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4 National Circuit, ACT

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Posted May 2, 2016

HORIZONTAL FIRE SEPARATION IN AN ATRIUM NVS™ NO VISIBLE SUPPORTS

By incorporating Coopers FireMaster® NVS™ horizontal fire curtain barriers on levels 2 & 4 the voids are able to be closed in fire mode. This reduces the compartment size to within the BCA requirements for Type A construction of not more than two interconnected floors, a floor area of less than 8,000m2 and office volume less than 48,000m3.

Project:  4 National Circuit, ACT
Architect:  Fender Katsalidis
Fire Engineer:  ARUP
Developer:  Lend Lease
Application:  Atrium
Completion:  August 2012

Technical Problem
The aesthetic design of each building includes a void similar to an atrium which interconnects 6 levels. This allows for introducing more natural light in to the building and increasing the opportunity for people to interact and share ideas. These features of the building add favourably to the 5 Star Green Office Design v3 target achievement for the project.

As there are 6 levels interconnected through the void, the large floor area and volume created this means that the building is required to meet the atrium provisions in Part G of the BCA. This is a very costly and restrictive in design.

Solution
By incorporating Coopers FireMaster® NVS™ horizontal fire curtain barriers on levels 2 & 4 the voids are able to be closed in fire mode. This reduces the compartment size to within the BCA requirements for Type A construction of not more than two interconnected floors, a floor area of less than 8,000m2 and office volume less than 48,000m3. This means that the building does not have an atrium in fire mode.

Two 9 meter wide by 17 meter draw NVS™ models were installed in the West building. These are the largest horizontal fire curtains installed in the world with No Visible Supports and achieve an FRL of -/120/-!

Benefits

  • NVS™ – No Visible Supports within the atrium void
  • Cost saving on atrium construction requirements
  • Cheaper solution than vertical fire curtains on multiple floors
  • Reduced maintenance costs with less curtains and no supports in the void
  • Allows points for Green Star ratings
  • Light weight construction does not require structural steel to support it
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