Why Does Forklift Service Weight Matter?

A 25-ton forklift does not weigh 25 tons.

That number describes its rated lifting capacity.

The forklift itself can weigh considerably more.

For example, our current 25-ton forklift specification has a 25,000 kg rated capacity but a 35,500 kg service weight.

These two numbers should not be confused.

Service weight is the approximate operating weight of the forklift itself in its specified configuration.

It typically includes the truck's major operating components such as:

• Chassis
• Counterweight
• Mast
• Engine or battery
• Axles
• Tires
• Standard fork system

The exact definition and final weight can vary with the configuration, so customized equipment may differ from the catalogue figure.

A counterbalance forklift needs enough truck mass and structure to handle the rated load safely.

As capacity increases, so do components such as:

• Counterweight
• Chassis
• Mast
• Axles
• Tires

This is why large forklifts become heavy very quickly.

A buyer ordering a 30-ton truck is therefore not planning for a machine that weighs around 30 tons. Our current CPCD300, for example, lists a service weight of approximately 36.5 tons before cargo is added.

Imagine a heavy forklift entering an older factory building.

The question is not only:

Can the forklift fit through the door?

We also need to know whether the floor can support it.

The floor is carrying:

forklift weight + cargo weight

and the load is not distributed evenly across the whole building floor.

OSHA specifically advises that operating surfaces must be strong enough to support the forklift, its load and operator, and that posted floor-loading limits should be observed.

This becomes particularly important with large-capacity trucks.

Service weight also affects how the forklift is transported.

A heavy forklift may require:

• Heavy-haul trailer
• Suitable crane or loading equipment
• Route planning
• Port handling arrangements

For export machines, overall dimensions and service weight are both important when deciding how the truck will be shipped.

Removing a mast or another component may reduce transport dimensions, but the weight of each transport section still needs to be considered.

If the forklift needs to travel across:

• Loading ramps
• Dock plates
• Platforms
• Bridges

their load rating needs to match the actual working condition.

A 35-ton forklift carrying a 25-ton load can place a very large total mass onto a relatively small working area.

This is not something that should be discovered after the machine arrives.

A catalogue number is not always the final shipping or working weight.

The final configuration may include:

• Closed cabin
• Solid tires
• Longer forks
• Heavy attachment
• Larger mast
• Additional counterweight

Some of these can increase the final machine weight.

For a customized heavy duty forklift, buyers should therefore use the confirmed production specification rather than an old standard catalogue figure when planning transport or floor loading.

These two specifications are also different.

Service weight tells us the total approximate weight of the truck.

Axle load tells us how that weight is distributed between the front and rear axles under a particular condition.

For floor-loading calculations, axle loads can sometimes be more useful than service weight alone.

We will look at that separately in Blog 25.

If a heavy forklift will work inside a factory or on a special platform, confirm:

Forklift service weight
Maximum cargo weight
Floor or platform rating
Travel route
Final truck configuration

For large projects, this information should be checked before delivery rather than after installation.

References

• OSHA - Forklift Workplace Physical Conditions and Floor Loading Limits.
• Konecranes - Lift Truck Service Weight and Axle Pressure Data.
• Propolift - 25 Ton Forklift Specifications.