Site Installation & Maintenance
Skilled site teams delivering safe, precise installation and ongoing maintenance of structural, marine and mechanical engineering works — wherever the project demands.
Expert installation and maintenance, on site and on time
Our experienced site teams take engineering solutions from the workshop to the field — installing, commissioning and maintaining critical structural and mechanical works in live, constrained and safety-critical environments.
From heavy lifting and structural jacking to bearing replacement and planned maintenance, we deliver works safely, efficiently and to the highest standards, keeping assets operational for the long term.
A complete site delivery service
We combine skilled labour, specialist plant and engineering expertise to install and maintain works safely in the most demanding environments.
Installation & Commissioning
We install and commission structural, marine and mechanical works to exacting tolerances, ready for long-term service.
What this includes
Planned & Reactive Maintenance
We keep critical assets safe and operational through inspection, planned maintenance and rapid reactive repairs.
What this includes
Temporary Works & Access
We plan and provide the temporary works, access and lifting strategies needed to deliver site works safely.
What this includes
Installation & maintenance across demanding environments
Our site teams deliver in live, operational and access-restricted settings where safety and precision are critical.
Installation & maintenance in action
Examples of site teams delivering safe, precise installation and maintenance across structural, marine and mechanical works.
Tower Bridge Bascule Strengthening
Procurement and manufacture of materials, manufacture and precision machining of new components, removal of existing pawl bearing pads, removal of existing rivets, drilling and fixing new T-Piece strengthening plates and new pawl bearing pads
Salford Rise Bearing Supply & Installation
Design and manufacture of bridge bearings, design and implementation of temporary jacking support to bridge beams, structural levelling of bridge on jacking cylinders, bearing installation and grouting, de-jacking of new bridge and removal of temporary works
Ramsgate Port Pontoon Refurbishment
Temporary works design and implementation, structural jacking, manufacture, and replacement of Bankseat wheels, pins, bushes and cheek plates, manufacture and replacement of brow link bearing, manufacture and replacement of dolphin donut wearing pads, manufacture, and replacement of 4x Bankseat mooring chains and MPI inspection and weld repairs to pontoon bearings
Port of Dublin
Project management, craneage and lift plans, removal of existing clevis and gimble pins, removal of the existing RORO cylinders onto heavy haulage, lifting and placing new RORO cylinders into position, installation of new pins into clevis and gimbles
Newhaven Port Berth 1 Linkspan Refurbishment
Project management, bearing design, manufacture and replacement with temporary works, manufacture, painting and replacement of 60no new Linkspan bridge beams, manufacture, painting, and replacement of 18no new Linkspan deck plates with anti-slip resin, design, manufacture and replacement of hydraulic cylinders and replacement of the Linkspan guide wheels and rails
Port of Milford Haven Pilot Pontoon
Project management and co-ordination, supply of vessel craneage, removal of existing pilot jetty pontoon and gangway, including subsurface diver cutting, installation of new H Piles, installation of new pontoons, installation of new ladder, installation of new gangway and upper platform landing area
Delivered to the highest standards
Safe, reliable site delivery depends on skilled people, robust procedures and recognised standards. 3RS Engineering combines practical site experience with rigorous quality and safety management, backed by recognised accreditations.
Site Installation & Maintenance FAQs
Do you provide your own site teams and plant?
Yes — we deliver with skilled, directly-employed site teams and specialist plant, supported by our own engineering and temporary works expertise.
Can you work in live and operational environments?
Yes. We regularly deliver installation and maintenance in live highways, marine and operational settings, planning works around possessions and shifts to minimise disruption.
Do you offer planned maintenance contracts?
Yes — we provide inspection, planned maintenance programmes and rapid reactive repairs to keep critical assets safe and operational.
Can you handle heavy lifting and structural jacking?
Yes. Heavy lifting, rigging and structural jacking are core capabilities, supported by full temporary works design and lifting strategies.
Which sectors do you support?
Primarily highways and bridges and marine infrastructure, alongside general civil and mechanical engineering projects.