Christchurch Hospital

Christchurch Hospital

Project
Acute Services Building, Christchurch Hospital, New Zealand 

Engineer 
Jacobs Engineering 

Building Contractors 
PB Contractors 

Construction 
2016-18

Construction 
2015-17

Products
Over 70,000m2 of USG Boral lining wall & ceiling products including SHEETROCK®, Firestop® and Multistop™ 4. 100,000LM of USG Boral Metal  Stud Track

Scope
62,000m² building including 12 operating theatres & procedure rooms, intensive care unit, emergency department, radiology department & inpatient ward blocks for 400 beds

USG BORAL STEEL FRAMING SOLUTION MEETS SEISMIC REQUIREMENTS

Currently being constructed by CPB Contractors, the Acute Services Building at Christchurch Public Hospital is the largest New Zealand government project of the Canterbury rebuild. The 62,000m² building will house 12 new operating theatres and procedure rooms, an expanded intensive care unit and emergency department, a state-of-the-art radiology department and inpatient ward blocks for 400 beds — including purpose-designed spaces for children.

Involved in the project from its early design stages, USG Boral was tasked with working with CPB and Jacobs Engineering to develop a steel-framed alternative to the specified timber-framed walls — a move which will eliminate moisture issues and help reduce construction time.

BILL HILL, PROJECT MANAGER, CPD CONTRACTORS

“It’s a challenge to come up with a steel-framed solution that meets [Importance Level 4] seismic requirements.”

SEISMIC PERFORMANCE ESSENTIAL

As the building has been designed to Importance Level 4 (IL4) standards, seismic performance was also key. The walls of the Acute Services Building had to be designed to deal with an out-of-plane movement of 50mm, so a specifically designed deflection head/ seismic joint was developed and tested to deal with this. The testing was carried out with the Project Engineers present, so they could see the performance of the wall’s design.

“It’s a challenge to come up with a steel-framed solution that meets those seismic requirements,” explains Bill Hill, Project Manager, CPB Contractors. The solution USG Boral developed uses 100,000 linear metres of USG Boral Metal Wall Studs and Track, using a G550 grade steel to provide exceptional strength.

BILL HILL, PROJECT MANAGER, CPD CONTRACTORS

“Over 200 different wall types were originally specified. We went to USG Boral to come up with a way of simplifying that as they have a number of different board types with multiple functions.”

SIMPLIFYING PARTITION TYPES

In addition, a range of USG Boral plasterboard solutions were specified for the project. “A simplification of the partition types is what we were trying to achieve,” explains Bill. “Over 200 different wall types were originally specified. We went to USG Boral to come up with a way of simplifying that as they have a number of different board types with multiple functions.”

The final specification featured just three plasterboard types supplied by USG Boral: SHEETROCK®, Multistop™ 4 and Firestop® Boards. Multistop™ 4 Technical Board will be the most extensively used, with 110,000m² specified for wall linings due to its exceptional moisture, fire and impact resistance and good acoustic properties. “With the one board we can cover a lot of different scenarios,” says Bill.

With installation of both framing and plasterboard well underway, CPB are pleased with how the project is progressing. The Acute Services Building is due for completion in late 2018.

Download the case study here.