Top 5 Causes of Telehandler Accidents on Construction Sites

Telehandlers are one of the most commonly used machines on construction sites across the UK. Their versatility makes them essential for lifting, loading, and moving materials efficiently in busy working environments.

However, telehandlers are also involved in a significant number of workplace accidents every year. Poor planning, inadequate training, unsafe operation, and changing site conditions can all contribute to serious incidents involving operators, pedestrians, and other workers nearby.

Understanding the most common causes of telehandler accidents can help employers, supervisors, and operators improve safety standards and reduce risk on site.

In this article, we look at five of the most common causes of telehandler accidents and the practical steps that can help prevent them.

Why Telehandler Safety Matters

Telehandlers are powerful pieces of plant equipment capable of lifting heavy loads to significant heights. When used incorrectly, they can quickly become unstable or create dangerous situations on site.

Accidents involving telehandlers can result in:

• serious injuries
• fatalities
• overturns
• dropped loads
• crushing incidents
• structural damage
• costly project delays

Many of these incidents are entirely preventable through proper training, planning, supervision, and safe systems of work.

Poor Visibility and Blind Spots

One of the biggest hazards associated with telehandler operation is restricted visibility.

Operators often work in congested areas with:

• pedestrians
• vehicles
• uneven terrain
• stacked materials
• narrow access routes

Large blind spots can make it difficult to see workers or obstacles, particularly when reversing or manoeuvring with raised loads.

Common Visibility Risks

• reversing without guidance
• travelling with elevated loads
• obstructed mirrors or cameras
• poor lighting conditions
• working in confined spaces

How to Reduce the Risk

• use trained vehicle marshals where required
• maintain clear segregation between vehicles and pedestrians
• keep loads low while travelling
• ensure mirrors and cameras are clean and operational
• improve site lighting where necessary

Good communication and proper site planning are essential for reducing visibility-related incidents.

Overloading the Telehandler

Telehandlers can become unstable if operators attempt to lift loads beyond the machine’s rated capacity.

Unlike forklifts, a telehandler’s lifting capacity changes depending on:

• boom extension
• lifting height
• attachment type
• ground conditions

Overloading can cause:

• overturning
• dropped loads
• structural stress
• loss of control

Common Causes of Overloading

• incorrect weight estimation
• failure to check load charts
• unsuitable attachments
• lifting suspended loads incorrectly
• rushing operations

Best Practice

Operators should:

• understand load charts
• know machine limitations
• use approved attachments
• avoid exceeding safe working loads
• follow lifting plans where required

Proper familiarisation training is especially important when operators move between different telehandler models.

Unsafe Ground Conditions

Ground conditions play a major role in telehandler stability.

Soft, uneven, or unstable ground can increase the risk of overturning, particularly when lifting at height or travelling with loads.

Common Ground Hazards

• mud and soft ground
• excavations and trenches
• slopes and gradients
• hidden voids
• debris and uneven surfaces

Weather conditions can also significantly affect site stability, especially during periods of heavy rain or freezing temperatures.

Reducing Ground Condition Risks

• carry out site assessments before operation
• avoid operating near unsupported excavations
• maintain safe distances from edges
• use suitable travel routes
• monitor changing weather conditions

Operators should never assume ground conditions remain safe throughout the working day.

Inadequate Operator Training

A lack of proper operator training remains one of the leading causes of telehandler accidents.

Without sufficient training, operators may struggle to:

• assess lifting risks
• understand machine limitations
• carry out safe manoeuvres
• recognise unsafe conditions
• complete proper pre-use inspections

Even experienced operators can develop unsafe habits over time if refresher training is not completed.

Why Training Matters

Effective training helps operators:

• understand safe operating procedures
• improve hazard awareness
• reduce unsafe behaviour
• operate efficiently and safely
• comply with workplace requirements

Employers also have responsibilities to ensure operators are competent and appropriately trained for the equipment being used.

Poor Load Handling and Securing

Improper load handling is another common cause of telehandler incidents.

Unstable or poorly secured loads can shift, fall, or cause the machine to become unbalanced during operation.

Common Load Handling Mistakes

• unevenly distributed loads
• travelling too quickly
• carrying raised loads
• incorrect fork positioning
• sudden braking or turning
• unsecured materials

Loads should always be properly assessed before lifting or moving.

Safe Load Handling Tips

• keep loads stable and secure
• travel with loads low to the ground
• avoid sudden movements
• ensure forks are correctly positioned
• follow site lifting procedures

Where lifting operations become more complex, additional planning and supervision may be required.

The Importance of Daily Checks

Daily pre-use inspections are an essential part of telehandler safety.

Operators should check:

• tyres
• forks and attachments
• hydraulic systems
• warning devices
• brakes and steering
• fluid levels
• lights and visibility aids

Defects should be reported immediately and unsafe equipment removed from service.

Daily checks help identify problems before they lead to serious incidents.

Refresher Training and Competence

Telehandler safety should not rely solely on initial training completed years earlier.

Refresher training helps operators:

• maintain safe habits
• stay up to date with best practice
• improve awareness of risks
• reinforce safe operating techniques

Refresher training may be particularly important:

• after incidents or near misses
• following long periods without operating
• when introducing new equipment
• where unsafe practices have been identified

Many employers choose to schedule refresher training every 3 to 5 years as part of ongoing competence management.

Frequently Asked Questions

Do telehandler operators need formal training?

Yes. Employers have responsibilities to ensure operators are competent and appropriately trained for the equipment they use.

What is the most common telehandler accident?

Common incidents include overturning, pedestrian strikes, dropped loads, and collisions caused by poor visibility.

Are daily checks legally required?

Operators should carry out pre-use inspections to ensure equipment is safe before use and defects are identified promptly.

Does refresher training matter for experienced operators?

Yes. Refresher training helps reinforce safe operating practices and reduce the risk of complacency or unsafe habits developing over time.

Final Thoughts

Telehandlers are essential on many construction sites, but they also present significant risks when operated unsafely.

Many accidents are caused by preventable issues such as:

• poor visibility
• overloading
• unsafe ground conditions
• inadequate training
• poor load handling

By improving operator competence, carrying out proper planning, and maintaining strong safety standards, employers can significantly reduce the likelihood of incidents on site.

To find out more about preventing telehandler accidents or even better telehandler training or refresher training opportunities, contact Kentra Training today.