Off-Site Manufacturing (OSM)

Off-Site Manufacturing (OSM)

Off-Site Manufacturing (OSM)

Pre-fabrication, modularisation and digital construction are employed on most of our projects to drive efficiency throughout the build process. Through early engagement and collaboration, our approach allows us to continuously deliver value to our clients by making a positive impact on key project drivers such as programme, Q-EHS, budget and building life cycle costs, while ensuring the best possible project outcome for our clients.

Kirby has utilised off-site fabrication and modular construction approach for many years and has dedicated workshops to meet specific client requirements. The benefits of OSM can be summarised as follows:

  • Reduced on-site construction duration.
  • Reduced management costs and risk.
  • Higher quality of final product is achieved more efficiently in a controlled factory environment specifically set up for fabrication.
  • Depending on the module type, manufacturing in factory environment can generate additional cost savings even when additional structural and transportation costs are considered.
  • Reduced on site commissioning duration post functional module testing off-site.

We have a selection of case studies that provide the details on the recently completed projects involving modular construction.

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Featured Case Study

Project: Project Aries

Location: Dublin, Ireland

Value: €75m

Sectors: Data Centres

Services: Electrical Services and Instrumentation, Mechanical Piping & HVAC Services, and Off-Site Manufacturing

Confidential Hyperscale Data Centre, Ireland

Kirby was appointed as the main mechanical and electrical contractor on a 60MW hyperscale data centre project in Dublin for a leading cloud computing provider.

Project Aries involved the construction of two new data centres including commissioning to level 3 and support to client during level 4 and 5. Challenging deployment dates drove the decision making towards modular construction, which ensured design optimisation, reliability and efficiency.


Kirby scope of works included the installation and commissioning of all mechanical and electrical services.

The electrical systems installed by Kirby included:

  • MV Distribution
  • LV Distribution
  • Generator
  • UPS
  • General & Emergency Lighting
  • General Service Power
  • Mechanical Plant Service Power
  • Fire Detection & Alarm
  • Earthing & Bonding
  • Lightning Protection

The mechanical systems installed by Kirby included:

  • Supply & Extract Ventilation Distribution
  • DWS
  • VRF Air Conditioning
  • Leak Detection
  • BMS
  • Server Room Air Conditioning
  • Rain Water Harvesting
  • Humidification Water
  • Soils & Waste
  • Domestic Water Services






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