Nepean Hospital Prefabricated Services Riser

Nepean Hospital Prefabricated Services Riser


Location: Sydney, New South Wales

Client: Statewide Mechanical

Scope: Structural design of fire-rated external mechanical services risers to facilitate installation and boost the capacity of an operational hospital 

Design Achievements: 

  • Prefabrication allowed for riser installation within a day 
  • Riser was lifted and rotated safely from horizontal to vertical, then lifted into position over an operational hospital

Design Considerations:

  • Anchoring to the existing building whilst facilitating movement (inter-storey drift) in a seismic event
  • Bridging different fire compartments within the hospital, the riser design needed to resist both an internal and external fire source. 

Project Features:

  • The riser was lined with preinstalled SpeedPanel walls on two sides to facilitate installation, while intumescent paint was used to achieve the structural performance of the steel under fire 
  • This riser is one of the largest and heaviest prefabricated risers we have completed, with a lifted mass of 15,000kg and a height of 16.3m