Quick Summary: Under the Australian Dangerous Goods (ADG) Code, a placard load in NSW exists when the total quantity of dangerous goods on your vehicle exceeds the threshold set out in Table 3.2.1 of the ADG Code for the relevant transport category. Transport Category 1 goods always need placards regardless of quantity. Transport Category 2 goods require placards when the aggregate exceeds 1,000 kg or litres. Transport Category 3 goods require placards when the aggregate exceeds 10,000 kg or litres. If your load meets or exceeds these thresholds, you need placards on the vehicle, an Emergency Information Panel (EIP), a Dangerous Goods Licence (TLILIC0001), and the correct safety equipment.
Key Takeaways
- A placard load is triggered by quantity thresholds in ADG Code Table 3.2.1 — not by the mere presence of dangerous goods.
- Transport Category 1 goods (e.g. ammonium nitrate, some organic peroxides) always require placards — any quantity, zero threshold.
- Transport Category 2 goods (most Class 3 flammable liquids, Class 8 corrosives) trigger placards at 1,000 kg/L aggregate.
- Transport Category 3 goods (many Class 9 miscellaneous, some Class 5.1 oxidisers) trigger placards at 10,000 kg/L aggregate.
- For mixed loads of different transport categories, you apply the aggregation formula — goods from lower categories can push a combined load over the threshold.
- Carrying a placard load means you need a DG licence, vehicle placards, an EIP, fire extinguishers, and approved transport documentation.
- Kells Safety Centre (RTO 91528) delivers the DG Licence course (TLILIC0001) across NSW — covering placard load calculations, ADG Code compliance, and vehicle marking requirements.
What Is a Placard Load Under the ADG Code?
A placard load is a consignment of dangerous goods where the total quantity on the vehicle exceeds the threshold specified in Table 3.2.1 of the ADG Code. The threshold depends on the transport category assigned to each dangerous goods entry in the Dangerous Goods List (Table 3.2 of the ADG Code). When the aggregate quantity of goods from the same transport category exceeds the stated threshold, the vehicle must display class placards, and the driver must hold a NSW Dangerous Goods Licence (TLILIC0001).
It’s not the type of packaging that determines whether a load is placarded — it’s the total amount. A single 200L drum of Class 3 flammable liquid (Transport Category 2) does not create a placard load because 200 litres is well below the 1,000-litre threshold. But 1,500 litres in an IBC or multiple drums cross the threshold, and the vehicle becomes a placard load requiring full ADG Code compliance.
The ADG Code is administered in NSW by the NSW EPA, which issues and monitors DG licences. If you’re not sure whether your load needs a DG licence, see our guide on what loads require a dangerous goods licence in NSW.
How to Work Out If Your Load Needs Placards — Step by Step
Here’s the practical process NSW drivers and loaders use to determine placard requirements:
Step 1: Identify the Class and UN Number
Check the ADG Code Dangerous Goods List to find your product’s UN number, class, packing group, and transport category. This information is on the Safety Data Sheet (SDS), the product label, or the supplier’s DG classification documentation.
Step 2: Determine the Transport Category
The ADG Code assigns every dangerous goods entry to one of four transport categories. The transport category determines the placard threshold:
Step 3: Calculate the Aggregate Quantity
Add up the total quantity (in kg for solids, litres for liquids) of all dangerous goods on the vehicle that fall within the same transport category. If you’re carrying goods from multiple classes but the same transport category, you aggregate them.
Step 4: Compare Against the Threshold
Compare your total against the threshold for the transport category. If the total equals or exceeds the threshold, those goods constitute a placard load for that category.
Placard Load Thresholds — Transport Category Table
The table below summarises the ADG Code placard load thresholds from Table 3.2.1. These thresholds are based on the aggregate quantity of dangerous goods of the same transport category carried on a vehicle.
| Transport Category | Placard Load Threshold | Common Classes | Example Goods |
|---|---|---|---|
| Category 1 | Any quantity (0) | Class 1 (explosives), some Class 5.2, some Class 6.1 (very toxic) | Ammonium nitrate, organic peroxides, very toxic substances |
| Category 2 | 1,000 kg or L aggregate | Most Class 3, most Class 8, most Class 6.1, some Class 5.1 | Petrol (UN 1203), diesel (some entries), acids, alkalis, pesticides |
| Category 3 | 10,000 kg or L aggregate | Many Class 9, some Class 5.1, some Class 4.1 | Ammonium nitrate fertilisers (some), some miscellaneous DG |
| Category 4 | Not a DG for transport | — | Goods exempted from ADG Code transport requirements |
How Do Mixed Loads Work?
When you’re carrying dangerous goods from different transport categories on the same vehicle, you can’t simply look at each category in isolation. The ADG Code requires you to apply an aggregation formula across mixed transport categories to determine whether the combined load triggers placard requirements.
The approach is straightforward: for each transport category, add the goods in that category together and check against the threshold for that category. A load becomes a placard load if any one transport category exceeds its threshold. Goods in different transport categories do not add together — each category has its own calculation.
For example: 600 litres of petrol (Category 2, threshold 1,000L) and 8,000 kg of a Category 3 product (threshold 10,000kg) on the same vehicle do not constitute a placard load — neither threshold is reached. But 1,100 litres of petrol in the same vehicle does cross the Category 2 threshold and triggers a placard load.
What Changes When a Load Becomes a Placard Load?
Once your load crosses the placard threshold, the ADG Code imposes full transport compliance requirements. This is where the placard load designation has real operational consequences:
- Vehicle placards: Class placards must be displayed on the front, rear, and both sides of the vehicle. The ADG Code specifies placard dimensions, colour, and symbol placement.
- Emergency Information Panel (EIP): An EIP must be mounted on the vehicle showing the dangerous goods class, UN numbers, emergency contacts, and Hazchem code. See our EIP guide for full requirements.
- DG Licence: The driver must hold a NSW Dangerous Goods Licence (TLILIC0001), issued by the NSW EPA. Learn how to get a DG licence here.
- Fire extinguishers: The vehicle must carry fire extinguishers meeting the B-rating specified in ADG Code Table 12.1.
- Transport documentation: A transport document listing the DG class, UN number, packing group, quantity, and consignee details must be carried.
- Segregation: Mixed DG loads must comply with the segregation rules in Table 9.3 of the ADG Code.
- Route and parking restrictions: Placard loads may be restricted from certain roads, tunnels, and parking areas.
Not sure if your load needs placards? Get properly trained — the DG Licence course at Kells Safety Centre covers placard load calculations in detail.
Common Placard Load Scenarios for NSW Drivers
Scenario 1: Courier with Mixed Small DG Packages
A courier van carries 50 small packages, each containing 5 litres of a Class 3 flammable liquid (Transport Category 2). Total aggregate: 250 litres. This is well below the 1,000-litre threshold, so no placard load — no placards, no DG licence needed.
Scenario 2: Fuel Tanker (Petrol)
A fuel tanker carries 15,000 litres of petrol (UN 1203, Class 3, Transport Category 2). The threshold is 1,000 litres. 15,000 litres far exceeds the threshold — this is a placard load. The driver needs a DG licence, placards on the vehicle, an EIP, fire extinguishers, and transport documentation.
Scenario 3: Workshop Supply Delivery
A delivery van carrying 800 litres of paint thinner (Class 3, Transport Category 2) and 15,000 kg of a Class 9 product (Transport Category 3). The paint thinner is below its 1,000-litre threshold. The Class 9 product is below its 10,000 kg threshold. No placard load — neither category is exceeded.
Scenario 4: Mixed Chemical Delivery to Mining Site
A truck carries 1,200 litres of acid (Class 8, Transport Category 2) and 500 litres of an organic peroxide (Transport Category 1). The acid exceeds the 1,000-litre threshold for Category 2 — and the organic peroxide requires placards at any quantity under Category 1. This is a placard load on multiple counts.
ADG Code Placard Specification — What Must Be Displayed?
When a placard load is declared, vehicle placards must meet the ADG Code’s visual specification:
- Size: Minimum 250mm × 250mm for class placards on the vehicle body.
- Shape: Diamond shape, set at 45 degrees (square-on-point).
- Colour: The class colour as specified in ADG Code Table 1.4 — e.g. red for Class 3, white over red for Class 8, yellow over red for Class 5.2.
- Symbol: The class symbol (flame, skull and crossbones, acid, oxidising flame, etc.) in the upper triangle.
- Class number: In the lower corner of the placard.
- Placement: On the front, rear, and both sides of the vehicle, clearly visible.
An Emergency Information Panel (EIP) must also be displayed, showing the Hazchem code, dangerous goods class, UN number, and emergency contact information. EIPs are separate from class placards and serve as the primary emergency response tool for responders.
Part 9 — ADG Code Segregation and Mixed Class Rules
If your load contains more than one class of dangerous goods, you must check the ADG Code segregation table (Table 9.3). Some classes cannot be carried together on the same vehicle at all. Others can share a vehicle but must be physically separated by a minimum distance.
Key segregation conflicts include:
- Class 3 (flammable liquids) and Class 5.1 (oxidisers): Limited mixed transport — segregation distances apply.
- Class 8 (corrosives) and Class 5.1 (oxidisers): Must be separated.
- Class 1 (explosives): Generally cannot be transported with other DG classes.
The driver is responsible for confirming segregation compliance before departure. This is covered extensively in the Prepare for Transport course at Kells Safety Centre.
Practical Tips for NSW Drivers
- Always check the transport category on the DG List — it’s the key to your threshold calculation.
- Carry the ADG Code (current edition) or have access to it — your employer is required to provide this.
- Don’t guess — if you’re not sure whether a quantity crosses the threshold, treat it as a placard load until you can confirm.
- Packaging type doesn’t change the threshold — IBCs, drums, and bulk tanks all count toward the same aggregate.
- Check your EIP — if your vehicle carries a placard load, the EIP must be present, legible, and up to date.
- Keep transport documentation current — the transport document must list all DG consignments with correct class, UN number, and quantity.
Need to get your DG licence so you can legally carry placard loads in NSW? Kells Safety Centre (RTO 91528) delivers the TLILIC0001 Dangerous Goods Licence course at Wetherill Park and Wollongong.
FAQs
What exactly is a placard load?
A placard load is a transport consignment where the aggregate quantity of dangerous goods on the vehicle exceeds the threshold set in ADG Code Table 3.2.1 for the relevant transport category. Once the threshold is exceeded, the vehicle must display class placards, an EIP, and the driver must hold a DG licence. The threshold is zero for Transport Category 1, 1,000 kg/L for Category 2, and 10,000 kg/L for Category 3.
How do I calculate my placard load threshold?
First, identify the transport category for each product from the ADG Code Dangerous Goods List. Then add up the total quantity of all goods in the same transport category on the vehicle. Compare that total against the threshold: 0 for Category 1, 1,000 kg/L for Category 2, and 10,000 kg/L for Category 3. If the total equals or exceeds the threshold for any category, the load is a placard load.
Do I need a DG licence for a non-placard load?
No — a NSW DG licence (TLILIC0001) is only required for drivers carrying a placard load. If your aggregate quantity is below the threshold for all transport categories on the vehicle, you do not need a DG licence. However, your employer may still require you to complete DG Awareness training for workplace WHS compliance.
Do different transport categories add together?
No — each transport category is calculated separately. You add up goods within the same transport category and check against that category’s threshold only. Being under the threshold for Category 2 does not prevent a Category 1 placard load, since Category 1 goods require placards at any quantity.
What if I’m carrying goods from multiple DG classes?
Each transport category has its own threshold, so goods from different classes but the same transport category are aggregated. You also need to check the ADG Code segregation table (Table 9.3) to confirm that the classes you’re carrying are permitted on the same vehicle and whether segregation distances apply.
Where do I find the transport category for my product?
The transport category is listed in the Dangerous Goods List (Table 3.2) of the ADG Code, alongside the UN number, class, and packing group. You can also find it on the product’s Safety Data Sheet or ask your supplier for the DG classification information.
What happens if I’m caught carrying a placard load without placards?
Carrying a placard load without correct placards, EIP, DG licence, and documentation is a serious offence under NSW dangerous goods law enforced by the NSW EPA and NSW Police. Penalties include significant fines, licence suspension, and potential criminal charges if the breach results in an incident. Compliance is not optional for placard loads.
Does the packaging type affect the threshold?
No — the threshold is based on the aggregate quantity of the dangerous goods carried, regardless of packaging type. IBCs, drums, jerrycans, and bulk tanks all count toward the total. A 1,000-litre IBC and ten 100-litre drums both contribute 1,000 litres to the aggregate.
Do I need placards for empty DG containers?
Empty uncleaned containers that previously held dangerous goods may still require placards if the residue quantity would have constituted a placard load. The ADG Code has specific provisions for empty packagings — check Part 4 if you’re transporting empties.
How do I learn placard load calculations properly?
The Dangerous Goods Licence course (TLILIC0001) at Kells Safety Centre (RTO 91528) covers placard load thresholds, transport categories, vehicle marking, EIP requirements, and segregation rules in detail. The course is delivered at Wetherill Park and Wollongong. Book through the training courses page or call 1300 887 576.
