• Type 3: Steel Portal Frame

Entec provides a bespoke design & build service for prefabricated plant rooms. A plant room, otherwise known as an e-house, switchroom, industrial plant room, motor control centre (MCC room) or mobile substation, are enclosed spaces housing a variety of equipment, ranging from LV or HV electrical infrastructure to generators, pumps, boilers or HVAC equipment.

Prefabricated Plant Rooms

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Mark Knowles
Director - Strategic Sales & Innovation

Built to Last. Designed for Performance.

Our Type 3 room is the ultimate in strength and longevity. Our clients specify Type 3 rooms for the more demanding applications, such as high seismic or wind loads, long design life, or arduous fire-rating requirements.

We achieve these performance levels with our Steel Portal Frame build design.

What is a Steel Portal Frame plant room?

A steel portal frame plant room is a prefabricated structure built around a rigid steel skeleton. The frame is made up of structural steel columns and rafters, forming a robust and self-supporting enclosure. The building is then clad externally and lined internally to suit the application.

This construction method allows us to deliver:
  • Exceptional strength and rigidity
  • Long design life (up to 50 years)
  • Seismic performance to Importance Level 4
  • Large internal spans with no internal columns
  • Customisable layouts and access points

Why Choose Steel Portal Frame?

Steel portal frame rooms are ideal for clients who need a permanent, high-specification solution. They’re particularly suited to:
  • Critical infrastructure (power, water, gas)
  • Remote or high-risk environments
  • Large or heavy equipment installations
  • Projects requiring long-term asset performance
We’ve delivered steel portal frame rooms to some of the most demanding sites in New Zealand and Australia. These rooms are designed to be transported by road and craned into place, ready for final connection and commissioning.

Key Features of Our Steel Portal Frame Rooms

Every room is custom-built to suit the project. Common features include:
  • Structural steel base and portal frame
  • External cladding and internal lining
  • Marine-grade paint systems for corrosion resistance
  • Thermal and acoustic insulation
  • HVAC systems
  • Fire, smoke and gas detection
  • Cable management systems
  • Multiple personnel access points
  • Commercial-grade flooring
  • Lifting points and structural certification
We also design for future mobility—so if your plant room needs to be relocated down the track, we can build that flexibility in from the start.

Prefabricated Plant Room Brochure

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