Warning Safety Signs

A warning safety sign identifies a hazard or hazardous condition that requires people to exercise caution. Warning signs are used to alert workers, contractors and visitors to potential risks such as moving vehicles, slippery surfaces, uneven ground or overhead hazards before they enter the area. Their purpose is to encourage safer behaviour and help people recognise hazards before an incident occurs.

Warning safety signs typically feature a yellow background with a black triangular hazard symbol, black border and black text. The yellow and black colour combination is widely recognised in Australian workplaces and helps warning signs stand out in busy industrial environments.

The main difference is the level of risk being communicated.

A warning sign identifies a hazard that requires caution but is not generally expected to present an immediate life-threatening danger. Examples include slippery floors, forklifts operating, uneven surfaces or overhead obstacles.

A danger sign is reserved for hazards or hazardous conditions that are likely to cause death or serious injury if ignored. Examples include high voltage electrical equipment, confined spaces, asbestos removal or crushing hazards.

Selecting the correct sign helps communicate the seriousness of the hazard accurately.

Warning signs should be used wherever people need advance notice of a hazard so they can take appropriate care. They are commonly installed where hazards cannot be completely eliminated or where temporary hazards exist.

Typical applications include:

• Forklift operating areas 
• Wet or slippery floors 
• Trip hazards 
• Uneven surfaces 
• Loading docks 
• Overhead cranes 
• Low headroom 
• Moving machinery 
• Vehicle crossings 
• Hot surfaces 
• Blind corners 
• Construction work zones

AS 1319:1994, Safety Signs for the Occupational Environment, is Australia's recognised standard covering the design and use of occupational safety signs. It provides guidance on safety sign categories, colours, symbols and their intended use within workplaces.

Depending on the workplace and industry, additional legislation, Codes of Practice or Australian Standards may also apply.

Warning signs should always be installed before a person reaches the hazard.

They are commonly positioned at:

• Entry doors 
• Warehouse aisles 
• Construction site access points 
• Machinery operating areas 
• Loading docks 
• Vehicle crossings 
• Walkways 
• Blind corners 
• Stairways 
• Changes in floor level 

The sign should provide enough warning for a person to recognise the hazard and adjust their behaviour before entering the area.

Yes. Industro can produce custom warning safety signs to suit your workplace requirements.

Custom options include:

• Company logos 
• Site-specific wording 
• Custom hazard descriptions 
• Multiple languages 
• QR codes 
• Department names 
• Project information 
• Directional arrows 
• Custom sizes 
• Reflective finishes 
• Sequential numbering 

Custom signs are ideal for unique workplace hazards that are not covered by standard signage.

The most suitable material depends on the installation environment and expected service life.

For long-term outdoor installations, aluminium composite panel (ACM) and metal signs are commonly chosen because they provide excellent durability and weather resistance.

For temporary outdoor applications, corflute offers a lightweight and economical solution.

For smooth surfaces such as machinery or equipment, self-adhesive vinyl may be appropriate.

If improved visibility is required during low-light conditions, reflective materials may also be considered.

The correct size depends on:

• Viewing distance 
• Amount of text 
• Hazard severity 
• Mounting location 
• Whether people are walking or driving 
• Available installation space 

Smaller signs are suitable for machinery, doors and equipment, while larger signs are generally more appropriate for warehouse entrances, construction sites, vehicle routes and loading docks.

Choosing a sign that is too small may reduce its effectiveness, particularly where people need to identify the message from a distance.

Symbols are strongly recommended because they help communicate hazards quickly, particularly in workplaces with visitors, contractors or multilingual workforces.

Recognised hazard symbols allow people to understand the type of risk before reading the supporting text.

Many warning signs combine both a hazard symbol and descriptive wording to provide the clearest possible communication.

Some of the most commonly used warning signs include:

• Warning Forklifts Operating 
• Warning Slippery Surface 
• Warning Trip Hazard 
• Warning Uneven Surface 
• Warning Moving Machinery 
• Warning Overhead Crane 
• Warning Reversing Vehicles 
• Warning Hot Surface 
• Warning Falling Objects 
• Warning Low Headroom 

These signs are widely used across warehouses, construction sites, manufacturing facilities and commercial workplaces.

Workplace safety legislation generally requires businesses to identify and manage hazards. Where signage forms part of the chosen risk controls, warning signs may be required to communicate hazards effectively.

However, warning signs alone do not make a workplace compliant. They should support broader safety measures such as risk assessments, engineering controls, safe work procedures, training and supervision.

Yes. Warning signs are available in materials suitable for both indoor and outdoor environments.
Indoor applications commonly use polypropylene or self-adhesive vinyl, while outdoor installations often benefit from aluminium composite, metal or reflective materials designed to withstand weather exposure.

Warning signs are used across a wide range of industries, including:

• Construction 
• Warehousing 
• Manufacturing 
• Mining 
• Logistics 
• Agriculture 
• Food processing 
• Healthcare 
• Utilities 
• Education 
• Government 
• Transport 
• Infrastructure 
• Commercial property 

Almost any workplace with identifiable hazards can benefit from appropriately selected warning signage.

A warning sign alerts people to a hazard and encourages them to take care.

A mandatory sign tells people that they must carry out a specific action, such as wearing eye protection or safety footwear.

For example:

• Warning: "Forklifts Operating" 
• Mandatory: "High-Visibility Clothing Must Be Worn" 

Each sign category serves a different purpose and should be selected according to the workplace hazard.

Warning signs should be inspected regularly as part of routine workplace safety inspections.

Check for:

• Fading 
• Physical damage 
• Dirt or contamination 
• Obstructions 
• Loose fixings 
• Changes to site layout 
• Incorrect or outdated information 

Signs should be replaced if they become difficult to read or no longer accurately reflect workplace conditions.

Yes. Prolonged exposure to ultraviolet (UV) light and harsh weather can cause some signage materials to fade over time.

For exposed outdoor locations, choosing durable materials such as aluminium composite or metal can help maximise service life.

Reflective warning signs are recommended where hazards need to remain visible in low-light conditions or where they will be viewed by vehicle operators using headlights.

Typical applications include:

• Car parks 
• Warehouse yards 
• Loading docks 
• Site entrances 
• Vehicle routes 
• Remote industrial facilities

Yes. Custom warning signs can incorporate company logos, colours and site information, provided the recognised warning colours, symbols and overall clarity of the safety message are maintained.

Where several hazards exist in the same location, separate warning signs or a well-designed combined sign may be appropriate.

Avoid overcrowding an area with too many individual signs, as excessive signage can reduce readability and make important messages easier to overlook.

Start by identifying the hazard through a workplace risk assessment.

Consider:

• The nature of the hazard 
• The level of risk 
• Who may be exposed 
• Viewing distance 
• Indoor or outdoor location 
• Temporary or permanent installation 
• Whether additional controls are required 

If you're unsure which sign best suits your workplace, the Industro team can help you select the most appropriate signage for your application.