AS 1319 Explained: The 5 Categories of Safety Signs Every Australian Workplace Needs

If you manage a workplace in Australia, your safety signs must comply with AS 1319-1994 (reaffirmed 2018). This standard has been the foundation of workplace safety signage for over three decades, and it's referenced by WHS legislation in every state and territory.

Getting it wrong isn't just a standards issue — it's a legal one. Penalties for non-compliance with workplace safety signage obligations can reach over $3 million for corporations. In 2025, a Sydney builder was fined $470,000 for multiple WHS breaches that included signage failures.

Here's what AS 1319 actually requires.

The five sign categories

AS 1319 defines five distinct categories of safety signs. Each has specific colours, shapes, and usage rules. Mixing them up isn't just visually confusing — it can create genuine safety risks when people rely on colour and shape recognition in emergencies.

1. Danger signs

Purpose: Alert people to specific hazards that could cause serious injury or death.

Design:

• Black header banner with red oval
• White "DANGER" text inside the red oval
• Pictograms are not permitted on danger signs
• Black text below describing the specific hazard

Example uses: High voltage areas, confined spaces, fall hazards, areas with toxic substances.

Key rule: Danger signs are reserved for the most serious hazards. Overusing them dilutes their impact. If a hazard could cause serious injury or death, it's a danger sign. If it could cause moderate injury, it's a warning sign.

2. Warning signs

Purpose: Alert people to hazards that could cause injury, but are less immediately life-threatening than danger-level hazards.

Design:

• Yellow (amber) background
• Black border and text
• Black pictogram or text describing the hazard

Example uses: Forklift operating areas, slippery surfaces, overhead hazards, chemical storage areas.

Key rule: Warning signs can include pictograms, unlike danger signs. The yellow background must be clearly distinguishable from the environment — placing a yellow warning sign against a yellow wall defeats its purpose.

3. Mandatory signs

Purpose: Indicate actions that must be taken — typically relating to personal protective equipment (PPE) or required procedures.

Design:

• Circular shape
• Blue background
• White symbols or pictures
• Black letters for any text

Example uses: Hard hat required, safety glasses mandatory, hearing protection must be worn, hand washing required.

Key rule: Mandatory signs tell people what they must do, not what they must avoid. If you need to prohibit an action, that's a prohibition sign. If you need to require an action, that's a mandatory sign.

4. Prohibition signs

Purpose: Indicate actions that are not permitted.

Design:

• White background
• Red circle with a diagonal red slash (from upper-left to lower-right)
• Black pictogram showing the prohibited action

Example uses: No smoking, no entry, no photography, do not operate.

Key rule: The red diagonal slash must cross over the pictogram. A prohibition sign without the slash is just a picture — it doesn't communicate "don't do this."

5. Emergency and fire signs

Purpose: Provide information about emergency facilities and firefighting equipment.

Design (emergency information):

• Green background
• White text and pictographs
• Used for exit signs, first aid locations, emergency equipment, assembly points

Design (fire equipment):

• Red background
• White symbols
• Used for fire extinguisher locations, hose reels, fire blankets, hydrants, alarm points

Example uses: Exit signs, first aid stations, fire extinguisher locations, emergency assembly points.

Key rule: Green means "safe condition" or "this way to safety." Red means "fire equipment is here." These colours are universally understood and consistent with international standards (ISO 7010).

The sizing formula

AS 1319 doesn't prescribe a single sign size for all situations. Instead, it provides a formula based on viewing distance:

• Symbols: Minimum 15mm per metre of viewing distance
• Uppercase text: Minimum 5mm per metre of viewing distance

What this means in practice

Viewing distance	Minimum symbol height	Minimum text height
5 metres	75mm	25mm
10 metres	150mm	50mm
20 metres	300mm	100mm
50 metres	750mm	250mm

This formula explains why the same type of sign comes in different sizes. A danger sign in a small workshop where the maximum viewing distance is 5 metres can be much smaller than one in a large warehouse where workers need to read it from 20 metres away.

Common mistake: Choosing sign sizes based on what looks proportional to the space rather than calculating from viewing distance. A sign that looks fine on the wall might be illegally undersized if workers need to read it from the far side of the room.

Placement rules

AS 1319 specifies that safety signs must be:

• Conspicuous — clearly visible from all relevant approaches
• At eye level — positioned where people will naturally see them (typically 1.5m to 1.8m from floor level for pedestrian areas)
• Unobstructed — not blocked by equipment, stock, doors, or other signs
• Well illuminated — readable under the lighting conditions present in the area

Placement considerations people miss

Temporary obstructions: A sign that's visible when the area is empty might be hidden behind pallets, vehicles, or equipment during normal operations. Assessment should consider worst-case conditions, not best-case.

Multiple approaches: If a hazard area can be approached from three directions, you need signs visible from all three directions — not just the main entrance.

Height in vehicle areas: In areas where workers are on forklifts or elevated platforms, signs at standard pedestrian eye level may be below the operator's line of sight.

Maintenance obligations

AS 1319 requires that safety signs be:

• Maintained in good condition — damaged, faded, or obscured signs must be replaced
• Kept clean — signs covered in dust, grime, or splatter don't meet compliance requirements
• Reviewed when conditions change — new hazards, changed processes, or altered layouts require signage review

There's no prescribed inspection frequency in AS 1319 itself, but WHS regulations in each state require regular workplace inspections that should include signage checks. Best practice is to include signage in your monthly workplace inspection routine.

Penalties for non-compliance

Safety signage falls under Work Health and Safety (WHS) legislation, which means penalties are substantial:

Offence level	Corporation	Individual
Basic breach (e.g., missing or non-compliant signs)	Up to $23,100	Up to $4,400
Serious offence (reckless conduct, risk of serious injury)	Up to $3,000,000+	Up to $600,000
Category 1 offence (reckless, death or serious injury)	Higher penalties + potential imprisonment	Up to 5 years imprisonment

The $3 million figure isn't hypothetical. WHS regulators in Australia actively prosecute signage failures when they contribute to workplace incidents. The 2025 Sydney builder case — $470,000 in fines for multiple breaches including signage — demonstrates that regulators treat signage as a core safety obligation, not a minor administrative matter.

Managing AS 1319 compliance across sites

For organisations with multiple workplaces, maintaining consistent AS 1319 compliance becomes an inventory management challenge. You need to know:

• What signs exist at each site
• Whether they're the correct category, size, and design for their location
• Whether they're in good condition
• When they were last inspected
• Whether any workplace changes have made existing signs inadequate

Signplanr helps workplace safety teams manage this by providing a digital inventory of every sign across every site. Each sign is mapped to its physical location, tagged with its category and standard reference, and tracked through regular inspection cycles. When a new hazard is introduced or a workspace layout changes, you can quickly identify which signs need updating.

Quick reference: AS 1319 at a glance

Category	Colour	Shape	Purpose	Pictograms?
Danger	Black/Red/White	Rectangular	Imminent serious hazard	No
Warning	Yellow/Black	Rectangular	Potential injury hazard	Yes
Mandatory	Blue/White	Circular	Required action	Yes
Prohibition	Red/White/Black	Circular + slash	Forbidden action	Yes
Emergency/Fire	Green or Red/White	Rectangular	Safety info / fire equipment	Yes

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This article is for general information only and does not constitute legal advice. AS 1319-1994 (R2018) should be purchased from Standards Australia for the complete and authoritative text. Always consult a WHS professional for site-specific advice.