CDHB Acute Services Building Scan2BIM

7001 Cdhb Cam01 Aerial Press Release Lr
7001 Cdhb Cam01 Aerial Press Release Lr

An investment already realised in operational savings, the working BIM model accurately captures all major clinical services and administration buildings.

An investment already realised in operational savings, the working BIM model accurately captures all major clinical services and administration buildings.

This project involved the significant rebuild of Christchurch Hospital. The 62,000m2 Acute Services Building incorporates new emergency department, radiology, CSSD, 12 surgical theatres, intensive care unit, two six-level inpatient ward blocks, purpose-designed children’s facilities, rooftop helipad and support facilities and infrastructure. 

While BIM was not contracted for consultants, all used BIM processes to aid documentation and coordination. Warren and Mahoney Technologies was engaged to provide advice and guidance to bring the model up to the level required by tendering contractors. This resulted in the implementation of a BIM strategy, BIM documents (from developed design through to occupation) including a BIM Execution Plan, Schedule, Specification Clauses and tender assessment. 

In addition, incomplete and inaccurate documentation for the existing buildings resulted in WMT being commissioned to create a BIM model to accurately capture 100,705m2 of building and surrounding site. This has resulted in a working BIM model accurate to 20mm and capturing all the major clinical services and administration buildings on the Christchurch Hospital campus.


This is a highly complex healthcare building that needed to be integrated into the surrounding hospital campus.

Our role included:

  • Guiding consultants in the delivery of BIM
  • Advising contractors what level model and embedded data they would receive and how to use them
  • Preparing BIM Execution Plan, contract schedules and tender documents
  • Guiding our client through the use of technology and new BIM processes
  • Scan-to-BIM, digital laser scanning and modelling of existing facilities
  • Consultancy and advice on ongoing AM/FM engagement

The investment in BIM has already been realised in operational savings. The model we set up provided an accurate, searchable, indexed database for all functional spaces, including rooms, offices and hallways. CDHB was able to re-purpose and reuse this database for design assessment in other parts of campus, plus ongoing seismic, fire protection and insurance applications.


Warren and Mahoney Technologies has been engaged extensively across multiple contracts for this project. In most cases, WMT was engaged to retrospectively solve issues or highlight them for future phases:

  • New Acute Service Project Architect – Brad Sara was involved throughout the design phases as Project Architect and Shell & Core Architect. He was responsible for the shell and core delivery and assisting in all architectural aspects of the project.
  • Principal BIM Consultant – WMT provided advice to the Ministry on what would be required to bring model and contractual documents up to the level required by contractors. Jason Howden designed and set up the technological framework for the transition to 3D BIM and the Scan-to-BIM project.
  • Principal BIM Consultant to CDHB – We advised CDHB on the education and implementation of BIM and FM for the Christchurch Hospital campus 
  • Existing Campus BIM Model – We developed a highly accurate BIM of all existing buildings and across the campus.