FEATURED PROJECT
Hull Botanic Gardens Superstructure
HULL BOTANIC GARDENS
DESCRIPTION
This project involved a comprehensive renovation and enhancement of Northern Rail’s Hull Botanic Gardens maintenance depot, delivering significant rail depot infrastructure upgrades and structural modifications to the existing rail shed building.
The works focused on replacing a life-expired shed roof and upgrading the depot’s servicing capability to support new rolling stock, including Class 170 and Class 155 vehicles, while maintaining depot operations and minimising disruption. The existing roof structure was dilapidated, with prestressed beams requiring replacement, and the depot infrastructure needed enhancement to meet modern operational and safety standards.
Working in partnership with Cairn Cross, Hexagon undertook a series of detailed surveys, structural assessments, and design development activities to enable the safe replacement of the roof and integration of new facilities. The scope included the introduction of roof access equipment, jacking systems, pedestrian footbridge upgrades, and the provision of new fuelling, CET, tanking, and AdBlue facilities, complete with weather protection canopies.
The project also delivered a new stabling road for 3-car Class 170 units, incorporating defined walking routes and Safety TrackPan GRP walkways to improve safe access around rolling stock. Additional works included the design of a bespoke steel exoskeleton over the existing building, reinforced concrete foundations for a 12-tonne jib crane, new permanent way, lighting, drainage, and mechanical and electrical systems tied into the existing depot infrastructure.
Services used
Desktop Studies and Feasibility Reports
REQUIREMENTS
Hexagon provided a full design solution covering all critical aspects required for the successful integration of the new system, including:
- Replacement of life-expired shed roof with minimal disruption to ongoing operations
- Increase depot servicing capability to support new rolling stock fleetsProvision of:
- 4No. jacking systems on Road 1
- Roof access equipment (boxing ring) for Class
170 and Class 155 vehicles - Additional mesh guarding to the existing
pedestrian footbridge - Fuelling, CET, tanking and AdBlue services with
weather protection canopy - New stabling road for 3-car Class 170 vehicles
with defined walking routes - Reinforced concrete foundation for a 12-tonne
jib crane - Network Rail–compliant design in accordance with the GRIP process
- Existing buried services surveys
- Desktop studies, including gauging, infrastructure dimensions, and rolling stock clearances
- Site investigations to assess the condition of building steelwork, concrete structures, and permanent way
- Ground investigations including core sampling, condition surveys, and 3D point cloud survey
- Outline and detailed design drawings, including:
- Foundation layout plans and structural
calculations - Steelwork and fabrication details
- Drainage, cladding, and piling designs
- Bespoke design of a steel exoskeleton to over-clad the existing structure
- Mechanical and electrical design covering ventilation, lighting, power supplies, charging systems, CCTV, drainage, and troughing integrated with existing depot systems
The design met with the client’s requirements and NR_L2_CIV_003 Issue 7- Engineering and Architectural Assurance of Building & Civil Engineering Works
See more projects
Southampton AVIS
Hexagon provided the full design solution for the new AVIS facility under a design-and-construct contract.
Kings Heath AVIS
Hexagon provided the full design solution for the new AVIS facility under a design-and-construct contract.