What is AS/NZS 1801?
AS/NZS 1801 is the Australian and New Zealand standard for industrial safety helmets (hard hats). It specifies the design, performance, and testing requirements that all hard hats must meet to be legally sold and used on Australian work sites.
This standard was introduced to ensure that hard hats can withstand the specific hazards commonly found in Australian construction, mining, and industrial environments.
The Rigorous Testing Process
Before a hard hat can be certified to AS/NZS 1801, it must pass a series of brutal tests designed to simulate real-world workplace hazards.
1. Impact Resistance Test
Test Method: A 5 kg steel striker is dropped from a height of 1 meter onto the crown of the helmet.
Pass Requirement: The force transmitted through the helmet to a dummy headform must not exceed 5,000 Newtons (N), and the helmet shell must not crack or break through.
Real-World Simulation: Falling tools, dropped materials, or overhead strikes.
To put this in perspective, 5,000N is equivalent to about 500 kilograms of force pressing down on your head. A quality hard hat absorbs and distributes this energy to protect your skull and brain.
2. Penetration Resistance Test
Test Method: A 3 kg conical striker with a 60-degree point is dropped from 1 meter onto the helmet.
Pass Requirement: The striker must not penetrate the shell or make contact with the headform inside.
Real-World Simulation: Sharp falling objects like screws, nails, or pointed debris.
3. Lateral Deformation Test
Test Method: The helmet is compressed laterally between two flat platens with increasing force.
Pass Requirement: The helmet must maintain its shape and not deform beyond specified limits.
Real-World Simulation: Side impacts, being caught between objects, or crush hazards.
4. Chinstrap Strength Test
Test Method: The chinstrap (if equipped) is pulled with increasing force.
Pass Requirement: Must withstand a minimum force without breaking or detaching.
Real-World Simulation: Helmet being knocked off or caught during a fall.
5. Flammability Test
Test Method: The helmet is exposed to direct flame for a specified duration.
Pass Requirement: Must not ignite, and any burning must self-extinguish within seconds.
Real-World Simulation: Welding sparks, electrical arcs, or fire hazards.
Types of Hard Hats: Type 1 vs Type 2
AS/NZS 1801 classifies hard hats into two types based on the areas of protection they provide:
| Type | Protection Area | Best For |
|---|---|---|
| Type 1 | Top of head only | General construction, warehouses, manufacturing |
| Type 2 | Top + sides of head | Confined spaces, trenches, overhead work, mining |
⚠️ IMPORTANT: Type 1 helmets do NOT protect against lateral (side) impacts. If your work involves confined spaces, working under structures, or any risk of side impacts, you MUST use a Type 2 helmet.
Hard Hat Classes: Electrical Protection
Hard hats are also classified by their electrical insulation properties:
- Class E (Electrical): Tested to withstand 20,000 volts. Required near electrical hazards.
- Class G (General): Tested to 2,200 volts. Standard for most construction work.
- Class C (Conductive): No electrical protection. Used where electrical hazards don't exist but ventilation/weight is a priority.
Material Matters: What Hard Hats Are Made Of
Modern hard hats use advanced materials engineered for maximum protection:
ABS Plastic (Most Common)
- Excellent impact resistance
- Good heat resistance (-40°C to +50°C)
- Lightweight and durable
- Resistant to most chemicals and oils
- Lifespan: 5 years from date of manufacture
Polycarbonate
- Superior impact resistance (30% stronger than ABS)
- Better temperature resistance (-50°C to +60°C)
- More expensive
- Lifespan: 5 years from date of manufacture
High-Density Polyethylene (HDPE)
- Excellent chemical resistance
- Good electrical insulation
- Lower impact resistance than ABS/PC
- Common for Class E electrical work
- Lifespan: 5 years from date of manufacture
CRITICAL: UV exposure, chemical exposure, and physical wear degrade hard hat materials over time. Even if a helmet looks fine, replace it after 5 years or immediately after any significant impact.
The Suspension System: The Unsung Hero
The suspension system inside your hard hat is just as important as the shell itself. It:
- Creates a crucial air gap (25-50mm) between your head and the shell
- Absorbs and distributes impact energy
- Keeps the helmet stable and comfortable
- Allows ventilation to prevent heat stress
Types of Suspension Systems
- 4-Point: Basic, lightweight, adequate for low-risk environments
- 6-Point: More stable, better weight distribution, recommended for most work
- Ratchet vs Pin-Lock: Ratchet adjusters are easier to customize for perfect fit
⚠️ NEVER remove or modify the suspension system. It's engineered specifically for that helmet model and removing or adjusting it voids certification and drastically reduces protection.
When to Replace Your Hard Hat
Replace your hard hat immediately if:
- It's been impacted — Even if there's no visible damage, internal fractures may have formed
- It's over 5 years old — Degraded materials lose protective properties
- Shell shows cracks, dents, or discoloration — Signs of UV/chemical damage
- Suspension system is torn or worn — Can't absorb impacts properly
- It no longer fits properly — Must sit level and snug without excessive pressure
- It's been exposed to extreme heat or chemicals — Compromises structural integrity
The Real-World Difference
Testing data from WorkSafe Victoria shows that:
- Properly worn, certified hard hats reduce head injury severity by 85%
- Hard hats prevent an estimated 30,000 injuries per year in Australia alone
- Workers not wearing hard hats are 12x more likely to suffer traumatic brain injury
- The average cost of a head injury claim is $147,000 — far more than the cost of quality PPE
SafetyHats.com.au — Trusted Since 2007
Nearly 20 years of supplying AS/NZS 1801 certified hard hats to Australian workers. Every helmet we sell has passed the rigorous testing standards outlined in this article.
Choosing the Right Hard Hat
When selecting a hard hat, consider:
- Type: Type 1 for general use, Type 2 for lateral impact protection
- Class: Class E for electrical work, Class G for general construction
- Ventilation: Vented models for hot environments, non-vented for cold/wet conditions
- Accessories: Lamp brackets, face shields, earmuff attachments
- Comfort: 6-point ratchet suspension for all-day wear
- Color: High-vis colors (yellow, orange) for maximum visibility