, we were able to minimise material usage, which not only helped reduce costs but also ensured the steel structure was strong and stable enough to meet the demands of the Bolton Water Treatment Works. This approach is typical of our commitment to delivering cost-effective, high-performance structural designs.

3D Isometric - Unity Check Diagram

Wind Load Calculation in Accordance with Eurocode

Another critical aspect of the platform design was calculating the wind loads acting on the open sections. In line with Eurocode 1 (EN 1991-1-4), we carefully assessed the wind forces that could impact the platform’s structural integrity. Taking into account factors such as the location, height, and exposure of the platform, we used the appropriate wind speed and pressure coefficients to accurately determine the wind loads. The open sections of the platform, which are more susceptible to wind forces, required detailed calculations to ensure they could withstand the maximum expected wind pressures. This thorough analysis helped us optimise the platform design, ensuring it would remain stable and safe under varying environmental conditions.

Wind Load Diagram Example (Showing Wind in -X direction)

Clear Communication and Client Collaboration

Throughout the project, we maintained clear and open communication with Fluid Sealing & Engineering. This close collaboration enabled us to make timely design reviews and suggestions for improvements. By staying in constant touch with our client, we ensured that we delivered a solution tailored to the site’s specific needs while adhering to the highest engineering standards.

Detailed Non-Linear FEA of the Curved Lifting Beam

In addition to the general design work, we also undertook a detailed non-linear finite element analysis (FEA) of a curved section of the lifting beam, using Oasys GSA software. This analysis was crucial in accurately modelling the complex behaviour of the beam under load, taking into account the curvature and any potential deformations that might affect the performance during the lifting process. By simulating real-world conditions, including factors such as material properties and boundary conditions, we were able to ensure that the curved lifting beam would perform safely and efficiently under the required loads. This comprehensive analysis provided valuable insights into the beam's structural integrity and helped refine the design before moving forward with the installation phase.

None-Linear FEA of Curved Lifting Beam

Design Improvements for Seamless Installation

As we progressed with the design, we proposed several changes that enhanced both the ease of installation and the functionality of the steelwork platform. These practical adjustments allowed the platform to be installed smoothly and efficiently, ensuring that the project remained on schedule and within budget.

Lifting Assessment Using 6-Point Lift Validation

A key component of the project was ensuring that the lifting and installation process was executed safely and efficiently. We performed a comprehensive lifting assessment using a 6-point lift as demonstrated below.

Suggested Rigging Arrangement

3D Platform showing temporary bracing for lifting

Once modelled, the lifting assessment was carefully reviewed to determine whether any instabilities or areas of high stress would develop. It was decided by the design team to introduce temporary bracing in key areas, to stiffen the frame & thereby ensure stability during the lift. The temporary bracing is shown as thin green "Analysis elements" in the above diagram.

The deflections and moment distributions were once again analysed and reviewed by the design team for consistency with expectation as seen below. Following this review, the design team were satisfied the lift could be safely undertaken by incorporating the temporary bracing and lifting using the proposed method.

Moment distribution diagram of lifted platform

This not only validated the effectiveness of our approach but also gave us confidence that the platform would be safely and securely lifted. To facilitate the lifting process, we divided the platform into two sections, ensuring a smoother installation process.

Detailed Structural Calculation Reports with Clear Visuals

We understand the importance of providing clear and transparent documentation to our clients. That’s why we delivered a detailed structural calculation report, summarising our design process with easy-to-understand images and descriptions. This clear, visual breakdown made it easy for the client and all stakeholders to grasp the technical aspects of the project, ensuring everyone was on the same page.

Efficient Turnaround with Consistent Communication

With a focus on delivering high-quality results quickly, we prioritised an efficient turnaround without sacrificing the integrity of the design. We kept Fluid Sealing & Engineering informed at every stage, providing regular updates and responding promptly to queries. This ensured the project progressed smoothly and helped avoid any potential delays. Furthermore, it enabled us to remain engaged with our client, taking on board their feedback and welcoming their on-site practical knowledge to inform our design assessment and tailor it to their individual needs and preferences. It also allowed us to manage and avoid risks associated with specific site constraints.

Successful Platform Installation at Bolton Water Treatment Works

Thanks to careful planning, thorough assessments and efficient communication, our client was able to confidently employ their skills on site, ensuring the steelwork platform was successfully installed at Bolton Water Treatment Works. We'd like to thank our client for their collaboration throughout the design phase and for the opportunity to work on this unique and interesting project & we look forward to many more in future.

At Shepherd Gilmour, we pride ourselves on providing bespoke structural engineering solutions that prioritise safety, efficiency, and clear communication. This project is just one example of how we work alongside clients to develop effective solutions for all manner of complex structural challenges.

If you’re looking for an experienced structural engineering partner that can optimise your designs and streamline your installation processes, get in touch with Shepherd Gilmour today. We’re here to help bring your next project to life.