Standards New Zealand has developed a new draft Standard Fire-resistant doorsets and smoke-control doors (DZ 4520). The draft Standard is available for public comment until 22 January 2010 and publication is scheduled for June 2010.
DZ 4520 provides manufacturers, suppliers, and installers with minimum requirements for the testing, construction, and installation of fire-resistant doorsets and smoke-control doors designed to help prevent loss of life and protect the openings in walls and elements of construction that are required to resist the passage of fire or smoke.
Smoke is a major contributor to fatalities and serious injury in structural fires and adequate smoke control systems are necessary in buildings to protect life and property. With the introduction of a performance based New Zealand Building Code (NZBC) the use of smoke control doors in buildings has increased, leading to a need to adequately specify and install doors having a quantified level of performance.
DZ 4520 is intended to complement the fire-protection requirements of the NZBC and to be used with the appropriate clauses of AS 1530.4 and AS 1530.7. DZ 4520 is based on the equivalent Australian Standards, AS 1905.1:2005 Components for the protection of openings in fire-resistant walls – Fire-resistant doorsets and AS 6905:2007 Smoke doors.
In addition to specifying requirements for fire-resistant doorsets and smoke-control doors, DZ 4520:
- specifies parameters for door performance based on allowable air-leakage rates at given temperatures and pressures
- introduces a smoke rating for doors (similar to a fire rating) by which the results of testing to the test method Standard, AS1530.7, can be applied
- also applies to transom panels over doors where the panels are contained within the doorframe and form part of the doorset
- does not apply to lift-landing doors.
The committee includes representatives of the following nominating organisations:
- Department of Building and Housing
- Fire Protection Association New Zealand
- Institute of Professional Engineers New Zealand
- Institution of Fire Engineers
- Local Government New Zealand
- New Zealand Fire Service
- Property Council New Zealand.
→View or download the draft Standard