Are Deadbolts Allowed on Fire Doors in New Zealand? If you’re designing or specifying fire doors in New Zealand, you might wonder: are deadbolts allowed on fire doors? The short answer is no. Deadbolts and NZS4520:2010 Under NZS4520:2010, deadbolts are explicitly not permitted on fire doors. The standard defines this restriction as: “A bolt or … Continue reading Is it true that a deadbolt can’t be fitted to a Fire Door?