Construction guide
Warehouses
Big open volumes and high stacked storage make fire the main design issue in a warehouse, followed by earthquakes acting on racking and tall walls. Here is what shapes an NZ warehouse or logistics building.
NZS 4541:2020Sprinkler standard, now covering in-rack sprinklers for warehouses and very large buildings over 11,000 m² [1]
NZS 4219Seismic restraint for tanks, fire pumps and other engineering systems [2]
H1/AS2Energy efficiency route for non-housing buildings over 300 m² [3]
Key design issues
Fire
- Storage height and the goods stored set the fire hazard, and so the sprinkler design.
- NZS 4541:2020 covers tall and large buildings and in-rack sprinkler systems for warehouses [1].
- Large sprinkler systems need water storage and fire pumps; restrain them to NZS 4219 [2].
- Fire and Emergency NZ publishes designers’ guidance on how firefighters use sprinkler systems [4].
Structure and racking
- Portal frames and tilt-slab walls are designed for wind and earthquake.
- Pallet racking is a structure in its own right; get it designed and certified for earthquakes, including the slab it sits on.
- Sprinkler pipework seismic bracing was brought into line with NZS 1170.5 in the 2020 standard [1].
Slab and yard
- Floor flatness for high-reach forklifts, joint layout and slab thickness for rack leg loads.
- Heavy-duty pavements, truck turning and stormwater treatment for the yard.
Energy and comfort
- Buildings over 300 m² that aren’t housing use H1/AS2 or H1/VM2 for energy efficiency [3].
- Roof insulation, skylights and LED high-bay lighting cut running costs; conditioned office areas need their own envelope.
Compliance after completion
- The compliance schedule lists specified systems such as automatic sprinklers (SS1), automatic doors (SS3), mechanical ventilation (SS9) and fire separations and exit signs (SS15) [5].
- The owner then gives the council a building warrant of fitness (BWOF) every year [5].
- Hazardous substances add WorkSafe requirements on top of the Building Code.
Tools for this building type
Sources
Numbers in square brackets refer to these sources, checked October 2026. Standards and rules change; confirm the current edition with your council and the issuing body before you rely on them.
- Standards NZ: Updated fire sprinkler standard NZS 4541 released
- Christchurch Airport commercial design guidelines: fire safety (2024)
- MBIE: H1/AS2 Acceptable Solution (buildings other than housing over 300 m²)
- Fire and Emergency NZ: Designers’ guide to firefighting operations, automatic sprinkler systems
- Porirua City: Compliance schedules and specified systems