Warehouses and distribution centres can be busy, fast-moving environments.

Forklift trucks, delivery vehicles, pallet movements, loading operations and industrial machinery can all create hazards that need to be managed carefully.

Clear warehouse warning signs help communicate these hazards to employees, contractors, delivery drivers and visitors.

But which warning signs are commonly used in UK warehouses? Where should they be displayed? And how do you choose the right signs for your premises?

In this guide, we'll look at some of the most frequently used warehouse safety warning signs, explain their purpose and provide practical buying advice for warehouse managers and business owners.

Why Are Warning Signs Important in Warehouses?

Warehouses often contain several activities taking place at the same time.

Goods may be arriving at loading bays while forklift trucks move pallets, employees pick orders and delivery drivers access designated areas.

Potential hazards can include:

• Moving forklift trucks and other industrial vehicles.

• Pedestrian and vehicle interaction.

• Loading and unloading operations.

• Overhead loads.

• Moving machinery.

• Slippery or uneven floors.

• Electrical equipment.

• Battery charging areas.

• Low headroom and restricted clearance.

• Hazardous substances.

Suitable warning signs help alert people to these risks before they enter a hazardous area.

However, warning signs are only one part of warehouse safety management. They should support appropriate risk assessments, traffic arrangements, training and physical safety controls.

1. Warning – Forklift Trucks Operating

Forklift Truck Warning Signs are among the most recognisable hazard notices used in warehouses.

They alert pedestrians, contractors and visitors that forklift trucks or other industrial vehicles may be operating nearby.

Where Are Forklift Warning Signs Used?

Typical locations include:

• Warehouse entrances.

• Forklift operating areas.

• Loading bays.

• Pedestrian crossing points.

• Vehicle route intersections.

• Access points between storage and production areas.

What Should You Consider Before Buying?

Choose a sign that uses a recognisable forklift warning symbol and is large enough to be seen before people enter the relevant area.

Where forklifts operate close to pedestrian routes, signage should support suitable segregation and traffic management measures.

Buying tip: If you operate several warehouse areas, review all relevant access points before deciding how many forklift warning signs to order.

2. Warning – Overhead Loads

Warehouses may use lifting equipment to move heavy goods or materials.

Overhead Load Warning Signs alert people to areas where suspended or moving loads may present a hazard.

Common Locations

• Lifting and handling areas.

• Industrial loading operations.

• Areas where overhead cranes are used.

• Relevant machinery operating zones.

These signs should be placed where people need to recognise the hazard before entering the affected area.

Warning signs must not replace suitable exclusion zones or safe lifting procedures.

3. Caution – Vehicles Reversing

Reversing vehicles can create significant hazards in loading bays, yards and warehouse access areas.

Vehicles Reversing Signs can help warn people that delivery vehicles or industrial equipment may be manoeuvring nearby.

Where Should They Be Displayed?

Common locations include:

• Delivery yards.

• Loading bay approaches.

• Vehicle turning areas.

• Restricted access points.

• Areas shared by pedestrians and vehicles.

Choosing the Right Sign

Select wording and symbols that accurately reflect the hazard.

If reversing operations take place only in a designated area, position the sign where it is relevant rather than displaying it throughout the entire warehouse.

Important: Signs should support safe vehicle arrangements, not replace measures designed to reduce or control reversing risks.

4. Warning – Moving Machinery

Warehouses and distribution centres may contain conveyors, automated handling equipment, packaging machinery and other moving systems.

Moving Machinery Warning Signs alert people to mechanical hazards.

Common Applications

• Conveyor systems.

• Automated sorting equipment.

• Packaging machinery.

• Industrial production areas.

• Maintenance access points.

The sign should be appropriate to the actual hazard and displayed where workers or visitors need to recognise it.

Machine guarding, isolation procedures and other necessary controls remain essential.

5. Warning – Slippery Surface

Slippery floors can occur in warehouses because of spillages, cleaning operations, wet footwear or other conditions.

Slippery Surface Warning Signs can help draw attention to affected areas.

Typical Locations

• Warehouse entrances.

• Loading bays exposed to rain.

• Cleaning areas.

• Refrigerated or temperature-controlled facilities.

• Locations affected by temporary spillages.

Temporary or Permanent Signs?

A temporary wet floor notice may be appropriate during cleaning or while a short-term hazard is being addressed.

A fixed warning sign may be considered where a persistent hazard remains and other appropriate controls have been implemented.

Buying tip: Avoid using permanent warning signs as a substitute for repairing damaged flooring or dealing with recurring spillages.

6. Warning – Low Headroom

Some warehouses contain restricted clearances beneath beams, mezzanines, pipework or other structures.

Low Headroom Warning Signs alert people to areas where overhead clearance is limited.

Where Are They Useful?

• Mezzanine access points.

• Low beams.

• Restricted warehouse passages.

• Plant and maintenance areas.

• Relevant vehicle routes.

Where appropriate, include accurate clearance information.

A generic warning may be less useful than a sign identifying the actual restriction.

Low-clearance hazards may also require physical protection or changes to access arrangements.

7. Danger – Electricity

Electrical installations are common throughout warehouses.

These may include distribution boards, switchgear, electrical cupboards and industrial equipment.

Electrical Hazard Warning Signs help identify areas where electrical risks are present.

Common Locations

• Electrical switch rooms.

• Distribution boards.

• Plant rooms.

• Electrical cupboards.

• Restricted equipment areas.

Choose signs with appropriate recognised electrical hazard symbols.

The sign should identify the relevant hazard accurately.

For example, a High Voltage warning should not be used unless it correctly describes the installation.

8. Warning – Battery Charging Area

Warehouses that use electric forklift trucks or other battery-powered equipment may have designated charging areas.

Depending on the battery technology and charging arrangements, potential hazards may include:

• Electrical risks.

• Heat.

• Fire.

• Hazardous substances.

• Gas generation from certain battery types.

Choosing Battery Charging Signs

The appropriate notices depend on the equipment, batteries and charging arrangements in use.

Some areas may need a combination of warning, prohibition and mandatory signs rather than a single generic notice.

For example, a charging area might require instructions relating to smoking restrictions, authorised access or suitable protective equipment where the risk assessment identifies those requirements.

Important: Don't assume that every battery charging area presents identical hazards. Lead-acid and lithium-ion systems can have different risk profiles.

9. Warning – Hot Surface

Some warehouses contain equipment that becomes hot during normal operation.

Examples may include:

• Industrial machinery.

• Heating equipment.

• Process equipment.

• Maintenance installations.

• Certain production or packaging systems.

Hot Surface Warning Signs alert people to the possibility of contact with heated surfaces.

Place signs where they can be seen before someone approaches the relevant equipment.

Appropriate guarding, insulation or access controls may also be necessary.

10. Warning – Hazardous Chemicals

Some warehouses store or handle cleaning products, industrial chemicals or other hazardous substances.

Where relevant, Chemical Hazard Warning Signs can help identify risks associated with particular areas or activities.

Examples of Relevant Hazards

• Corrosive substances.

• Toxic substances.

• Flammable materials.

• Hazardous chemical storage.

• Chemical handling operations.

The correct signage depends on the substances involved and the relevant assessments.

Workplace safety signs and chemical product hazard labels serve different purposes, so they should not automatically be treated as interchangeable.

11. Warning – Uneven Surface or Trip Hazard

Warehouse floors and access routes may contain changes in level, temporary obstructions or damaged surfaces.

Uneven Surface Warning Signs and relevant trip hazard notices can help communicate these conditions.

Common Locations

• Temporary maintenance areas.

• Changes in floor level.

• Access ramps.

• Areas with temporary works.

• Locations where hazards cannot immediately be eliminated.

Signs should be used alongside appropriate measures to remove or reduce the hazard.

12. Warning – Automatic Machinery or Doors

Automated warehouses may use powered doors, conveyor systems, robotic equipment and automatic handling systems.

Warning signs can alert people to equipment that may operate or move automatically.

Where Are They Useful?

• Automatic doors.

• Conveyor access points.

• Robotic handling areas.

• Automated storage systems.

• Restricted maintenance zones.

Choose a message that accurately reflects the equipment and the hazard.

Avoid using a general machinery warning when a more specific sign would communicate the risk more clearly.

Warehouse Warning Signs: Quick Comparison Table

This table is a buying guide, not a universal list of legally required warehouse signs.

How Do You Choose the Right Warehouse Warning Signs?

Before ordering, consider the following factors.

1. Identify the Actual Hazard

Start with the risks present in your warehouse.

For example, a warehouse with forklift traffic may need different signs from a small storage facility without powered industrial vehicles.

Don't purchase signs simply because they appear on a standard warehouse checklist.

2. Choose Recognised Safety Symbols

Where suitable, use recognised warning pictograms from BS EN ISO 7010.

Standardised symbols can help communicate hazards consistently.

3. Select the Right Sign Size

A warning sign should be visible from an appropriate distance.

A small sticker may be suitable for some equipment applications.

A larger rigid sign may be preferable at warehouse entrances, loading bays or vehicle routes.

Consider lighting, viewing distance and whether people will approach on foot or in vehicles.

4. Choose a Suitable Material

Depending on the product, The Sign Shed offers warehouse warning signs in materials including self-adhesive vinyl and rigid plastic options.

Self-adhesive signs may be suitable for clean, smooth equipment panels or doors.

Rigid signs may be preferable for walls, fences, gates and other locations where a separate signboard is required.

For outdoor loading areas, check the material's suitability for the expected exposure.

5. Check the Installation Location

Position signs where people can recognise the hazard before encountering it.

Avoid mounting signs behind racking, pallets, open doors or stored goods.

6. Consider Multiple Sign Purchases

If your warehouse has several entrances, vehicle routes or working areas, you may need more than one sign communicating the same hazard.

Review the layout before ordering quantities.

Where Should Warning Signs Be Displayed in a Warehouse?

Warning signs should be positioned according to the hazard they identify.

Don't display every sign in every location. Select and position notices according to the risks present.

Are Warehouse Warning Signs a Legal Requirement in the UK?

The Health and Safety (Safety Signs and Signals) Regulations 1996 require appropriate safety signs where significant risks remain after other relevant measures have been taken.

In warehouses, the signs needed depend on the activities, equipment, layout and identified hazards.

BS EN ISO 7010 provides recognised graphical symbols for many workplace safety signs.

However, there is no universal list of twelve warning signs that every UK warehouse must display.

A small storage facility may have very different requirements from a large automated distribution centre.

Warning signs should support suitable risk assessments, training, traffic management arrangements and other necessary control measures.

Common Mistakes When Buying Warehouse Warning Signs

Avoid these common purchasing errors:

1. Ordering signs without reviewing the warehouse layout.

2. Assuming every warehouse needs identical warning signs.

3. Choosing generic wording when a specific hazard sign is available.

4. Using signs that are too small for the viewing distance.

5. Positioning notices behind racking or stored goods.

6. Forgetting pedestrian approaches to forklift areas.

7. Selecting unsuitable materials for loading bays or outdoor areas.

8. Failing to replace damaged or illegible signs.

9. Using permanent warning signs for hazards that should be eliminated.

10. Assuming signs alone provide adequate protection.

Warehouse Warning Sign Buying Checklist

Use this checklist before placing your next order.

Vehicle & Pedestrian Areas

• Forklift operating areas reviewed.

• Loading bay hazards assessed.

• Reversing vehicle arrangements checked.

• Pedestrian routes reviewed.

• Relevant warning sign locations identified.

Machinery & Equipment

• Conveyor hazards reviewed.

• Automatic machinery assessed.

• Electrical areas identified.

• Battery charging arrangements checked.

• Hot surface hazards considered.

General Warehouse Hazards

• Slippery surfaces reviewed.

• Uneven flooring assessed.

• Low headroom areas identified.

• Chemical hazards reviewed.

• Overhead load hazards considered.

Buying & Installation

• Correct warning symbols selected.

• Sign wording checked.

• Dimensions confirmed.

• Materials selected.

• Quantities calculated.

• Installation positions reviewed.

• Maintenance and replacement arrangements considered.

Important: This checklist supports sign selection and does not replace workplace risk assessments or other legal safety duties.

Buy Warehouse Warning Signs from The Sign Shed

Whether you're fitting out a new warehouse, upgrading a distribution centre or replacing damaged safety notices, choosing the right warning signs helps communicate hazards clearly.

At The Sign Shed, we supply Warning Signs for warehouses, factories, workshops, loading bays and industrial premises throughout the UK.

Our range includes:

• Forklift Truck Warning Signs.

• Machinery Hazard Signs.

• Electrical Warning Signs.

• Slippery Surface Signs.

• Chemical Hazard Signs.

• Industrial Safety Signs.

• Loading Bay and Vehicle Warning Signs.

Choose from a selection of sizes and materials to suit different applications.

Made in Britain, with automatic bulk savings available on eligible orders.

Shop Warning Signs at The Sign Shed and find the right safety notices for your warehouse.