Prefabrication is the assembly of building units or components at a location removed from the jobsite. During preconstruction, Messer’s in-house experts analyze project scope and the supplier/subcontractor marketplace to determine if prefabrication opportunities exist for the project.

Prefabricated Units & Components

Prefabrication can come in many forms. Here are some examples of building elements that can be prefabricated:

  • Mechanical/electrical/plumbing (MEP) system assemblies, such as ceiling racks
  • Bathroom pods
  • Health care headwall assemblies

Benefits of Prefabrication

When implemented effectively, prefabrication is a benefit to a project’s cost, quality, safety and schedule. Prefabrication also enhances end-user satisfaction and sustainability.


  • Improves cost control by eliminating variables, like inclement weather
  • Waste is minimized at the jobsite, reducing costs for General Conditions (dumpsters and cleanup)
  • It removes the variation in on-site manpower, effectively reducing items such as portable toilets and subcontractor parking areas


  • Prefabricated components can be built earlier than they would be in traditional building methods – e.g. above-ceiling mechanical racks can be built before the floors are complete


  • When components are built off-site, waste is reduced, which keeps corridors and egress passes clean, leading to a safer workspace
  • When above-ceiling components are prefabricated, contractors are working in ergonomically-comfortable positions (not on ladders), reducing the risk of falls


  • All items are constructed in a controlled environment, which means they are free from exposure to weather
  • Materials are typically tested in the warehouse (off-site), and then re-tested once they are installed, ensuring every piece and part fits perfectly
  • Using Building Information Modeling (BIM) further enhances quality and reliability by removing potential material clashes before they occur

Maintenance & Operations

  • Maintenance staff can attend preconstruction meetings to help ensure the design and construction of prefabricated elements are done with maintenance considerations in mind


  • Waste is significantly reduced at both the shop and project locations because materials are ordered in specific lengths